What size inverter to run a freezer?

By Matthew Joseph Nandirio •  Updated: 10/11/22 •  5 min read

The 1000 Watts inverter would be adequate to run the freezer. The freezers come in different sizes. Ensure that the freezer you use does not consume more than 70% of the total energy the inverter can produce. If other electronics are connected, then they should not cross the 70% trash hold.

What happens when the inverter is over-utilized when the freezer is connected?

The inverter needs a sufficient amount of energy to run all the equipment connected to the device since the device runs on electric motors. The consumption of electric motor equipment is very high. 

The motor uses the magnetic field to move the centre parts at high speed. To achieve the speed, there are multilayer copper wires arranged so that it produces the circular rotation for the central part to move. 

These wires require a continuous flow of electricity to keep the motor running. Also, due to several wires being used in the motor, there will be high energy loss in terms of heat. 

As soon as the freezer reaches its maximum capacity, the consumption of electricity would also go high.

If you connect more than one device to the single inverter, there are possibilities that the inverter would be overloaded.

As a result, the inverter will slow down due to non-availability of the sufficient energy. 

Will a 2000w inverter run a freezer?

Yes. It is possible to run the refrigerator with the 2000 watt inverter. The mid-size fridge would require around 1200 watts of starting power which can be handled with the 2000 watt of the inverter. It would be best if you did not top the inverter with other devices. Every inverter has a maximum capacity. 

As soon as you cross the threshold, the energy distribution would go down, and your device would not receive the required energy from the inverter.

As a result, the connected device will slow down, and it will not work as expected. 

Also, the power consumption capacity of the fridge determines how long it will work. Check the energy star given by the manufacturer for understanding the capacity.

A high rating implies, that the device consumes less energy compared to a low rated electric device. 

When you are running electronics on the an inverter, you should only choose the high rating devices for power consumption.

If you consider all the above-given suggestions, you will not encounter any issues with the inverters. The refrigerator would work fine even in high demand.

Will a 300W inverter run a fridge?

There are two things you have to consider when you are running a fridge on the inverter. The motor in the fridge would require three times its standard capacity to startup. 

For example, the small size fridge running on 100 watts would require around 300 to 400 watts to start at the beginning. 

However, the extra power would last for a few seconds, but the inverter should have the capacity to generate sufficient power for the fridge.

A household fridge could be handled by a 600 watts power supply from the inverter.

Also, the inverter should have the support of the extra power supply to accommodate the surge power of up to 1800 watts for a split second. 

How many watts does a freezer consume?

A household freezer consumes around 100 watts. The inverter produces the 1000 watts or 1000VA or 1KVA output energy can run a refrigerator comfortably with no trouble.

However, several other aspects may affect the performance of the inverter. You should note these reasons to avoid any challenges while using it.

  1. A 1000 Watts are designed to power the equipment up to 70% of its capacity. Over 70% of use of the inverter will cause a slow down. As a result, some of the connected equipment may stop or decrease its capacity.
  1. If the refrigerator doesn’t have an inverter compressor, then the equipment needs additional power to compensate for the power surge during the startup. Up to 1 to 2 seconds of extra power sources would be required.
  1. The extra power consumption will be 2 to 3 times what the refrigerator generally uses. In the case of a fridge, 200 to 300 watts would require for the first few seconds.
  1. If the inverter is powering more devices, then it will fail to sufficiently power the refrigerator. Also, the other devices will slow down.

Final Verdict:

Always check the surge power and the power required for the equipment to function. Take the decision based on the collective numbers.

You can easily find different sizes and capacities of the inverters in the market. Different types of inverters would have different performing power. 

The average-size inverter would be the best for household equipment. Check the specification to ensure that the inverter can run the freezer.

It should power the 300 watts of equipment during the peak time or when starting the equipment. The access power should be supplied when requires without any trouble. 

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Matthew Joseph Nandirio

Matthew Joseph Nandirio is the Founder of walkingsolar. After graduating from the University of Houston in 2002, matt started working as an electrical and electronic engineer for several multi-national solar energy companies. He has a wide range of experiences including solar system requirement analysis, planning, maintaining, debugging and even solar device development through research. He now shares his 20 years of expertise through his articles on the walkingsolar website. Further, he is also the author of two books on Solar Technology, “Solar Power for Villages” and “DIY Solar System for Dummies”.