How much energy do our appliances consume?
Appliance Wattage
Regular Tube Light (without Electronic ballast) 55
Tube Light (with Electronic ballast) 40
Tube Light (LED) 18
Regular Ceiling Fan - 1200 mm sweep (no Star rating) 75
Ceiling Fans - 1200 mm sweep (Star rated) 50
Super Efficient Fans - 1200 mm sweep 35
LCD TV < 43 inch 250
Sony BRAVIA HD LCD TV 32 inch (81 cm) Model: KLV-32BX350 101
Sony R412C BRAVIA LED TV 32 inch (80 cm) Model: KLV-32R412C 51
Sony W700C BRAVIA Internet LED TV 32 inch (80 cm) Model: KDL-32W700C 62
Standard CRT TV 150
Desktop Computer 150
Laptop Computer 100
Scanner 20
Inkjet Printer 30
Fridge / Freezer 150 - 400
Kitchen Mixie 400
Washing Machine 5 kg 500
AC - window 1 ton 1000
AC - window 1.5 ton 1500
AC - window 2 ton 1800
AC - split 1 ton 1600
AC - split 1.5 ton 1900
Motor - 1/4 HP 200
Motor - 1/2 HP 400
What are the advantages of Inverter Technology based Compressors used in Air Conditioners / Refrigerators?
Regular Inverter technology
Single speed, switches off when temperature stabilizes Variable speed, Never switches off, but runs at slower speed when temperature stabilizes
Inside temperature varies throughout Maintains inside temperature
Noise Much less noise
Designed to work at peak load always Works at peak capacity taking more electricity when cooling load is more and at less capacity when cooling load is less
Regular motors that need 3-4 times more than running current at start-up. High capacity inverter required to meet start up load Variable speed motors that start up gradually, needing much lesser current at start up. Lesser capacity inverter sufficient to meet start up load
1.5 ton fixed-speed AC that runs at about 10 Amp current may need upto 30 Amp current at start up; 5 KVA inverter required Inverter technology AC runs at about 6-7 Amp current and not much more at start up; 1.5-2 KVA inverter good enough
Regular motors have much lower power factor. In commercial & industrial connections, low power factor attracts penalty Inverter technology motors have power factor closer to 1, resulting in lesser electricity
If you plan to use solar PV for AC or refrigerator, then it is best to use inverter technology AC or fridge, as it saves both PV panels & inverter capacity.
What is a Solar Photovoltaic (SPV) System? How does it work?
  • A SPV system consists of a Photovoltaic Array mounted on a Stand, batteries, CCU, and other required equipment depending upon the size and requirement of power and current.
  • The Photovoltaic Array converts the solar energy into electricity, which is used for running the electrical equipments.
  • The electricity produced either stored in the Battery bank or directly used for running the electrical equipment.
What does it saves you? Who are eligible to own a Solar Photovoltaic System?
  • It operates on the freely available solar energy. Thus saves expenditure on diesel & electricity.
  • No fear of power cuts or scarcity of diesel.
  • It is trouble free, pollution free, has a long life and is reliable.
  • Unlike a diesel pump set, it does not produce noise.
  • It is easy to handle and operate.
  • An Individual, Non-Governmental Organization, Cooperative Society, Corporate Body, Institution and Govt. Dept. etc.
When do you need Batteries? When do you need Inverters?
If you require backup during power cuts, you will require batteries. If your load is AC (our lights, fan, TV, etc), you will require inverters.
What is an On-Grid Inverter? What is an Off-Grid Inverter?
  • It is an inverter, that works only when there is EB power.
  • It will not work, when there is NO EB power, even if there is solar power.
  • It is an inverter, that works even when there is NO EB power - but it requires batteries.
  • Because other than Solar power, Inverters require a reference voltage (either from the grid or from battery), to function.
What is our normal UPS solution? Are Solar Inverters different from normal UPS Inverters?
  • It is a normal inverter to support AC load, during power cuts. That is why we have batteries.
  • But the power to charge and recharge batteries is drawn from EB grid.
  • And more power we draw from batteries, the more we need to recharge.
  • That is why, electricity bill amounts tend to be higher, during peak power cut times.
  • Yes.
  • Solar Inverters have provision to connect Solar panels, which normal UPS inverters don't have.
Are Solar Batteries different from normal UPS Batteries? Can we have both Solar & Gen Sets as backups together?
  • Yes.
  • Solar batteries are designed to discharge in 10 hours, while UPS batteries are designed to discharge in 20 hours.
  • This means that, a 100 Ah Solar battery is designed to supply 10 Amps of current for 10 hours.
  • But a UPS battery of 100 Ah is designed to supply 5 Amps of current for 20 hours.
  • Solar batteries are designed to support double the load, overnight, than normal UPS batteres.
  • Yes, you can.
  • In fact that is the ideal choice for operations running 24x7.
What is a hybrid inverter?
  • The hybrid inverter system can direct power to a load or the grid if needed, or store it in batteries if not. It can also use power from the grid if needed.
  • There are also important design considerations when using hybrid inverters. For example, the battery bank voltage should be compatible with the DC input requirements of the inverter, and there should be enough solar capacity to supply the load as well as charge the batteries.
  • Wiring can also be more complex when using hybrid inverters, especially when panels are dedicated for critical backed-up loads.
  • Another segment of hybrid inverters includes inverters that can use two energy sources. For example, PV / wind hybrid inverters are available that can take inputs from both sources.

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