RAR Energy

How Many Solar Panels Needed to Run AC? A Complete Guide

In warmer climates specifically, many homes need air conditioning to be comfortable. Solar power is a practical and long-term answer for many homes running their air units as energy prices climb and people become more ecologically sensitive. This blog closely looks at how many solar panels are needed to run an AC, given the main factors influencing most people’s response: I wish to run an air conditioner with solar panels; How many solar panels do I need to run an air conditioner? Thus, here you are. 

How Many Solar Panels Do You Need to Run an Air Conditioner?

To correctly determine how many solar cells are needed, you must know how much power the AC unit uses. People usually judge air units by how well they cool and how much solar energy they use to run the air conditioner, shown in watts and British Thermal Units (BTUs). Usually, these tests determine how well an air conditioner cools and how much solar power the air conditioner draws. The watts number tells you how many solar panels the AC unit the device needs, and the BTU number tells you how much cooling it can do.  

Solar Panel Basics:

Watts are used to measure electricity. Solar panels are very good at turning sunlight into electricity. The amount of power a solar panel makes depends on its size and performance. Each panel usually takes between 250 and 400 watts. 

1. Peak Sun Hours:

This is important because the amount of sunlight a place gets affects how much solar panels produce. Peak sun hours are when the sun shines at an average of 1,000 watts per square meter. 

2. Efficiency: 

The amount of energy a solar panel can make from sunlight is based on how well it does this. Better panels give off more power per square inch. 

Factors Affecting Solar Panel Requirements:

How many solar panels to run an air conditioner are needed can change because of the following: 

  • The number of high-sun hours in a certain Geographic Location has a direct effect on the number of solar cells needed. 
  • A reduction in the number of panels is needed when panel efficiency goes up. 
  • You might want to add more solar cells if you always use your AC during the hottest parts of the day. 
  • When losses are high, you need more screens. 

Things That Matter:

  • Enough Space on the Roof: Make sure the roof can hold at least a few panels. 
  • Move and tilt the wall to get as much sun as possible. 
  • Take a look at the color. Consider any things that might cast shadows, like houses or trees. 
  • Putting batteries away could be an excellent way to power electronics when it’s cloudy or sunny outside. 

Example Calculations for Different Scenarios:

Case 1: A small air conditioner in a window 

Five thousand power BTUs, or 1,465 watts, can cool the air conditioner. It’s used for eight hours daily and uses 11.72 kWh of electricity daily. After a 20% loss in the system, it uses 14.06 kWh of electricity daily. 

The location gets five hours of peak sun every day. It can take 300 watts of power and gives off 1.5 kilowatt-hours of power every day. To determine the needed panels, divide 14.06 kWh by 1.5 kWh. This gives you about ten panels. 

Case 2: Air conditioner in the kitchen 

24,000 BTUs, the same as 7,032 watts, are enough to cool the room. Eight hours of daily use cost 56.26 kilowatt-hours, but if a 20% drop in power is considered, the new price is 67.51 kilowatt-hours. 

The location gets five hours of peak sun every day. It can take 300 watts of power and gives off 1.5 kilowatt-hours of energy daily. It takes about 45 panels, each with an average power of 1.5 kWh, to make 67.51 kWh. 

Financial Considerations:

The prices at the start cover the essential parts, such as solar panels, engines, installation, and maybe even roof strengthening. 

Two things that will save you money are the cost of electricity and the chance of getting tax breaks or other perks. 

It takes time to save enough money to get the money back that was put into the business. 

Environmental Impact:

We use less fossil fuels when we run our air units with solar electricity. This cuts down on greenhouse gas emissions. We can make this change to make our community better for the earth and make green energy sources expected in the future. 


You must know the amount of sunlight the area receives, the electricity the air conditioner consumes, and the efficiency of the solar power system to ascertain the number of solar panels to install on a certain unit. Giving clients this knowledge helps them choose the best way to use solar power for cooling, which is very important for RAR Energy. People who buy air conditioners driven by the sun might save a lot of money on their energy bills and help make the future more sustainable and eco-friendly. RAR Energy wants to make this change more accessible by giving you good solar choices and help from experts.

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