How Many Solar Panels to Run an Air Conditioner

Last Updated: July 20, 2020

Air conditioner & solar panels. How many solar panels to run the Air Conditioner?

You might be asking the same question to yourself as you want to get comfortable being staying fiscally stable this Summer.

Hot days are ahead and Air Conditioners will be your best friend. Summer is a favorite season of many people as they get a chance to go to beaches, vacations, etc. The season also increases AC’s demand.

AC, your Best Friend

Solar power is one of the finest ways that can mitigate your electricity cost as you use Air Conditioner excessive so let get straight into it;

How Many Solar Panels to Run the Air Conditioner

The short answer is the number of solar panels depends on which Solar Panels and Air Conditioner you have. So we’ll assume these to give you an idea.


A few factors determine how many solar panels you will require to run an Air Conditioner. They are following;

  • How much you use the Air Conditioner
  • The size of the Air Conditioner and Solar Panels
  • Efficiency, etc

Read more on Air Conditioner’s Efficiency

Every modern air conditioner and Solar panel should have a plate that tells their capacity, expenditures, specs, etc. The amount of power should be mentioned they draw or produce in watts so people can easily calculate how many kilowatt-hours your AC will consume and Solar Panels will produce. This calculation will help you prepare for solar.

I have to run a 1-ton air conditioner, how many panels will I need?

EER- Amount of heat removed in Watt/ power consumed in Watt.

Every 1 ton of cooling power (commonly known as heat removed by a 1 ton AC in one hour) is also expressed as 3516 watts. Hence 1.0 ton AC will be rated at least 3516 Watts.

New DEE Energy Efficiency Ratings (EER) for Room Air Conditioner

Input power wattage = Heat removed (watts) / EER. Ratings for various Star ratings:

  • 1 star – 1302 Watts
  • 2 star – 1212 Watts
  • 3 star – 1134 Watts
  • 4 star – 1065 Watts

Considering a 5 star split AC with 1-ton cooling capacity is rated for 3516 Watts, it will consume 1005 watts per hour

  • 1000 watts per hour is one unit of power consumed
  • Thus the AC will consume 1.005 units per hour
  • But compressor runs only 70 percent of the time during normal use. Hence adjusted power consumption will be 0.7 units per hour
  • Four 8 hours usage per day it will consume 5.6 units (Approximately)

For the above AC requirement, a 1.4 kW on-grid system is required as per thumb rule(4 units are generated from 1 kWp in a day). With 325 Wp solar module, no. of modules will be 1.4/0.325=4.307=5 nos(round-up).

Hence 1.625 kWp system would be required with 5 nos. of 325 Wp to run 5 stars 1 ton AC.

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