How many Batteries to Run a Refrigerator | An Expert Guide


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Solar batteries are a useful source to run lights, TVs, laptops, and other devices, but the refrigerator is another case. The refrigerators use a lot of energy and power and consume more watts than other electric; appliances. If you want to go around a grid, knowing the answer to the question, how many batteries to run a fridge, you have come to the right place, as there are many factors to play an important role.

How many Batteries to Run a Refrigerator

How many Batteries to Run a Refrigerator

The appliances like refrigerators come with the compressors onboard driven run by electric motors that contain the properties that use the batteries and solar power. 

So the average size of the fridge uses 40 Watts of power in one hour, meaning 960 watt-hours of the battery will need to run a fridge in 24 hours. 

A purely resistive AC load or a DC load, or a continuously running DC running motor runs simultaneously. Fridges and similar devices stop and start in the normal way of operation, and it aren’t easy to know how much power they need for running. 

If you want to run a fridge that needs 1000 watts in one day for 24 hours, you will need a battery to run only the refrigerator. There should be the availability of six hours of sunlight, and the weather should also be good. 

If you know the amount of power involved in your fridge and its use, you must determine how many amp-hours of battery storage are available. 

Watts hours/volts=amp hours

Inverter efficiency is also an important factor. Suppose that the fridge’s efficiency is 85%, and then you replace it with the rating of the invertor. 

  • 1000W/0.85=1176ah
  • 1176ah/12 V=98ah
  • Suppose you use 24V batteries
  • 1000W/0.85=1176ah
  • 1176ah/24V=49ah

So we get the figure of 50ah for 24 V batteries and 100ah for 12V batteries. However, the best option to use these batteries is to discharge them before it drops to under 50%.

It means that you will be able to use the half capacity of the battery. Similarly, you should double the battery’s capacity if you run the fridge for 24 hours. 

Doubling the battery capacity means that 200ah 12 V or a 100ah 24V battery you will need. The battery consumption assumes that the weather is ideal but rare. You have a cloudy climate that restricts solar panel energy production most of the time. 

On the other hand, on sunny days you can store up as much energy as possible and can be able to save them for cloudy and rainy days. That is why there is a need for extra battery storage to run a refrigerator. 


So to wrap up the article of how many batteries to run a fridge, running a fridge with the help of batteries needs a lot of power and batteries, but it is not all the way impossible. With accurate preparation and the mindset, you can have a good setup appropriate for your refrigerator. 

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