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SOLAR INVERTER PURE SINE WAVE INVERTER Inverter / Solar Charge Controller / Battery Charger / UPS USER MANUAL 1 Content A. General Information------------------------------------------------------- 3 B. Warranty----------------------------------------------------------------------- 4 C. Introduction------------------------------------------------------------------ 6 D. Installation-------------------------------------------------------------------- 10 E. Operation---------------------------------------------------------------------- 13 F. Disabling Functions (P-01)---------------------------------------------- 21 G. Charger Information------------------------------------------------------- 23 H. Power Sharing--------------------------------------------------------------- 27 I. Auxiliary Contacts---------------------------------------------------------- 28 J. The Remote Control Unit------------------------------------------------- 29 K. Programming: Charging Voltages------------------------------------ 30 L. Programming Aux Contacts (AUX1, AUX2)------------------------ 31 M. Maintenance------------------------------------------------------------------ 32 N. Specifications---------------------------------------------------------------- 33 2 z General: „ “ Solar Inverter” (Pure Sine Wave Inverter with Solar Charge Regulator and AC/DC Battery Charger) is a powerful pure sine wave inverter, a sophisticated battery charger that features adaptive charge technology and a high-speed AC transfer switch in a single compact enclosure. „ Besides all this functions , however, the “Solar Inverter” has several advanced features that provides a range of new applications as outlined bellow: In the event of a grid failure, or shore or generator power being disconnected, the inverter within the “Solar Inverter” is automatically in less than 20 millisecond activated and takes over supply to the connected loads. „ Allowed them to continue to operate without disruption. The “Solar Inverter” is very powerful battery charger. It will therefore draw a lot of current from the generator or shore side supply. z INVERTER: „ Pure Sine Wave AC output. „ Very low total harmonic distortion (< 2 %) „ High surge capacity and soft-start design for heavy inductive loads such as air conditioning „ Load detection system for “power saving” mode „ Extremely high efficiency. z Battery Charger : „ The “Solar Inverter” series is built around a bi-directional converter, that operates as an inverter or as a battery charger high capacity three-stage Battery charger Equalization mode conditions Battery for longer life „ Multistage charger-power factor corrected for superior „ Charging temperature sensitive charging for optional „ Care of all batteries (temperature sensor optional) Built in solar charge regulator. z Bypass Function: „ Automatic 60 A (3000W) / 30 A (1500W) transfer relay turns inverter and charger on / off. „ Fast (UPS) mode or delay mode of the Bypass switch. Power sharing prevents tripping of shore power breaker. z Basic Remote Control: „ Power output on / off „ Function mode select „ Programming Battery charging voltage 3 „ Error message display „ Programming auxiliary relay (x2) „ Programming input current limit for power share A. General Information Operating instructions This manual is a part of the delivery package of every Solar Inverter (pure sine inverter+solar charge controller+AC/DC battery charger). It serves as Guidelines for safe and efficient operation of Solar Inverter. The instructions are only valid for use with the following models and accessories. z Power Master PM-1500SL-12 / PM-3000SL-12 z Power Master PM-1500SL-24 / PM-3000SL-24 z Temperature BTS-A-15 (m) z Remote controller RCC-A-03 (3m) / RCC-A-15 (15m) Any personnel who installs a Solar Inverter and / or works with it must be fully familiar with the contents of this manual and must follow exactly all the warnings and safety instructions. Installation of, or any work on, the Solar Inverter must be carried out by a qualified and trained personnel. Installation and application must comply with the respective local installations codes and safety regulations. 4 B. Warranty During production and assembling, all Solar Inverters (Inverter / Chargers) go through many testing procedures. Every Solar Inverter has its own serial number, which helps to refer back to its original data in the event of controls or repairs. That is why you should never remove the identification plate showing the serial number and must ensure you return your warranty card as soon as possible. The warranty period for your Solar Inverter is 1 Year. Power Master Warranty Terms and Conditions Power Master warrants this product against defects in material or workmanship, to the original purchaser only for an initial period of 60 days from date of purchase, when in normal use and service. The warranty period will be extended to a total of one (1) year if a completed warranty card is received within 60 days of purchase. No warranty will be provided on units which have not been paid for in full. Some models may have the option of purchasing an extended warranty period, see elsewhere in this manual for details. This manufacturers warranty is in addition to your consumer rights under local trade practices act. This warranty does not extend to products which have been opened, altered or repaired by persons other than authorized by Power Master or to products which become defective due to acts of God, fire, sabotage, vandalism, contaminated fluids, negligence or failure to operate, house and maintain the product in accordance with instructions provided in this manual. It is extremely important that all installation instructions contained within this manual are strictly adhered to, failure to do so will void your warranty. Except for the foregoing expressed warranty, Power Master makes no warranty, expressed or implied, including but not limited to, the warranty of merchantability or fitness for a particular purpose. Power Master will repair or replace the defective product in accordance with its best judgment. For service under warranty, the buyer or installer must contact Power Master to obtain a “Return Materials Advice” (RMA) document and shipping instructions before returning the product to the factory including , installers time. Power Master will pay return freight charges, if the product is found to be defective within the terms of the warranty. Repair or replacement of any unit does not extend the original warranty terms in any way. This warranty does not cover repairs made necessary due to the product coming in contact with dirt, abrasives, moisture, rust, corrosion, varnish or other similar, or 5 failure due to poor quality or poor condition batteries. Power Master reserve the right with some models to supply an accredited installer with replacement parts, this may allow the unit to become operable much quicker. In this case Power Master are not responsible for any costs of the installer’s time or traveling expenses. Replacement parts are sent at Power Master discretion. Power Master will in no way be held responsible for any losses incurred due to the malfunctioning or failure of a product. Suitably qualified personnel must carry out wiring, failure to do so will void warranty. If you have any questions about this warranty, please do not hesitate to contact us. Caution: Even when a Solar Inverter has been completely disconnected, there can still be deadly voltages present at the OUTPUT. To remove these voltages, you must switch the inverter ON with the ON/OFF switch. After one minute the electronics are discharged and any work can now be safely carried out. Caution: In normal use, lead-acid and lead-gel batteries give out explosive gases. Never smoke or allow a spark or flame in the vicinity of batteries. The batteries must always be stored or placed in a well ventilated area. They should be placed in such a way that there is no danger of short circuiting through carelessness. Never charge frozen batteries. The Solar Inverter is not to be used or sold for life support equipment or applications. B.1 Special Precautions While working on batteries, there should always be a second person close to you or within your voice range, in case help is needed. Plenty of fresh water and soap must be ready at hand so that in case of acid coming in contact with skin, eyes and clothes, the areas in question can be thoroughly washed. If acid enters the eyes, you must thoroughly wash the eyes with cold running water for at least 15 minutes. It is recommended that you immediately consult a medical doctor. Baking powder neutralizes battery acid electrolyte. Always keep some at hand. Special care must be taken when working with metal tools near or on the batteries. With tools such as screwdrivers, spanners etc. short-circuits can result. Sparks produced by the short-circuit can cause an explosion. When working on batteries all personal metal items such as rings, necklaces and bracelets must be removed. Batteries are so powerful that short-circuit with these items can melt them and thus cause severe burns. Always follow the battery manufacturers instructions. Under certain conditions your Solar Inverter or a connected generator can start automatically. While working on an electrical installation you must ensure that 6 these appliances are disconnected before commencing any work. C. Introduction C.1 Basic schematic The Solar Inverter a sine wave inverter with integrated battery charger and AC Bypass switch with many additional functions. C.1.1 The Inverter The sinewave-inverter section of your Solar Inverter generates a sinewave AC voltage with an exceptionally precise voltage and stabilized frequency, In order to start large electric motors, the user has the possibility to employ a short-start-power which is 3-times the nominal power of the Solar Inverter. The inverter is protected against overload and short-circuit. A power-stage with the latest MOS-FET power transistors, a toroidal transformer, and a fast regulating system make-up a robust and reliable inverter with very high efficiency. A load detection system serves to provide the smallest energy consumption and ensures a long life for the battery. C.1.2 The Bypass switch Solar Inverter can be connected to an AC input source. For example a stand-by motor generator or the AC grid, such as shore power or a caravan park. With the transfer system, on one side you have AC voltage which is used to run the load, and on the other side the batteries are being charged. The distribution of energy PV Array Solar Controller BATTERY Home / Boat / Motohome DC BUS Bidirectional Inverter (Inverter / Charger) AC BUS AC Load 7 between the AC loads and battery charger is automatic. C.1.3 The Battery charger The built-in battery charger is capable of charging the batteries quickly and completely. A microprocessor controlled, 3 to 4 Step charging process ensures the optimum charging of the batteries. The desired charging current can be set. The battery charger can be used for lead-acid or gel batteries. Thanks to the floating charge ability of your Solar Inverter, the batteries can remain continuously connected. C.1.4 The solar charge regulator (optional) With the built-in solar regulator, the Solar Inverter is a complete solar-power-center. In a solar installation, this regulator ensures that the batteries are charged correctly. With the Solar Inverter, batteries can be charged with a generator and with the solar modules at the same time. The charging of batteries with both energy sources is carried out fully automatically. C.1.5 Remote control As an option, a remote control can be connected to your Solar Inverter with all functions. The remote control is supplied with a 3m long cable. This cable can be up to 15m long. (RS-485 interface) On the remote control output current and charging current are also shown. C.2 Battery connections Lead-acid batteries are normally available in blocks of 2V, 6V or 12V. In most cases, to generate the necessary operating voltage and the capacity of the 8 batteries for the Solar Inverter, many batteries have to be connected together in parallel and/or in series. Following three examples are shown: C.2.1 Parallel Connection: C.2.2 Series Connection: 9 C.2.3 Parallel-Series Connection: 10 D. Installation D.1 Location The location of the Solar Inverter must be chosen by the following criteria: Protection from unauthorized handling. Dry dust free room, no condensation, no rodents. Never install directly over the battery and never in a cabinet together with the batteries. Keep ventilation holes free. The ventilation of the Solar Inverter is designed in such a way that it will work most efficiently when mounted vertically. In mobile installation it is important to keep vibrations to a minimum. D.2 Rear Panel Connections / Front side A Battery +/- Battery cables. B SOLAR +/- Connections for Solar modules. C AUX1 contact Connecting terminal for Auxiliary contact 1. D AUX2 contact Connecting terminal for Auxiliary contact 2. E BTS (Battery temp. sensor) Connecting terminal for Temperature sensor. 11 F EXT AC IN Connecting terminal for AC input. G AC OUT Connecting terminal for AC output. D.3 Cabling / wiring When making connections to the Solar Inverter you must ensure that all connections are carried out in a clean and correct manner and under no circumstances that a cable is connected to a wrong terminal. Connecting the Solar Inverter must be carried out in the following order. D.3.1 Pre-installation settings Before you start with the wiring of the Solar Inverter you must set the type of battery. If sealed-gel batteries are used then you must set the parameter P-04 ( Equalization charging ) is “ Disable “.. In case of normal lead-acid batteries, these can handle a higher equalizing charge, the P-04 can be set to “ Enable “, D.3.2 Connection to battery Prepare the batteries for connection. Prepare battery cables, if necessary press on cable tabs/shoes. Connect the red cable to the Battery positive fuse/circuit breaker and the black cable to battery Minus (-) Take care when connecting the second cable to the battery, as a spark is produced, this is caused for a short time due to high current flowing in the Solar Inverter to charge the capacitors. This is another reason to install a battery fuse/circuit breaker. For this reason follow strictly the safety measures described in this manual. DO NOT INSERT THE BATTERY FUSE AT THIS STAGE. D.3.3 Connection to the AC OUTPUT. The AC output must be connected to the screw terminal AC OUTPUT. For this, use a 3-core cable with a conductor cross section of 2, 5mm². Connections are marked as follows “OUT / N”=Neutral, “GND”=Earth, “OUT / L”=Live or Active. Caution: High voltage can be at the AC output, ensure the Solar Inverter is not connected when making AC connections. D.3.4 Connection to the AC INPUT The AC input supply from the electricity grid or from a generator must be connected to the screw terminals AC INPUT. For this use a 3-core cable with a conductor cross section of 2, 5mm². Connections are marked as follows “IN / N”=Neutral, “GND”=Earth, “IN / L”=Live or Active. 12 D.3.5 Connect the Solar modules: SOLAR IN +/- Solar modules are connected on these terminals. Under no circumstances should any other energy source i.e. wind generator be connected to these terminals. Depending on the power of the modules, the cable cross section should be 2.5 up to 6mm². Before connecting it is necessary to check with a Voltmeter that the voltage of the Module meets the following values: Power Master PM –1500SL –12 / PM – 3000SL –12 17-25V / 30A Power Master PM –1500SL –24 / PM – 3000SL –24 34-45V / 30A. D.3.6 Connection to Aux1 & AUX2: On these three terminals, it is a potential free change-over contact capable of switching a maximum current and voltage of 16A/250V ac. The “ multi-display “ on the front of Solar Inverter can show the status of these contacts. D.3.7 Connection to Remote control unit ( optional ): The Remote control unit of Solar Inverter RCC-A is connected in the “Remote control” of front panel with a RJ11 / 6 connector. The Remote Control can be plugged IN at any time. Push in the connector, without forcing it, until you hear the ”click”. Now the connector is locked in place. The same applies to the plug at the Remote control unit. The length of the cable for the Remote control should not exceed 15m, it comes standard with 3m cable. D.3.8 Connection to Temperature Sensor (Optional): To connect the battery temperature sensor we recommend using a wing nut style battery terminal to allow multiple lugs from the positive pole of the battery. Use the diagram below as a guide for connecting both the sensor and the positive battery lead. Always ensure that the positive cable/lug is underneath the temperature sensor cable/lug. This will ensure safe operation of both the inverter and battery bank. 13 E. Operation E.1 Front Panel Display And Operating Description E.2 Push buttons Push buttons Name Description PB1 RUN/STOP Solar Inverter RUN/STOP key PB2 FUNC Solar Inverter Operation mode select key. PB3 AUX1 Auxiliary contract (aux1, aux2) Manual / Active change. And Function programming key PB4 DSPL Multi-display select key PB5 UP(△ ) △ Increment key. 12 7 9 8 11 10 6 5 3 4 2 1 PB6 PB5 PB7 PB4 PB3 PB2 PB1 14 PB6 DOWN (▽ ) ▽ Decrement key. PB7 ENTER Data write key. E.3 LED INDICATOR: LED Name L ED ON LED Blink LED OFF 1 AC IN 1. Input voltage normal, and position >(P-06) ”transfer Voltage Level” (150VAC~240VAC) 2. Input voltage frequency range in between(45~60Hz) Has input power, but voltage or frequency is not in the allowance range. No input power 2 CHARGER Green : Battery charger is working. Green Blink : Battery charger is standby. Orange Blink : Battery charger is disable. -------------- 3 SOLAR PANEL Solar module is delivering energy. ----------------------------- 1. Solar module aren’t connect or 2. Day or Night / (cloudy day) 4 SOLAR CHARGER Solar charger is working ------------------------------ Solar charger is disable. 5 AC OUT There is voltage at the “AC OUT” terminal. No voltage at the “AC OUT” terminal. ------------- 6 INVERTER Green : Inverter is working. Green Blink : Inverter is standby Orange Blink : Inverter is disable. -------------- 7 EQUALIZE In Equalize charging Process ------------------------------ Disable Equalize charging function 8 BATTERY Approx state of charge or discharge of Battery. 15 9 BYPASS Green : BYPASS switch is active AC IN voltage is being sent directly to AC OUT terminal Green Blink :BYPASS switch standby. Orange Blink : BYPASS switch disable --------------- 10 RUN/STOP Green : Solar Inverter turn on. Red : Solar Inverter turn off. Red Blink : Auto-Restart is in use --------------- 11 MULTI-DISPLAY LED In Inverter Mode In Charger Mode 9.1 Battery Voltage Battery Voltage 9.2 Output Voltage Input Voltage 9.3 Output Frequency Charging Phase 9.4 AC output current Battery charging current 9.5 Indicator of parameter setting or modify or monitor. 9.6 Indicator of error message 12 POWER MONITOR Displays the value of the output power in % of max continuous power (in Inverter Mode) and the charge current in Amps. (in Charger Mode) In this mode the 200% LED indicate that power sharing is in use. LED 9.4 LED 9.5 LED 9.6 LED 9.1 LED 9.3 LED 9.2 Display monitoring values or set values of each parameter. :Battery under voltage trip. :Battery over voltage trip. :AC out overload trip. :Heatersink overtemperature trip. 16 E.4 Solar Inverter list of parameters Parameter Name Factory setting MIN MAX Remark P-00 Password 0 0 255 0 : P-00 ~ P-17 can be read and set 5 : P-00 ~ P-17 initialization P-01 Function mode select Fnc0 Fnc0 Fnc3 Fnc0 : all function is enable Fnc1 : Bypass, Charger enable Fnc2 : Inverter enable Fnc3 : Bypass enable P-02 Charging current 25A 18A 50A 35A 0 12V/1500W : 50A 24V/1500W : 35A 12V/3000W : 100A 24V/3000W : 70A P-03 Input limit current 15A 8A 30A 15A 0 1500W/100V : 15A 1500W/200V : 8A 3000W/100V : 30A 3000W/200V : 15A P-04 Equalization charging 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-05 Transfer-Delay function 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-06 Transfer voltage 80V (150V) 80V (150V) 110V (230V) P-07 Power saving function 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-08 Aux.1 Contact function select 1 0 0 255 Note1 P-09 Aux.1 Contact function select 2 240 0 255 Note2 P-10 Aux.2 Contact function select 1 0 0 255 Note1 17 P-11 Aux.2 Contact function select 2 240 0 255 Note2 P-12 Low Voltage Cut Out 2 0 4 0 : 10.8V/21.6V/43.2V 1 : 11.4V/22.8V/45.6V 2 : 11.6V/23.2V/46.4V 3 : 11.8V/23.6V/47.2V 4 : 12.0V/24.0V/48.0V P-13 Absorption Voltage 1 0 4 0 : 14.2V/28.4V/56.8V 1 : 14.4V/28.8V/57.6V 2 : 14.6V/29.2V/58.4V 3 : 14.8V/29.6V/59.2V 4 : 15.0V/30.0V/60.0V P-14 Absorption Time 2 0 4 0 : 1Min 1 : 1HR 2 : 2HR 3 : 3HR 4 : 4HR P-15 Float Voltage 2 0 4 0 : 13.3V/26.6V/53.2V 1 : 13.4V/26.8V/53.6V 2 : 13.5V/27.0V/54.0V 3 : 13.6V/27.2V/54.4V 4 : 13.7V/27.4V/54.8V P-16 Equalize Voltage 2 0 4 0 : 15.1V/30.2V/62.0V 1 : 15.2V/30.4V/61.6V 2 : 15.3V/30.6V/61.2V 3 : 15.4V/30.8V/60.8V 4 : 15.5V/31.0V/60.4V P-17 Software version Read only Note 1 : Aux.1/2 Contact function selection1(bit0) - Aux.1 /2Contact function selection 1(bit1) - battery status 25% Aux.1/2 Contact function selection 1(bit2) - battery statuts50% Aux.1/2 Contact function selection 1(bit3) - battery status75% Aux.1/2 Contact function selection 1(bit4) - battery stattus100% Aux.1/2 Contact function selection 1(bit5) - In Equalize Cycle Aux.1/2 Contact function selection 1(bit6) - SOLAR CHARGER action Aux.1/2 Contact function selection 1(bit7) - CHARGER action Note 2 : Aux.1/2 Contact function selection 2(bit0) – AC IN action Aux.1/2 Contact function selection 2 (bit1) – BYPASS action 18 Aux.1/2 Contact function selection 2 (bit2) – AC OUT action Aux.1/2 Contact function selection 2 (bit3) – INVERTER action Aux.1/2 Contact function selection 2 (bit4) – Over Temperature Aux.1/2 Contact function selection 2 (bit5) – Over Load Aux.1/2 Contact function selection 2 (bit6) – Battery Low/High Aux.1/2 Contact function selection 2 (bit7) – STOP SOLAR INVERTER PURE SINE WAVE INVERTER Inverter / Solar Charge Controller / Battery Charger / UPS USER MANUAL 1 Content A. General Information------------------------------------------------------- 3 B. Warranty----------------------------------------------------------------------- 4 C. Introduction------------------------------------------------------------------ 6 D. Installation-------------------------------------------------------------------- 10 E. Operation---------------------------------------------------------------------- 13 F. Disabling Functions (P-01)---------------------------------------------- 21 G. Charger Information------------------------------------------------------- 23 H. Power Sharing--------------------------------------------------------------- 27 I. Auxiliary Contacts---------------------------------------------------------- 28 J. The Remote Control Unit------------------------------------------------- 29 K. Programming: Charging Voltages------------------------------------ 30 L. Programming Aux Contacts (AUX1, AUX2)------------------------ 31 M. Maintenance------------------------------------------------------------------ 32 N. Specifications---------------------------------------------------------------- 33 2 z General: „ “ Solar Inverter” (Pure Sine Wave Inverter with Solar Charge Regulator and AC/DC Battery Charger) is a powerful pure sine wave inverter, a sophisticated battery charger that features adaptive charge technology and a high-speed AC transfer switch in a single compact enclosure. „ Besides all this functions , however, the “Solar Inverter” has several advanced features that provides a range of new applications as outlined bellow: In the event of a grid failure, or shore or generator power being disconnected, the inverter within the “Solar Inverter” is automatically in less than 20 millisecond activated and takes over supply to the connected loads. „ Allowed them to continue to operate without disruption. The “Solar Inverter” is very powerful battery charger. It will therefore draw a lot of current from the generator or shore side supply. z INVERTER: „ Pure Sine Wave AC output. „ Very low total harmonic distortion (< 2 %) „ High surge capacity and soft-start design for heavy inductive loads such as air conditioning „ Load detection system for “power saving” mode „ Extremely high efficiency. z Battery Charger : „ The “Solar Inverter” series is built around a bi-directional converter, that operates as an inverter or as a battery charger high capacity three-stage Battery charger Equalization mode conditions Battery for longer life „ Multistage charger-power factor corrected for superior „ Charging temperature sensitive charging for optional „ Care of all batteries (temperature sensor optional) Built in solar charge regulator. z Bypass Function: „ Automatic 60 A (3000W) / 30 A (1500W) transfer relay turns inverter and charger on / off. „ Fast (UPS) mode or delay mode of the Bypass switch. Power sharing prevents tripping of shore power breaker. z Basic Remote Control: „ Power output on / off „ Function mode select „ Programming Battery charging voltage 3 „ Error message display „ Programming auxiliary relay (x2) „ Programming input current limit for power share A. General Information Operating instructions This manual is a part of the delivery package of every Solar Inverter (pure sine inverter+solar charge controller+AC/DC battery charger). It serves as Guidelines for safe and efficient operation of Solar Inverter. The instructions are only valid for use with the following models and accessories. z Power Master PM-1500SL-12 / PM-3000SL-12 z Power Master PM-1500SL-24 / PM-3000SL-24 z Temperature BTS-A-15 (m) z Remote controller RCC-A-03 (3m) / RCC-A-15 (15m) Any personnel who installs a Solar Inverter and / or works with it must be fully familiar with the contents of this manual and must follow exactly all the warnings and safety instructions. Installation of, or any work on, the Solar Inverter must be carried out by a qualified and trained personnel. Installation and application must comply with the respective local installations codes and safety regulations. 4 B. Warranty During production and assembling, all Solar Inverters (Inverter / Chargers) go through many testing procedures. Every Solar Inverter has its own serial number, which helps to refer back to its original data in the event of controls or repairs. That is why you should never remove the identification plate showing the serial number and must ensure you return your warranty card as soon as possible. The warranty period for your Solar Inverter is 1 Year. Power Master Warranty Terms and Conditions Power Master warrants this product against defects in material or workmanship, to the original purchaser only for an initial period of 60 days from date of purchase, when in normal use and service. The warranty period will be extended to a total of one (1) year if a completed warranty card is received within 60 days of purchase. No warranty will be provided on units which have not been paid for in full. Some models may have the option of purchasing an extended warranty period, see elsewhere in this manual for details. This manufacturers warranty is in addition to your consumer rights under local trade practices act. This warranty does not extend to products which have been opened, altered or repaired by persons other than authorized by Power Master or to products which become defective due to acts of God, fire, sabotage, vandalism, contaminated fluids, negligence or failure to operate, house and maintain the product in accordance with instructions provided in this manual. It is extremely important that all installation instructions contained within this manual are strictly adhered to, failure to do so will void your warranty. Except for the foregoing expressed warranty, Power Master makes no warranty, expressed or implied, including but not limited to, the warranty of merchantability or fitness for a particular purpose. Power Master will repair or replace the defective product in accordance with its best judgment. For service under warranty, the buyer or installer must contact Power Master to obtain a “Return Materials Advice” (RMA) document and shipping instructions before returning the product to the factory including , installers time. Power Master will pay return freight charges, if the product is found to be defective within the terms of the warranty. Repair or replacement of any unit does not extend the original warranty terms in any way. This warranty does not cover repairs made necessary due to the product coming in contact with dirt, abrasives, moisture, rust, corrosion, varnish or other similar, or 5 failure due to poor quality or poor condition batteries. Power Master reserve the right with some models to supply an accredited installer with replacement parts, this may allow the unit to become operable much quicker. In this case Power Master are not responsible for any costs of the installer’s time or traveling expenses. Replacement parts are sent at Power Master discretion. Power Master will in no way be held responsible for any losses incurred due to the malfunctioning or failure of a product. Suitably qualified personnel must carry out wiring, failure to do so will void warranty. If you have any questions about this warranty, please do not hesitate to contact us. Caution: Even when a Solar Inverter has been completely disconnected, there can still be deadly voltages present at the OUTPUT. To remove these voltages, you must switch the inverter ON with the ON/OFF switch. After one minute the electronics are discharged and any work can now be safely carried out. Caution: In normal use, lead-acid and lead-gel batteries give out explosive gases. Never smoke or allow a spark or flame in the vicinity of batteries. The batteries must always be stored or placed in a well ventilated area. They should be placed in such a way that there is no danger of short circuiting through carelessness. Never charge frozen batteries. The Solar Inverter is not to be used or sold for life support equipment or applications. B.1 Special Precautions While working on batteries, there should always be a second person close to you or within your voice range, in case help is needed. Plenty of fresh water and soap must be ready at hand so that in case of acid coming in contact with skin, eyes and clothes, the areas in question can be thoroughly washed. If acid enters the eyes, you must thoroughly wash the eyes with cold running water for at least 15 minutes. It is recommended that you immediately consult a medical doctor. Baking powder neutralizes battery acid electrolyte. Always keep some at hand. Special care must be taken when working with metal tools near or on the batteries. With tools such as screwdrivers, spanners etc. short-circuits can result. Sparks produced by the short-circuit can cause an explosion. When working on batteries all personal metal items such as rings, necklaces and bracelets must be removed. Batteries are so powerful that short-circuit with these items can melt them and thus cause severe burns. Always follow the battery manufacturers instructions. Under certain conditions your Solar Inverter or a connected generator can start automatically. While working on an electrical installation you must ensure that 6 these appliances are disconnected before commencing any work. C. Introduction C.1 Basic schematic The Solar Inverter a sine wave inverter with integrated battery charger and AC Bypass switch with many additional functions. C.1.1 The Inverter The sinewave-inverter section of your Solar Inverter generates a sinewave AC voltage with an exceptionally precise voltage and stabilized frequency, In order to start large electric motors, the user has the possibility to employ a short-start-power which is 3-times the nominal power of the Solar Inverter. The inverter is protected against overload and short-circuit. A power-stage with the latest MOS-FET power transistors, a toroidal transformer, and a fast regulating system make-up a robust and reliable inverter with very high efficiency. A load detection system serves to provide the smallest energy consumption and ensures a long life for the battery. C.1.2 The Bypass switch Solar Inverter can be connected to an AC input source. For example a stand-by motor generator or the AC grid, such as shore power or a caravan park. With the transfer system, on one side you have AC voltage which is used to run the load, and on the other side the batteries are being charged. The distribution of energy PV Array Solar Controller BATTERY Home / Boat / Motohome DC BUS Bidirectional Inverter (Inverter / Charger) AC BUS AC Load 7 between the AC loads and battery charger is automatic. C.1.3 The Battery charger The built-in battery charger is capable of charging the batteries quickly and completely. A microprocessor controlled, 3 to 4 Step charging process ensures the optimum charging of the batteries. The desired charging current can be set. The battery charger can be used for lead-acid or gel batteries. Thanks to the floating charge ability of your Solar Inverter, the batteries can remain continuously connected. C.1.4 The solar charge regulator (optional) With the built-in solar regulator, the Solar Inverter is a complete solar-power-center. In a solar installation, this regulator ensures that the batteries are charged correctly. With the Solar Inverter, batteries can be charged with a generator and with the solar modules at the same time. The charging of batteries with both energy sources is carried out fully automatically. C.1.5 Remote control As an option, a remote control can be connected to your Solar Inverter with all functions. The remote control is supplied with a 3m long cable. This cable can be up to 15m long. (RS-485 interface) On the remote control output current and charging current are also shown. C.2 Battery connections Lead-acid batteries are normally available in blocks of 2V, 6V or 12V. In most cases, to generate the necessary operating voltage and the capacity of the 8 batteries for the Solar Inverter, many batteries have to be connected together in parallel and/or in series. Following three examples are shown: C.2.1 Parallel Connection: C.2.2 Series Connection: 9 C.2.3 Parallel-Series Connection: 10 D. Installation D.1 Location The location of the Solar Inverter must be chosen by the following criteria: Protection from unauthorized handling. Dry dust free room, no condensation, no rodents. Never install directly over the battery and never in a cabinet together with the batteries. Keep ventilation holes free. The ventilation of the Solar Inverter is designed in such a way that it will work most efficiently when mounted vertically. In mobile installation it is important to keep vibrations to a minimum. D.2 Rear Panel Connections / Front side A Battery +/- Battery cables. B SOLAR +/- Connections for Solar modules. C AUX1 contact Connecting terminal for Auxiliary contact 1. D AUX2 contact Connecting terminal for Auxiliary contact 2. E BTS (Battery temp. sensor) Connecting terminal for Temperature sensor. 11 F EXT AC IN Connecting terminal for AC input. G AC OUT Connecting terminal for AC output. D.3 Cabling / wiring When making connections to the Solar Inverter you must ensure that all connections are carried out in a clean and correct manner and under no circumstances that a cable is connected to a wrong terminal. Connecting the Solar Inverter must be carried out in the following order. D.3.1 Pre-installation settings Before you start with the wiring of the Solar Inverter you must set the type of battery. If sealed-gel batteries are used then you must set the parameter P-04 ( Equalization charging ) is “ Disable “.. In case of normal lead-acid batteries, these can handle a higher equalizing charge, the P-04 can be set to “ Enable “, D.3.2 Connection to battery Prepare the batteries for connection. Prepare battery cables, if necessary press on cable tabs/shoes. Connect the red cable to the Battery positive fuse/circuit breaker and the black cable to battery Minus (-) Take care when connecting the second cable to the battery, as a spark is produced, this is caused for a short time due to high current flowing in the Solar Inverter to charge the capacitors. This is another reason to install a battery fuse/circuit breaker. For this reason follow strictly the safety measures described in this manual. DO NOT INSERT THE BATTERY FUSE AT THIS STAGE. D.3.3 Connection to the AC OUTPUT. The AC output must be connected to the screw terminal AC OUTPUT. For this, use a 3-core cable with a conductor cross section of 2, 5mm². Connections are marked as follows “OUT / N”=Neutral, “GND”=Earth, “OUT / L”=Live or Active. Caution: High voltage can be at the AC output, ensure the Solar Inverter is not connected when making AC connections. D.3.4 Connection to the AC INPUT The AC input supply from the electricity grid or from a generator must be connected to the screw terminals AC INPUT. For this use a 3-core cable with a conductor cross section of 2, 5mm². Connections are marked as follows “IN / N”=Neutral, “GND”=Earth, “IN / L”=Live or Active. 12 D.3.5 Connect the Solar modules: SOLAR IN +/- Solar modules are connected on these terminals. Under no circumstances should any other energy source i.e. wind generator be connected to these terminals. Depending on the power of the modules, the cable cross section should be 2.5 up to 6mm². Before connecting it is necessary to check with a Voltmeter that the voltage of the Module meets the following values: Power Master PM –1500SL –12 / PM – 3000SL –12 17-25V / 30A Power Master PM –1500SL –24 / PM – 3000SL –24 34-45V / 30A. D.3.6 Connection to Aux1 & AUX2: On these three terminals, it is a potential free change-over contact capable of switching a maximum current and voltage of 16A/250V ac. The “ multi-display “ on the front of Solar Inverter can show the status of these contacts. D.3.7 Connection to Remote control unit ( optional ): The Remote control unit of Solar Inverter RCC-A is connected in the “Remote control” of front panel with a RJ11 / 6 connector. The Remote Control can be plugged IN at any time. Push in the connector, without forcing it, until you hear the ”click”. Now the connector is locked in place. The same applies to the plug at the Remote control unit. The length of the cable for the Remote control should not exceed 15m, it comes standard with 3m cable. D.3.8 Connection to Temperature Sensor (Optional): To connect the battery temperature sensor we recommend using a wing nut style battery terminal to allow multiple lugs from the positive pole of the battery. Use the diagram below as a guide for connecting both the sensor and the positive battery lead. Always ensure that the positive cable/lug is underneath the temperature sensor cable/lug. This will ensure safe operation of both the inverter and battery bank. 13 E. Operation E.1 Front Panel Display And Operating Description E.2 Push buttons Push buttons Name Description PB1 RUN/STOP Solar Inverter RUN/STOP key PB2 FUNC Solar Inverter Operation mode select key. PB3 AUX1 Auxiliary contract (aux1, aux2) Manual / Active change. And Function programming key PB4 DSPL Multi-display select key PB5 UP(△ ) △ Increment key. 12 7 9 8 11 10 6 5 3 4 2 1 PB6 PB5 PB7 PB4 PB3 PB2 PB1 14 PB6 DOWN (▽ ) ▽ Decrement key. PB7 ENTER Data write key. E.3 LED INDICATOR: LED Name L ED ON LED Blink LED OFF 1 AC IN 1. Input voltage normal, and position >(P-06) ”transfer Voltage Level” (150VAC~240VAC) 2. Input voltage frequency range in between(45~60Hz) Has input power, but voltage or frequency is not in the allowance range. No input power 2 CHARGER Green : Battery charger is working. Green Blink : Battery charger is standby. Orange Blink : Battery charger is disable. -------------- 3 SOLAR PANEL Solar module is delivering energy. ----------------------------- 1. Solar module aren’t connect or 2. Day or Night / (cloudy day) 4 SOLAR CHARGER Solar charger is working ------------------------------ Solar charger is disable. 5 AC OUT There is voltage at the “AC OUT” terminal. No voltage at the “AC OUT” terminal. ------------- 6 INVERTER Green : Inverter is working. Green Blink : Inverter is standby Orange Blink : Inverter is disable. -------------- 7 EQUALIZE In Equalize charging Process ------------------------------ Disable Equalize charging function 8 BATTERY Approx state of charge or discharge of Battery. 15 9 BYPASS Green : BYPASS switch is active AC IN voltage is being sent directly to AC OUT terminal Green Blink :BYPASS switch standby. Orange Blink : BYPASS switch disable --------------- 10 RUN/STOP Green : Solar Inverter turn on. Red : Solar Inverter turn off. Red Blink : Auto-Restart is in use --------------- 11 MULTI-DISPLAY LED In Inverter Mode In Charger Mode 9.1 Battery Voltage Battery Voltage 9.2 Output Voltage Input Voltage 9.3 Output Frequency Charging Phase 9.4 AC output current Battery charging current 9.5 Indicator of parameter setting or modify or monitor. 9.6 Indicator of error message 12 POWER MONITOR Displays the value of the output power in % of max continuous power (in Inverter Mode) and the charge current in Amps. (in Charger Mode) In this mode the 200% LED indicate that power sharing is in use. LED 9.4 LED 9.5 LED 9.6 LED 9.1 LED 9.3 LED 9.2 Display monitoring values or set values of each parameter. :Battery under voltage trip. :Battery over voltage trip. :AC out overload trip. :Heatersink overtemperature trip. 16 E.4 Solar Inverter list of parameters Parameter Name Factory setting MIN MAX Remark P-00 Password 0 0 255 0 : P-00 ~ P-17 can be read and set 5 : P-00 ~ P-17 initialization P-01 Function mode select Fnc0 Fnc0 Fnc3 Fnc0 : all function is enable Fnc1 : Bypass, Charger enable Fnc2 : Inverter enable Fnc3 : Bypass enable P-02 Charging current 25A 18A 50A 35A 0 12V/1500W : 50A 24V/1500W : 35A 12V/3000W : 100A 24V/3000W : 70A P-03 Input limit current 15A 8A 30A 15A 0 1500W/100V : 15A 1500W/200V : 8A 3000W/100V : 30A 3000W/200V : 15A P-04 Equalization charging 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-05 Transfer-Delay function 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-06 Transfer voltage 80V (150V) 80V (150V) 110V (230V) P-07 Power saving function 0(dis) 0(dis) 1(En) “dis” disable, “En” enable P-08 Aux.1 Contact function select 1 0 0 255 Note1 P-09 Aux.1 Contact function select 2 240 0 255 Note2 P-10 Aux.2 Contact function select 1 0 0 255 Note1 17 P-11 Aux.2 Contact function select 2 240 0 255 Note2 P-12 Low Voltage Cut Out 2 0 4 0 : 10.8V/21.6V/43.2V 1 : 11.4V/22.8V/45.6V 2 : 11.6V/23.2V/46.4V 3 : 11.8V/23.6V/47.2V 4 : 12.0V/24.0V/48.0V P-13 Absorption Voltage 1 0 4 0 : 14.2V/28.4V/56.8V 1 : 14.4V/28.8V/57.6V 2 : 14.6V/29.2V/58.4V 3 : 14.8V/29.6V/59.2V 4 : 15.0V/30.0V/60.0V P-14 Absorption Time 2 0 4 0 : 1Min 1 : 1HR 2 : 2HR 3 : 3HR 4 : 4HR P-15 Float Voltage 2 0 4 0 : 13.3V/26.6V/53.2V 1 : 13.4V/26.8V/53.6V 2 : 13.5V/27.0V/54.0V 3 : 13.6V/27.2V/54.4V 4 : 13.7V/27.4V/54.8V P-16 Equalize Voltage 2 0 4 0 : 15.1V/30.2V/62.0V 1 : 15.2V/30.4V/61.6V 2 : 15.3V/30.6V/61.2V 3 : 15.4V/30.8V/60.8V 4 : 15.5V/31.0V/60.4V P-17 Software version Read only Note 1 : Aux.1/2 Contact function selection1(bit0) - Aux.1 /2Contact function selection 1(bit1) - battery status 25% Aux.1/2 Contact function selection 1(bit2) - battery statuts50% Aux.1/2 Contact function selection 1(bit3) - battery status75% Aux.1/2 Contact function selection 1(bit4) - battery stattus100% Aux.1/2 Contact function selection 1(bit5) - In Equalize Cycle Aux.1/2 Contact function selection 1(bit6) - SOLAR CHARGER action Aux.1/2 Contact function selection 1(bit7) - CHARGER action Note 2 : Aux.1/2 Contact function selection 2(bit0) – AC IN action Aux.1/2 Contact function selection 2 (bit1) – BYPASS action 18 Aux.1/2 Contact function selection 2 (bit2) – AC OUT action Aux.1/2 Contact function selection 2 (bit3) – INVERTER action Aux.1/2 Contact function selection 2 (bit4) – Over Temperature Aux.1/2 Contact function selection 2 (bit5) – Over Load Aux.1/2 Contact function selection 2 (bit6) – Battery Low/High Aux.1/2 Contact function selection 2 (bit7) – STOP
What is the function of Inverter?..... Best Answer: An inverter is an electrical device that converts direct current (DC) to alternating current (AC); the resulting AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Static inverters have no moving parts and are used in a wide range of applications, from small switching power supplies in computers, to large electric utility high-voltage direct current applications that transport bulk power. Inverters are commonly used to supply AC power from DC sources such as solar panels or batteries. The primary function of an inverter is to convert Direct Current (DC) power into standard, Alternating Current (AC). This is because, whereas AC is the power supplied to industry and homes by the main power grid or public utility, the batteries of alternating power systems store only DC power. Moreover, virtually all household appliances and other electrical fixtures and equipment depend solely on AC power to perform. What is an inverter? Photo of a typical power inverter made by Xantrex/Trace Engineering. Photo: A typical electricity inverter. This one is made by Xantrex/Trace Engineering. Photo by Warren Gretz courtesy of US Department of Energy/NREL (DoE/NREL). One of Tesla's legacies (and that of his business partner George Westinghouse, boss of the Westinghouse Electrical Company) is that most of the appliances we have in our homes are specifically designed to run from AC power. Appliances that need DC but have to take power from AC outlets need an extra piece of equipment called a rectifier, typically built from electronic components called diodes, to convert from AC to DC. An inverter does the opposite job and it's quite easy to understand the essence of how it works. Suppose you have a battery in a flashlight and the switch is closed so DC flows around the circuit, always in the same direction, like a race car around a track. Now what if you take the battery out and turn it around. Assuming it fits the other way, it'll almost certainly still power the flashlight and you won't notice any difference in the light you get—but the electric current will actually be flowing the opposite way. Suppose you had lightning-fast hands and were deft enough to keep reversing the battery 50–60 times a second. You'd then be a kind of mechanical inverter, turning the battery's DC power into AC at a frequency of 50–60 hertz. Of course the kind of inverters you buy in electrical stores don't work quite this way, though some are indeed mechanical: they use electromagnetic switches that flick on and off at high speed to reverse the current direction. Inverters like this often produce what's known as a square-wave output: the current is either flowing one way or the opposite way or it's instantly swapping over between the two states: Diagram of simple square wave pattern. These kind of sudden power reversals are quite brutal for some forms of electrical equipment. In normal AC power, the current gradually swaps from one direction to the other in a sine-wave pattern, like this: Diagram of simple sine wave pattern. Electronic inverters can be used to produce this kind of smoothly varying AC output from a DC input. They use electronic components called inductors and capacitors to make the output current rise and fall more gradually than the abrupt, on/off-switching square wave output you get with a basic inverter. Inverters can also be used with transformers to change a certain DC input voltage into a completely different AC output voltage (either higher or lower) but the output power must always be less than the input power: it follows from the conservation of energy that an inverter and transformer can't give out more power than they take in and some energy is bound to be lost as heat as electricity flows through the various electrical and electronic components. In practice, the efficiency of an inverter is often over 90 percent, though basic physics tells us some energy—however little—is always being wasted somewhere! How does an inverter work? We've just had a very basic overview of inverters—and now let's go over it again in a little bit more detail. Imagine you're a DC battery and someone taps you on the shoulder and asks you to produce AC instead. How would you do it? If all the current you produce flows out in one direction, what about adding a simple switch to your output lead? Switching your current on and off, very rapidly, would give pulses of direct current—which would do at least half the job. To make proper AC, you'd need a switch that allowed you to reverse the current completely and do it about 50‐60 times every second. Visualize yourself as a human battery swapping your contacts back and forth over 3000 times a minute. That's some neat fingerwork you'd need! In essence, an old-fashioned mechanical inverter boils down to a switching unit connected to an electricity transformer. If you've studied our article on transformers, you'll know that they're electromagnetic devices that change low-voltage AC to high-voltage AC, or vice-versa, using two coils of wire (called the primary and secondary) wound around a common iron core. In a mechanical inverter, either an electric motor or some other kind of automated switching mechanism flips the incoming direct current back and forth in the primary, simply by reversing the contacts, and that produces alternating current in the secondary—so it's not so very different from the imaginary inverter I sketched out above. The switching device works a bit like the one in an electric doorbell. When the power is connected, it magnetizes the switch, pulling it open and switching it off very briefly. A spring pulls the switch back into position, turning it on again and repeating the process—over and over again. Simple animation illustrating the concept of a DC to AC power inverter Animation: The basic concept of an electromechanical inverter. DC feeds into the primary winding (pink zig-zag wires on the left side) of a toroidal transformer (brown donut), through a spinning plate (red and blue) with criss-cross connections. As the plate rotates, it repeatedly switches over the connections to the primary winding, so the transformer is receiving AC as its input instead of DC. This is a step-up transformer with more windings in the secondary (yellow zig-zag, right-hand side) than the primary, so it boosts a small AC input voltage into a larger AC output. The speed at which the disk rotates governs the frequency of the AC output. Most inverters don't work anything like this; this simply illustrates the concept. An inverter set up this way would produce a very rough square wave output. Types of inverters If you simply switch a DC current on and off, or flip it back and forth so its direction keeps reversing, what you end up with is very abrupt changes of current: all in one direction, all in the other direction, and back again. Draw a chart of the current (or voltage) against time and you'll get a square wave. Although electricity varying in that fashion is, technically, an alternating current, it's not at all like the alternating current supplied to our homes, which varies in a much more smoothly undulating sine wave). Generally speaking, hefty appliances in our homes that use raw power (things like electric heaters, incandescent lamps, kettles, or fridges) don't much care what shape wave they receive: all they want is energy and lots of it—so square waves really don't bother them. Electronic devices, on the other hand, are much more fussy and prefer the smoother input they get from a sine wave. This explains why inverters come in two distinct flavors: true/pure sine wave inverters (often shortened to PSW) and modified/quasi sine wave inverters (shortened to MSW). As their name suggests, true inverters use what are called toroidal (donut-shaped) transformers and electronic circuits to transform direct current into a smoothly varying alternating current very similar to the kind of genuine sine wave normally supplied to our homes. They can be used to power any kind of AC appliance from a DC source, including TVs, computers, video games, radios, and stereos. Modified sine wave inverters, on the other hand, use relatively inexpensive electronics ( thyristors, diodes, and other simple components) to produce a kind of "rounded-off" square wave (a much rougher approximation to a sine wave) and while they're fine for delivering power to hefty electric appliances, they can and do cause problems with delicate electronics (or anything with an electronic or microprocessor controller). Also, if you think about it, their rounded-off square waves are delivering more power to the appliance overall than a pure sine wave (there's more area under a square than a curve), so there's some risk of overheating with MSW inverters. On the positive side, they tend to be quite a bit cheaper than true inverters and often work more efficiently (which is important if you want to run something off a battery with a limited charge—because it will run for longer). Although many inverters work as standalone units, with battery storage, that are totally independent from the grid, others (known as utility-interactive inverters or grid-tied inverters) are specifically designed to be connected to the grid all the time; typically they're used to send electricity from something like a solar panel back to the grid at exactly the right voltage and frequency. That's fine if your main objective is to generate your own power. It's not so helpful if you want to be independent of the grid sometimes or you want a backup power source in case of an outage, because if your connection to the grid goes down, and you're not making any electricity of your own (for example, it's night-time and your solar panels are inactive), the inverter goes down too, and you're completely without power—as helpless as you would be whether you were generating your own power or not. For this reason, some people use bimodal or birectional inverters, which can either work in standalone or grid-tied mode (though not both at the same time). Since they have extra bits and pieces, they tend to be more bulky and more expensive. Nikola Tesla, black and white wood engraving c.1906 Caption: Nikola Tesla. Although he won the war of the currents, his rival Thomas Edison is still remembered as the pioneer of electric power. Wood engraving of Tesla by Sarong, c.1906, courtesy of US Library of Congress. What are inverters like? Inverters can be very big and hefty—especially if they have built-in battery packs so they can work in a standalone way. They also generate lots of heat, which is why they have large heat sinks (metal fins) and often cooling fans as well. As you can see from our top photo, typical ones are about as big as a car battery or car battery charger; larger units look like a bit like a bank of car batteries in a vertical stack. The smallest inverters are more portable boxes the size of a car radio that you can plug into your cigarette lighter socket to produce AC for charging laptop computers or cellphones. Just as appliances vary in the power they consume, so inverters vary in the power they produce. Typically, to be on the safe side, you'll need an inverter rated about a quarter higher than the maximum power of the appliance you want to drive. That allows for the fact that some appliances (such as fridges and freezers or fluorescent lamps) consume peak power when they're first switched on. 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Nagar best solar inverter for home in chennai - Tondiarpet High Road best solar inverter for home in chennai - Tambaram, K.K.Nagar best solar inverter for home in chennai - Ramasamy Salai best solar inverter for home in chennai - Anna Nagar best solar inverter for home in chennai - Thiruninravur. Product Descriptions Luminous Solar is a powerful hybrid inverter with 30 Amp inbuilt charge Controller. It is India's most intelligent solar system which gives priority to solar power use to save on electricity bills. The Solar Inverter charges the battery from grid and Solar panel both. If Sun energy is available then It charges the battery from solar Panel and if Solar is not available, then the inverter charges the battery from Mains/Grid. It can charge the battery and supply solar power to connected load if solar generation is sufficient otherwise it gives first priority to solar battery charging and then supply additional power to connected loads. Key Features- First of its kind Home UPS that delivers both AC & DC output Up to 600 Watt PV Module solar panel compatibility Intelligent fuzzy logic technology hepls in saving of electricity from 1.5 to 3 unit a day. Pure Sine wave output provides better performance & safety to the output load. Product Descriptions Key Feature Solar hybrid Inverter with inbuilt 30 amp PWM Charge controller Running Load 3 CFL, 3 Tube light, 3 Ceiling Fan, 1 Television Battery Support All Brands & All Types Battery System Single battery / 12V Weight 12 Kg. Dimension in CM 37 * 31 *13 Technical Details Wave Type Pure Sine Wave Rated Capcity 850 VA Voltage Windwo (eco mode): 100 V – 290V Voltage window (UPS mode) 180V – 260 V Full Battery Recharge Time 10-12 Hrs Charge Controller Rating 30 Amp/ 12V DC Load Output 12 V upto 20 Amp Protection Overload, deep discharge, short-circuit, Battery low cut off Additional Features Battery Selection Type – Tubular/ Flat / Gel or VLRA Charging selection type – Intelligent charging / Normal Charging Voltage regulation mode – Eco / UPS Inverter reset key - Yes Display Mains available - yes Battery Charging through Mains - yes Battery Charging through Solar Panel – yes Voltage regulation display – yes Power savings - yes Load output through Battery - yes Low Battery Indication – yes Overload Indication – yes Recommendations Solar Panel Solar Panel wattage = Daily Power requirement / (Average Sunlight hours in a day * efficiency of the system) Let’s say, daily power requirement = 500 Watt /hour Average sunlight hour = 5 hrs Efficiency of the system = 35% Now the solar panel wattage requirement = 500 Wh / (5 hrs*0.35) = 300 Watt Battery 12V / (135 Ah – 180Ah) Everything you need to know before purchasing a Solar home inverter system Sujith 10/12/2013 8 SHARES Share on FacebookTweet on Twitter In Indian scenario if you are planning to install Home Solar energy plant to save your electricity bill, then you are doing a big blunder. It’s better to invest that amount in a good mutual fund or as a long term fixed deposit, you will be able to pay the electricity bill with the return/interest from that amount. However if you are in a place where power failure is more frequent then it’s a good option First and foremost thing before going for a Solar power plant is the knowledge about your load. Don’t think about running Electric motors, Refrigerators, Air conditioners etc in a Solar power plant. However if you want a completely off the grid solution for multiple reasons, can go for high capacity plants (2 KW to 5 KW) . In normal domestic usage consider the light loads like Fan, TV, Music Systems, Lights etc. More the number of appliances less the backup time, hence it is better to keep the appliances minimum and tap the maximum backup time from the plant. DC Only Solar Energy System. For a small family I personally suggest DC Only Solar system. As the name suggests in this system all appliances are directly working on DC. Before going for such a system, you must take care of your requirements. Here if we take only the Lights and Fans (The most essential load), the system will be more economical. If your requirement is to run one or two fans and two to three lights, then go for this system. A complete DC Solar energy system in this setup will cost you only Rs 25, 000 to 35, 000 including the cost of Battery, DC Fans and Lights. Here the main advantage is you can completely avoid inverter and the energy loss due to the energy conversion. However if you want to run your TV, Music system and other appliances forget about this and go for the inverter based solar power plant. SOLAR INVERTERS Solar inverters are the heart of a solar plant. It is very much important to know the basic features and specifications of a Solar inverter. Capacity: Capacity of the inverter is the maximum load that you can be connected with the inverter. For example if the capacity of a Solar inverter is 1 Kilowatt, you can connect maximum 1 KW load to that inverter. 1 Kilowatt is considered sufficient for average home usage. If money permits, you can go upto 2KW also, anything beyond that for home usage won’t be economical. Output: Don’t compromise on the output waveform of the inverters. It must be Sine wave. Fortunately most of the leading solar inverter firms are supplying sine wave inverters only in solar segment. Other features: Unlike normal inverters, solar inverters have many unique features to make it more energy efficient and to tap the maximum benefits from the solar panels. Maximum Solar energy benefit: Solar inverters charge battery bank with the power output from Solar panels during daytime. A typical 1 Kilowatt Home solar power plant takes five to six hours for charging the battery. If you are not completely drain out the battery during night time, it will take much less time to charge the battery full during the next day. Once the battery gets fully charged in one or two hours, in normal solar inverters rest of the useful solar energy will be wasted. In some solar inverters once the battery is fully charged, the power conditioning circuitry automatically cut the mains supply and Solar Panel battery combination will power the devices through inverter. Here during daytime effective and full utilization of solar power can be achieved. Metering: Apart from the battery charging status, power on/off, battery low, mains on/off indications, modern solar inverters are incorporated with energy meters which logs the energy usage from solar panels/mains, net daily/monthly energy usage etc. Programmable Controls: Modern solar inverters facilitates programmable energy control system. Here you can effectively decide what energy should be used when. How solar inverters differ from normal inverters? Inverter portion of both solar an normal inverters are same. In solar inverters the additional part is solar charge controller and associated switching circuits. Apart from the battery terminals solar inverters have two additional terminals to connect solar panels of suitable rating. Whenever sufficient sunlight is available, the output from solar panel will be utilized for charging the battery, which can brings down your electricity bill. image Is it possible to convert a normal inverter to a solar inverter? Yes, you can convert a normal inverter to a Solar inverter. Several firms are offering Solar Charge Controllers along with Automatic Transfer Switch which can couple the Solar panels with your existing inverter and battery. You just need to connect the Device as per the connection details. image When sufficient output available from Solar panels to charge the battery, it will be sensed by the intelligent automatic transfer switch and routed to battery. In this time mains supply will not be utilized for charging purpose. Whenever the solar output falls below the rated voltage, mains input from inverter will be used for battery charging. What is grid tied solar inverters? Grid tied inverters are coupled to main utility grid. Here the DC output from solar panel is converted to AC and coupled with the grid through a special type of energy meter known as Netmeter. Unlike normal energy meters, net meters are bi-directional. Here the solar energy is used as a supplement to the grid power. Grid tied inverters convert the DC power input from Solar panels to AC and feed the same to utility grid through Netmeter. If your solar panel is generating more energy than your domestic requirement, the excess energy will be credited to the grid, means you can sell the energy to the utility grid. Here grid tied inverters can not be used as a backup device as in the case of off line inverters. When mains grid power fails, as a safety measure inverter will not generate electricity. A circuit senses the power failure and cut off the inverter from main grid . This avoid risk to the line workers. In India you can’t use these type of inverters because the grid system is not yet modified for this. Pros and Cons of Grid tied inverter Less maintenance as not battery or charging circuits are used. Bring down your electricity bill by feeding the excess power to grid. Cons Can’t be used as a backup to main supply. Can’t use everywhere. Utility grid of the country must support these type of inverters. What is a solar- wind hybrid inverter? Solar- Wind hybrid inverters have separate input terminals to tap the energy from wind turbine and Solar panels. Charge controllers and regulators of Solar and wind turbines are different, hence separate charge controllers, regulators and associated switching circuits work as a bridge. Can I use solar panel output directly to run devices? Yes, you can run the equipment like fans, LED lights, pumps etc directly without using battery, but as the output of Solar panels are not steady due to clouds, bad weather etc, it’s not advisable to run the appliances which require stable voltage. However with suitable regulators, you can very easily run low power devices. Solar pumps works directly on the direct input from Solar panels. Solar pump is a combination of a DC motor and a centrifugal pump. Solar submersible pump sets are also available. Solar pump sets are extremely useful where Grid power supply is not accessible. In India a typical 1 HP , 500 W input 24 volt solar pumpset costs 35000 to 40000 without the cost of Solar panel and fittings. A complete set can cost around Rs 1 Lakh. These pump set can deliver around 1500 liters of water per hour on sunny days. Power requirements and Solar Panel Selection Here the deciding factor is your average monthly/yearly energy consumption. It can be very easily calculated by using your one year’s electricity bill. Your winter and summer electricity requirements considerably varies hence the average electricity usage of of the whole year can give a fair usage value. If your average monthly usage is 150 Units, then the daily usage is 150/30 = 5 Units or 5 KWh, means at an average you need 5 Kilo Watt hour energy. Now you have to calculate the size (wattage) of the Solar panels required to meet this energy requirement. Here one thing you must keep in mind that, distribution or availability of solar energy is depends on the geographical locations. The usable hours of solar energy available varies from point to point. Isolation map indicates the average monthly/yearly availability of usable sunlight . Here see the Solar Resources map indicates average annual sunlight hours available across various places in India (prepared by Ministry of New and Renewable Energy – Govt of India ) image From the map let’s take an average value of 5 sunlight hours per day. Now we can use the formula Solar panel Wattage = Daily Power requirement / (Average Sunlight Hours x Efficiency of the system) In our case daily power requirement = 5 KWh Average Sunlight Hours = 5 hrs Efficiency of the system = say 80% = 0.8 (Here the conversion losses of inverters, solar charge controllers, battery and wiring are taken ) Now The solar panel wattage requirement = 5/(5×0.8)= 1.25Kilo Watts Per day. This indicates you need 1.25 KW solar panels to meet your complete energy requirements. Solar panels are available in different Wattage/Voltage combinations. Normally low wattage panels (Upto 100Watts) comes with 12 Volt output and High Wattage panels comes with 24 Volts output. If your inverter is above 1 KV, naturally the input battery requirement will be 24 Volts or 48 Volts. In the above quoted example you can use Six to Seven 200 Watts Solar panels are required to generate 1.25 KW power for your complete energy requirement. Solar panels wiring You won’t get a single solar panel to meet the whole power requirement, for that you have to use the suitable combination of multiple panels as per the specification of your system. image As a source of energy, solar panels work as battery. In series connection the voltage of individual panels get added up and current (Wattage) Remains same. For example if you connect two 100 Watts 12 Volt solar panels in series (Positive terminal of the first panel to the negative terminal of second panel) , the net voltage will be 24 Volts but the power remains same (100Watts). In parallel combination of panels the current/wattage added up and the voltage remains same. If you connect two 100 Watts 12 Volt Solar panels in parallel (Positive terminal of first panel to positive terminal of second panels and negative terminal to negative terminal) the power/current get added up and voltage remains same means the net wattage of panels will be 200 Watts 12 Volt. You can use series- parallel combination of multiple panels to meet desired voltage and power requirement. See the figure. If you are planning to install a 1 Kilo Watt plant, then have to go for Five 200 Watts 12 Volts panels and connect the same in parallel. One important thing you must keep in mind that a 200 Watt panel cannot give exact 200 Watt power always. The rated power inscribed on the panel is on Standard Testing Conditions, in practical field conditions, it can go down. Standard Test Conditions indicates mainly the Standard Temperature (25 Degree Celsius) and Solar energy intensity (1000 W/Sq Mtr). Temperature Coefficient of Solar Panels: Power output from Solar panel varies according to the temperature. Normally a 200 Watts Solar panel give the rated output at 25 Degree Celsius. If temperature go above this point say 30 to 35 Degree, power output reduces accordingly. Excessive heat can reduce the output by 10 to 20%. If the temperature coefficient is marked as minus 0.5% per degree in a Solar panel, it indicates the power reduction of 0.5% on every degree raise in temperature over 25 Degree Celsius. In a sunny day if the temperature goes around 45 Degree Centigrade, the power output will be reduced by 10%. Conversely, if temperature come down below 25 Degree, the opposite action take places, means power increases according to the same ratio. Means in the sunny day of winter, a Solar panel will give its optimum output. Power Tolerance of Solar Panels Power tolerance of a Solar Panel is the range of upward or downward variation of power generated with respect to the Standard Power Output. For example, a 250-watt panel with a ±5% power tolerance means under standard test conditions the power generated by the solar panels varies from 237.5 Watts to 262.5 Watts. Go for a panel with minimum power tolerance ratings. Nowadays panels with 3% power tolerance level are available in market. Types of Solar Panels Solar panels are mainly classified in to three . Monocrystaline panels Polycrystalline Panels Thin Film Amorphous panels Monocrystalline Solar Panels Single Crystalline Solar panels of Mono Crystalline Solar panels are the panels which are made of Mono Crystalline Silicon. These panels can be identified by the physical appearance itself. Due to high purity of Silicon colour of these panels are dark blue. Mono Crystalline panels are made of the Wafers sliced from the cylindrical Silicon ingots. See the figure. Mono Crystalline Solar Panel Advantages and Disadvantages of Mono Crystalline Solar Panels. Advantages As Monocrystalline solar panels are made with pure grade of Silicon, efficiency of these type these type of panels are very high, typically 15 to 20%. Less space required. As compared to other type of panels Mono Crystalline panels are space efficient. For a specified power output, space required by these panels are considerably less than thin film and Poly Crystalline panels. Long life- Life of the Mono crystalline panels are very high as compared with other type of panels. Better performance in cooler conditions Disadvantages Mono Crystalline Panels are costly because of high production cost. Partial shading on Mono Crystalline Panels may leads complete power cutoff. Polycrystalline Panels These type of panels use multi crystalline Silicon . Here the raw silicon is melted and molded to make square wafers. Here multiple small crystals make a module. We can identify the Poly Crystalline Solar panels through the physical appearance. Bluish shade distinguish poly crystalline panels from mono crystalline panels . Unlike mono crystalline panels these panels don’t have cut edges. These type of Solar panels are most common in domestic usage. Poly Crystalline Solar PanelsAdvantages Poly Crystalline Solar Panels Due to less production cost, Poly Crystalline Solar Panels are comparatively cheaper. Comparatively better performance in hot conditions Good life span. Disadvantages Less efficient than Mono Crystalline Panels. Not space efficient as compared with Mono Crystalline Panels. More space required for the same rated power. Thin Film Amorphous Solar Panels Thin film solar panels are of relatively new technology solar panels. These type of panels consist of layers of photovoltaic materials about 10 nm thick compared with 200- to 300-nm layers for crystalline-silicon cells. Due to poor efficiency these type of panels are not used for home solar energy applications. Moreover area per wattage requirements of these panels are very high as compared with mono/poly crystalline panels. Type of Mountings You must take extreme care while selecting the panel mounting. Vendors may supply substandard mild steel mounting, which will be rusted rusted and collapsed within a couple of years. You have the choice of Powder coated Mild steel, Galvanized Mild Steel, Aluminium and Stainless steel mountings. Need not to mention that Stainless steel and Aluminium mountings are the best , especially if you are living in coastal area. Batteries for Solar power plant Battery requirement of a Solar power plant is depends upon the Solar Panel wattage and inverter capacity. A 1 Kilowatt solar power plant requires an inverter with a power rating of minimum 1 Kilowatt or more. For a 1 Kilowatt inverter, the operating voltage will be 24 Volts. Hence minimum two 12 Volts batteries in series connection is mandatory. More number of batteries will give more backup, but it requires more charging time too. For a typical 1 Kilowatt Solar home power plant 24 Volts 300 Ah battery bank is considered ideal. Normally Valve Regulated Lead Acid batteries (VRLA) are used in home solar power plants. These batteries are of deep discharge type designed to charge rapidly and can be discharged utpo the minimum level. Normal Automotive lead acid batteries are not suitable for solar inverters. If you are worried about the maintenance of the battery bank, then it is advisable to go for maintenance free sealed lead acid batteries. Cost of SMF batteries are a little bit higher than normal VRLA and tubular batteries. How and where to position solar panels? To get the maximum output from solar panels, it must be positioned at a suitable angle as per the geographical location. Earth’s position of sun varies through out the year, but changing the angle of Solar panels Every time in accordance that is not practicable. If you have a fixed mount, it is advisable to fix the panels at an angle which gives optimum output throughout in al seasons. For getting complete sunlight from sun’s East to West track, solar panels are required to be mounted south facing with angle of tilt as per the season. Life of Solar panels We can see 25 years warranty claims come with every solar panels. This 25 years warranty is a gimmick. Solar panels can live even many more years than this 25 years mark, but the question you must ask after few years say five years how much power it can give. This is the actual warranty/guarantee term. Normally output of Solar panels decreases due to ageing and other environmental factors. Some manufactures assure 99 to 100% output utpo first 10 years. The assurance of 80% power output after 25 years can not be considered as a benchmark. A panel which guarantees 100% power output will be superior than that one. As per MNRE specifications A solar panel must give minimum 90% output upto 10 years and 80% output after 25 Years. Normally the extent of guarantee is the Replenishment of lost power due to ageing only. Space requirement for a home solar power plant For a typical 1 Kilowatt Solar power plant, minimum 100 Square feet shadow free plane area is essential. It can be roof top also. Size of the solar panels varies as per the wattage rating of Solar panels. A 200 watt poly crystalline panel has a dimension of 1.5 Mtr x 1 Mtr x 1 Inch (Length x Width x Thickness). Cost of the panel varies from Rs 60 to 100 per watts. Solar Calculator Applications These Android application will help you to decide the size of home solar power plant as per your energy requirement. https://play.google.com/store/apps/details?id=uk.co.networkadvice.solarcalc& feature=search_result https://play.google.com/store/apps/details?id=com.vistechprojects.solarmeter& feature=search_result At an average how much energy I will get from a 100 Watt solar panel per year? A 100 Watts panel can give maximum 0.5 unit electricity per day. Means per month 15 Units per month. A 1 Kilowatt Solar plant can give 4 to 5 Unit electricity per day. Solar panel efficiency Efficiency – the ration of input solar energy to output electric energy is very much poor in world’s most efficient solar panel. In lab environments maximum achieved energy efficiency is 40% only, but which is far away from the real world situations. Practically the efficiency of off the shelf solar panels varies from 15 to 20% only. What is solar charge controller? Solar charge controller or charge regulator is an essential requirement for a solar energy system. Output from a 100W 12 V solar panel is not always 12 V through out the day. It varies from minimum 12 Volts to Maximum 18 Volt as per the sunlight. Means a 100 Watt Solar panels is designed to cater 100Watt power at an average. Solar charge controllers couples the solar panels with battery by regulating the fluctuating output from solar panels. A good charge controller prevent under and over charging of connected batteries. It prevents the reverse current flow from battery to panels under poor sunlight conditions and night. Additionally charge controllers give protection against battery and panel reverse polarity. Will solar panels work in cloudy, foggy and rainy seasons? Yes, Solar panels work in such bad light conditions also. Solar panels are designed to give the rated output even in poor sunlight conditions also. Here panels give more output than the rated value in good sunlight conditions. What is Solar tracking system? Is it necessary for me? Sun light has two components, direct and diffused. Here direct beam consists 90% of the solar energy. Solar tracker is a mechanical system which keeps the solar panels always facing towards sun . This will increase the overall efficiency of the plant by taping the optimum energy. For normal home solar energy plants, trackers are not necessary and it’s not value for money also. However in big solar plants (Mega watts range) it’s mandatory to extract the full benefit of the system. Can I expand the capacity of the plant by adding more panels in future? Yes you can, your inverter must be compatible for that with suitable ratings. Roof mounting or Ground mounting. Which one is more advisable? Normally people prefer roof mounting because of space constraints and availability of shadow free area. If you have sufficient space in ground, you can install the panels in ground also. In case of roof mounting, the roof must be strong enough to withstand the weight of mounting frame and panels apart from that, it must sustain strong wind also. How to get govt subsidies on Solar systems? Central Govt and State Govt give subsidies for solar energy systems. Normally you will get 30% of the total amount as Central Govt subsidy. Before installing the plant you must apply for that in prescribed format. One thing you must keep in mind that, it will be difficult to get the subsidy after installation without prior approval from the concerned agencies. You have to purchase the items from the MNRE (Ministry of New and Renewable energy) empanelled vendors only. List of Manufacturers empanelled under Capital Subsidy scheme implemented through NABARD (as on 16-06-2013). The list contains contact numbers of all approved vendors across various parts of India. Even though you don’t want to get the subsidy, it is highly advisable to get the system installed from these vendors because they strictly comply with the necessary performance and technical standards. State Nodal Agencies for Minister of New and Renewable Energy (MNRE) Go through this list to get the contact information of State wise Nodal centres of MNRE. You must contact the regional/district nodal centres before installing a solar home power plant. Apart from the 30% Central Govt subsidy, many state govts offer additional subsidies and other special schemes to promote alternate energy usage.
A solar inverter, or converter or PV inverter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is a critical balance of system (BOS)–component in a photovoltaic system, allowing the use of ordinary AC-powered equipment. Solar power inverters have special functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection. Contents [hide] 1 Classification 2 Maximum power point tracking 3 Solar micro-inverters 4 Grid tied solar inverters 5 Solar charge controller 6 Solar pumping inverters 7 Market 8 See also 9 References Classification[edit] Simplified schematics of a grid-connected residential photovoltaic power system[1] Solar inverters may be classified into three broad types:[2] Stand-alone inverters, used in isolated systems where the inverter draws its DC energy from batteries charged by photovoltaic arrays. Many stand-alone inverters also incorporate integral battery chargers to replenish the battery from an AC source, when available. Normally these do not interface in any way with the utility grid, and as such, are not required to have anti-islanding protection. Grid-tie inverters, which match phase with a utility-supplied sine wave. Grid-tie inverters are designed to shut down automatically upon loss of utility supply, for safety reasons. They do not provide backup power during utility outages. Battery backup inverters, are special inverters which are designed to draw energy from a battery, manage the battery charge via an onboard charger, and export excess energy to the utility grid. These inverters are capable of supplying AC energy to selected loads during a utility outage, and are required to have anti-islanding protection. Maximum power point tracking[edit] Main article: Maximum power point tracker Solar inverters use maximum power point tracking (MPPT) to get the maximum possible power from the PV array.[3] Solar cells have a complex relationship between solar irradiation, temperature and total resistance that produces a non-linear output efficiency known as the I-V curve. It is the purpose of the MPPT system to sample the output of the cells and determine a resistance (load) to obtain maximum power for any given environmental conditions.[4] The fill factor, more commonly known by its abbreviation FF, is a parameter which, in conjunction with the open circuit voltage (Voc) and short circuit current (Isc) of the panel, determines the maximum power from a solar cell. Fill factor is defined as the ratio of the maximum power from the solar cell to the product of Voc and Isc.[5] There are three main types of MPPT algorithms: perturb-and-observe, incremental conductance and constant voltage.[6] The first two methods are often referred to as hill climbing methods; they rely on the curve of power plotted against voltage rising to the left of the maximum power point, and falling on the right.[7] Solar micro-inverters[edit] Main article: Solar micro-inverter A solar micro-inverter in the process of being installed. The ground wire is attached to the lug and the panel's DC connections are attached to the cables on the lower right. The AC parallel trunk cable runs at the top (just visible). Solar micro-inverter is an inverter designed to operate with a single PV module. The micro-inverter converts the direct current output from each panel into alternating current. Its design allows parallel connection of multiple, independent units in a modular way.[8] Micro-inverter advantages include single panel power optimization, independent operation of each panel, plug-and play installation, improved installation and fire safety, minimized costs with system design and stock minimization. A 2011 study at Appalachian State University reports that individual integrated inverter setup yielded about 20% more power in unshaded conditions and 27% more power in shaded conditions compared to string connected setup using one inverter. Both setups used identical solar panels.[9] Grid tied solar inverters[edit] See also: Grid-tie inverter Solar grid-tie inverters are designed to quickly disconnect from the grid if the utility grid goes down. This is an NEC requirement that ensures that in the event of a blackout, the grid tie inverter will shut down to prevent the energy it produces from harming any line workers who are sent to fix the power grid. Grid-tie inverters that are available on the market today use a number of different technologies. The inverters may use the newer high-frequency transformers, conventional low-frequency transformers, or no transformer. Instead of converting direct current directly to 120 or 240 volts AC, high-frequency transformers employ a computerized multi-step process that involves converting the power to high-frequency AC and then back to DC and then to the final AC output voltage.[10] Historically, there have been concerns about having transformerless electrical systems feed into the public utility grid. The concerns stem from the fact that there is a lack of galvanic isolation between the DC and AC circuits, which could allow the passage of dangerous DC faults to the AC side.[11] Since 2005, the NFPA's NEC allows transformer-less (or non-galvanically) inverters. The VDE 0126-1-1 and IEC 6210 also have been amended to allow and define the safety mechanisms needed for such systems. Primarily, residual or ground current detection is used to detect possible fault conditions. Also isolation tests are performed to ensure DC to AC separation. Many solar inverters are designed to be connected to a utility grid, and will not operate when they do not detect the presence of the grid. They contain special circuitry to precisely match the voltage, frequency and phase of the grid. Solar charge controller[edit] See also: Charge controller A charge controller may be used to power DC equipment with solar panels. The charge controller provides a regulated DC output and stores excess energy in a battery as well as monitoring the battery voltage to prevent under/over charging. More expensive units will also perform maximum power point tracking. An inverter can be connected to the output of a charge controller to drive AC loads. Solar pumping inverters[edit] Advanced solar pumping inverters convert DC voltage from the solar array into AC voltage to drive submersible pumps directly without the need for batteries or other energy storage devices. By utilizing MPPT (maximum power point tracking), solar pumping inverters regulate output frequency to control the speed of the pumps in order to save the pump motor from damage. Solar pumping inverters usually have multiple ports to allow the input of DC current generated by PV arrays, one port to allow the output of AC voltage, and a further port for input from a water-level sensor. Market[edit] As of 2014, conversion efficiency for state-of-the-art solar converters reached more than 98 percent. While string inverters are used in residential to medium-sized commercial PV systems, central inverters cover the large commercial and utility-scale market. Market-share for central and string inverters are about 50 percent and 48 percent, respectively, leaving less than 2 percent to micro-inverters.[12] Inverter/converter market in 2014 Type Power Efficiency(a) Market share(b) Remarks String inverter up to 100 kWp(c) 98% 50% Cost(b) €0.15 per watt-peak. Easy to replace. Central inverter above 100 kWp 98.5% 48% €0.10 per watt-peak. High reliability. Often sold along with a service contract. Micro-inverter module power range 90%–95% 1.5% €0.40 per watt-peak. Ease of replacement concerns. DC/DC converter Power optimizer module power range 98.8% N/A €0.40 per watt-peak. Ease of replacement concerns. Inverter is still needed. About 0.75 GWP installed in 2013. Source: data by IHS 2014, remarks by Fraunhofer ISE 2014, from: Photovoltaics Report, updated as per 8 September 2014, p. 35, PDF[12] Notes: (a)best efficiencies displayed, (b)market-share and cost per watt are estimated, (c)kWp = kilowatt-peak See also[edit] icon Renewable energy portal icon Energy portal Inverter (electrical) Off-the-grid References[edit] Jump up ^ Solar Cells and their Applications Second Edition, Lewis Fraas, Larry Partain, Wiley, 2010, ISBN 978-0-470-44633-1 , Section10.2. Jump up ^ "3 Types of Solar Inverters Explained". do it yourself. Retrieved 15 February 2017. Jump up ^ "Invert your thinking: Squeezing more power out of your solar panels". scientificamerican.com. Retrieved 2011-06-09. Jump up ^ Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques Jump up ^ Benanti, Travis L.; Venkataraman, D. (25 April 2005). "Organic Solar Cells: An Overview Focusing on Active Layer Morphology" (PDF). Photosynthesis Research. 87 (1): 77. doi:10.1007/s11120-005-6397-9. Retrieved 27 August 2013. Jump up ^ "Evaluation of Micro Controller Based Maximum Power Point Tracking Methods Using dSPACE Platform" (PDF). itee.uq.edu.au. Retrieved 2011-06-14. Jump up ^ "Comparative Study of Maximum Power Point Tracking Algorithms". doi:10.1002/pip.459. Jump up ^ http://dspace.mit.edu/bitstream/handle/1721.1/61308/702674669.pdf Jump up ^ "A SIDE-BY-SIDE COMPARISON OF MICRO AND CENTRAL INVERTERS IN SHADED AND UNSHADED CONDITIONS" (PDF). Retrieved 27 August 2013. Jump up ^ Photovoltaics: Design and Installation Manual. Newsociety Publishers. 2004. p. 80. Jump up ^ "Summary Report on the DOE High-tech Inverter Workshop" (PDF). Sponsored by the US Department of Energy, prepared by McNeil Technologies. eere.energy.gov. Retrieved 2011-06-10. ^ Jump up to: a b Fraunhofer ISE report , archived version as per September 2014 (archived PDF)A solar inverter, or converter or PV inverter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is a critical balance of system (BOS)–component in a photovoltaic system, allowing the use of ordinary AC-powered equipment. Solar power inverters have special functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection. Contents [hide] 1 Classification 2 Maximum power point tracking 3 Solar micro-inverters 4 Grid tied solar inverters 5 Solar charge controller 6 Solar pumping inverters 7 Market 8 See also 9 References Classification[edit] Simplified schematics of a grid-connected residential photovoltaic power system[1] Solar inverters may be classified into three broad types:[2] Stand-alone inverters, used in isolated systems where the inverter draws its DC energy from batteries charged by photovoltaic arrays. Many stand-alone inverters also incorporate integral battery chargers to replenish the battery from an AC source, when available. Normally these do not interface in any way with the utility grid, and as such, are not required to have anti-islanding protection. Grid-tie inverters, which match phase with a utility-supplied sine wave. Grid-tie inverters are designed to shut down automatically upon loss of utility supply, for safety reasons. They do not provide backup power during utility outages. Battery backup inverters, are special inverters which are designed to draw energy from a battery, manage the battery charge via an onboard charger, and export excess energy to the utility grid. These inverters are capable of supplying AC energy to selected loads during a utility outage, and are required to have anti-islanding protection. Maximum power point tracking[edit] Main article: Maximum power point tracker Solar inverters use maximum power point tracking (MPPT) to get the maximum possible power from the PV array.[3] Solar cells have a complex relationship between solar irradiation, temperature and total resistance that produces a non-linear output efficiency known as the I-V curve. It is the purpose of the MPPT system to sample the output of the cells and determine a resistance (load) to obtain maximum power for any given environmental conditions.[4] The fill factor, more commonly known by its abbreviation FF, is a parameter which, in conjunction with the open circuit voltage (Voc) and short circuit current (Isc) of the panel, determines the maximum power from a solar cell. Fill factor is defined as the ratio of the maximum power from the solar cell to the product of Voc and Isc.[5] There are three main types of MPPT algorithms: perturb-and-observe, incremental conductance and constant voltage.[6] The first two methods are often referred to as hill climbing methods; they rely on the curve of power plotted against voltage rising to the left of the maximum power point, and falling on the right.[7] Solar micro-inverters[edit] Main article: Solar micro-inverter A solar micro-inverter in the process of being installed. The ground wire is attached to the lug and the panel's DC connections are attached to the cables on the lower right. The AC parallel trunk cable runs at the top (just visible). Solar micro-inverter is an inverter designed to operate with a single PV module. The micro-inverter converts the direct current output from each panel into alternating current. Its design allows parallel connection of multiple, independent units in a modular way.[8] Micro-inverter advantages include single panel power optimization, independent operation of each panel, plug-and play installation, improved installation and fire safety, minimized costs with system design and stock minimization. A 2011 study at Appalachian State University reports that individual integrated inverter setup yielded about 20% more power in unshaded conditions and 27% more power in shaded conditions compared to string connected setup using one inverter. Both setups used identical solar panels.[9] Grid tied solar inverters[edit] See also: Grid-tie inverter Solar grid-tie inverters are designed to quickly disconnect from the grid if the utility grid goes down. This is an NEC requirement that ensures that in the event of a blackout, the grid tie inverter will shut down to prevent the energy it produces from harming any line workers who are sent to fix the power grid. Grid-tie inverters that are available on the market today use a number of different technologies. The inverters may use the newer high-frequency transformers, conventional low-frequency transformers, or no transformer. Instead of converting direct current directly to 120 or 240 volts AC, high-frequency transformers employ a computerized multi-step process that involves converting the power to high-frequency AC and then back to DC and then to the final AC output voltage.[10] Historically, there have been concerns about having transformerless electrical systems feed into the public utility grid. The concerns stem from the fact that there is a lack of galvanic isolation between the DC and AC circuits, which could allow the passage of dangerous DC faults to the AC side.[11] Since 2005, the NFPA's NEC allows transformer-less (or non-galvanically) inverters. The VDE 0126-1-1 and IEC 6210 also have been amended to allow and define the safety mechanisms needed for such systems. Primarily, residual or ground current detection is used to detect possible fault conditions. Also isolation tests are performed to ensure DC to AC separation. Many solar inverters are designed to be connected to a utility grid, and will not operate when they do not detect the presence of the grid. They contain special circuitry to precisely match the voltage, frequency and phase of the grid. Solar charge controller[edit] See also: Charge controller A charge controller may be used to power DC equipment with solar panels. The charge controller provides a regulated DC output and stores excess energy in a battery as well as monitoring the battery voltage to prevent under/over charging. More expensive units will also perform maximum power point tracking. An inverter can be connected to the output of a charge controller to drive AC loads. Solar pumping inverters[edit] Advanced solar pumping inverters convert DC voltage from the solar array into AC voltage to drive submersible pumps directly without the need for batteries or other energy storage devices. By utilizing MPPT (maximum power point tracking), solar pumping inverters regulate output frequency to control the speed of the pumps in order to save the pump motor from damage. Solar pumping inverters usually have multiple ports to allow the input of DC current generated by PV arrays, one port to allow the output of AC voltage, and a further port for input from a water-level sensor. Market[edit] As of 2014, conversion efficiency for state-of-the-art solar converters reached more than 98 percent. While string inverters are used in residential to medium-sized commercial PV systems, central inverters cover the large commercial and utility-scale market. Market-share for central and string inverters are about 50 percent and 48 percent, respectively, leaving less than 2 percent to micro-inverters.[12] Inverter/converter market in 2014 Type Power Efficiency(a) Market share(b) Remarks String inverter up to 100 kWp(c) 98% 50% Cost(b) €0.15 per watt-peak. Easy to replace. Central inverter above 100 kWp 98.5% 48% €0.10 per watt-peak. High reliability. Often sold along with a service contract. Micro-inverter module power range 90%–95% 1.5% €0.40 per watt-peak. Ease of replacement concerns. DC/DC converter Power optimizer module power range 98.8% N/A €0.40 per watt-peak. Ease of replacement concerns. Inverter is still needed. About 0.75 GWP installed in 2013. Source: data by IHS 2014, remarks by Fraunhofer ISE 2014, from: Photovoltaics Report, updated as per 8 September 2014, p. 35, PDF[12] Notes: (a)best efficiencies displayed, (b)market-share and cost per watt are estimated, (c)kWp = kilowatt-peak See also[edit] icon Renewable energy portal icon Energy portal Inverter (electrical) Off-the-grid References[edit] Jump up ^ Solar Cells and their Applications Second Edition, Lewis Fraas, Larry Partain, Wiley, 2010, ISBN 978-0-470-44633-1 , Section10.2. Jump up ^ "3 Types of Solar Inverters Explained". do it yourself. Retrieved 15 February 2017. Jump up ^ "Invert your thinking: Squeezing more power out of your solar panels". scientificamerican.com. Retrieved 2011-06-09. Jump up ^ Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques Jump up ^ Benanti, Travis L.; Venkataraman, D. (25 April 2005). "Organic Solar Cells: An Overview Focusing on Active Layer Morphology" (PDF). Photosynthesis Research. 87 (1): 77. doi:10.1007/s11120-005-6397-9. Retrieved 27 August 2013. Jump up ^ "Evaluation of Micro Controller Based Maximum Power Point Tracking Methods Using dSPACE Platform" (PDF). itee.uq.edu.au. Retrieved 2011-06-14. Jump up ^ "Comparative Study of Maximum Power Point Tracking Algorithms". doi:10.1002/pip.459. Jump up ^ http://dspace.mit.edu/bitstream/handle/1721.1/61308/702674669.pdf Jump up ^ "A SIDE-BY-SIDE COMPARISON OF MICRO AND CENTRAL INVERTERS IN SHADED AND UNSHADED CONDITIONS" (PDF). Retrieved 27 August 2013. Jump up ^ Photovoltaics: Design and Installation Manual. Newsociety Publishers. 2004. p. 80. Jump up ^ "Summary Report on the DOE High-tech Inverter Workshop" (PDF). Sponsored by the US Department of Energy, prepared by McNeil Technologies. eere.energy.gov. Retrieved 2011-06-10. ^ Jump up to: a b Fraunhofer ISE report , archived version as per September 2014 (archived PDF)
What is an Inverter? October 31st, 2013 | Posted in Electrical distribution Tags: alternating current, an inverter, direct current New series of tutorial by our mamber Nasir! This time, let him tell you about inverters. Here’s the 1st part. Introduction An inverter is an electrical device which converts DC voltage, almost always from batteries, into standard household AC voltage so that it is able to be used by common appliances. In short, an inverter converts direct current into alternating current. Direct current is used in many of the small electrical equipment such as solar power systems, since solar cells is only able to produce DC. They are also used in places where a small amount of voltage is to be used or produced such as power batteries which produce only DC. Other than these fuel cells and other power sources also produce DC. What is an Inverter Why to use an Inverter? But then the question which arises here is that why there is a need to covert direct Current to an alternating Current? The answer to this question is the simplest one. We all know that the main electricity supplied to our homes from the power stations is Alternating current at 220 Volts. That’s one main reason that the electrical equipment which require high voltages and currents are manufactured such that they work on AC since it is supplied to our homes. Other than this, AC power is widely used and since most of the appliances require a relatively higher amount of power than DC can supply, since DC power is designed to work on low voltages. So due to the reason that the power produced by DC producing devices has to be made available to our regular appliances, we need inverters now a days. What is an Inverter 2 Basic Types of Inverters During the conversion process, the voltage is also increased. But due to Ohms Law we know that an increase in voltage also leads to a decrease in current, so the overall output current is decreased when the DC Signal is converted into an AC one. Depending upon this working, there are two main types of inverters: Stand Alone Inverters Grid Tie inverters A small description of these inverters is given below so that you can know the basic difference in their working principles. In our later tutorials, they would be described the best possible detail. Stand Alone inverters These are the basic type of inverters, which along with the inversion of DC to AC, also produce increase the amplitude of the voltage and hence produce a change in the frequency. The output of these types of inverters is a sine wave usually, but in some cases the output gets distorted due to several reasons and appears in the form of a modified sine wave or a square wave. What is an Inverter 3 Grid Tie inverters In case of Grid Tie inverters, as their name indicates, the output AC power is supplied to a grid type network, i.e. a larger scale supply unit. Afterwards, through this unit, the power is distributed further. Due to this reason they have a complex construction and internal circuitry, because they have to synchronize with the grid network. These were the two basic types. The working of an inverter will be explained in the next tutorial. So stay tuned and keep visiting us to know their working in detail along with their principles and performance parameters. 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