Will a 1000-Watt Inverter Run a Refrigerator? | If Yes, for How Long?

Several factors are involved in powering a refrigerator, and you may ask: Will a 1000-watt inverter run a refrigerator? If you’re thinking about using a 1000-watt inverter, there are a few things you should consider. A powerful battery and an inverter to run the refrigerator. So that you can get an inverter that fulfills your demands, let’s go through the fundamentals in this guide.

Key Takeaways 

  • A 1000-watt inverter with a 2000-watt surge capacity should run most modern fridges with a size of around 16 cubic feet
  • Inverter’s primary work is to provide continuous power to your equipment
  • It takes six 600ah batteries with 300ah usable amps to run a refrigerator for 24 hours
  • A 2/0 AWG size cable is suitable to use between a 1000-watt inverter and a 12 DC battery

The size of the fridge is another factor to consider. Ensure the power inverter can handle the extra power required by a larger fridge. Different inverters have different features.

Couple smiling in front of a fridge

Will a 1000-Watt Inverter Run a Refrigerator?

Yes, if it’s a modern, energy-efficient model.

A 1000-watt inverter with a 2000-watt surge capacity should run most modern fridges with a size of around 16 cubic feet.

To be sure that you buy a correctly sized inverter, mainly if your fridge is huge, you’ll need to know the power consumption of your refrigerator (especially if it’s an older model) and the rated surge capacity of the inverter.

The inverter brand is another factor to consider. With inverters, plenty of cheap junk is out there that doesn’t live up to the advertised power rating or surge rating.

What Size Cable To Use Between Inverter And Battery?

One of the most important aspects of getting your off-grid system running is figuring out what cable to use for the inverter. 

In fact, for safety reasons, you must use cables of the correct size when connecting your inverter to your battery. If you don’t, your inverter can overheat and not handle full loads, posing a fire risk.

A close up of an orange converter

So, here are the steps you should take:

  1. Finding safe cables begins with noting the size of the inverter you’re using.

It all boils down to the power output, whether you’re trying to figure out what size wires you’ll need for a 1000-watt inverter or a 500-watt inverter. You can expect the inverter’s dimensions to be on the product description.

  1. The DC voltage of your battery

You’ll be measuring the DC voltage, the sum of all DC voltage generated by your battery. There are 48, 24, and 12-volt DC systems; their differences can be confusing.

  1. Next, divide your battery voltage by the inverter’s wattage.

You will get the upper current limit your wires can handle. When selecting your inverter’s wire or cable size, you can use the result as a rough guide.

For example, (1000 W)/ (12 DC) = 83.33 A

Note: Voltage * Amp = Wattage

  1. According to our example, the maximum current the cable can carry to supply the inverter is 83.33 amps.

A 2/0 AWG cable is suitable for our application. It would be an excellent decision to go with it, especially for lengths over 10 feet.

A 1000 watt converter

How Long Can An Inverter Run A Refrigerator?

It depends on the fridge’s power consumption and the power draw available to the inverter. The larger the fridge, the more power it needs.

You can run the fridge from the main AC power supply if you are on a grid-tied system.

Inverter’s primary work is to provide continuous wattage to your power tools and equipment. If you supply DC power to the inverter from your solar panels or battery bank, your inverter will supply AC power to your fridge.

It takes six 600ah battery power capacities (with 300ah usable amps) to run a refrigerator for 24 hours.

If you are going to load other appliances on the inverter, it is going to take much more power and more batteries.

Here is why:

300 amp hours is about 1200 watts, which is the power consumption of the average kitchen fridge for only a day. To run the refrigerator daily on batteries, you must keep it recharged, either with solar panels, a generator, or electrical power.

Since residential refrigerators use a lot of power, it will take a lot of power. So, it’s possible, but you need much more than a 1000-watt inverter.

Even if you can get the fridge to run on a 1000-watt inverter and 600 ah batteries, you cannot run other appliances.

A timer inside a fridge

What Size Inverter Can Run a Fridge?

To ensure you get the right power inverter, you need to know its power consumption. Different styles, brands, and refrigerator models will use varying amounts of power.

A full-sized refrigerator could have a freezer or be a side-by-side model.

Each type will have different energy needs without considering the appliance’s age or the efficiencies offered by better-quality brands.

Find out the watts that your unit will consume, then multiply by 3 to cover the compressor power surge. It’s the only way to know for sure.

Tips for Running a Refrigerator on an Inverter

Use the smallest fridge that will meet your needs. The inverter is only one part of running an appliance off-grid. Even though your inverter will handle the power capacity values, a large fridge with high power consumption will take a lot of expensive solar power inverters and batteries to run.

Now you may ask, which inverter is preferable?

Inverter on a ground

Pure Sine Wave Inverter

Using a Pure Sine Wave inverter with sensitive electronic equipment is best because it creates a clean and stable AC power source. 

It contrasts most inverters, which generate modified sine wave inverters. The benefits of using a modified sine wave inverter include the following:

  • Clean and stable power: They generate a clean and stable AC power source that is ideal for sensitive electronic equipment
  • Efficient: They are more efficient than other types of inverters, meaning they waste less energy and run cooler
  • Quieter operation: They generate a quieter AC power source than other types of inverters
  • More ups and downs: It can better handle voltage fluctuations than other types of inverters
  • Longer life span: Pure sine wave inverters have a longer lifespan than other types of inverters

Pure sine wave inverters produce high-frequency technology ideally suited for appliances like refrigerators, which are very sensitive.

Too high a power frequency can damage the internal electrical surfaces. A pure sine wave inverter will prevent this from happening, keeping your fridge motor running smoothly.

A black inverter

What Should You Look for When Choosing an Inverter?

You should know the following three ratings for off-grid inverters:

  • The running wattage rating for continuous power 
  • The running wattage rating for surge power 
  • The running wattage rating for input voltage 

Let’s look at what these ratings signify:

Surge Power

The rating shows how much overloading power an inverter can withstand in its maximum capacity for a brief period, usually under a second.

When the inverter is for a refrigerator, this rating is significant. During startup, these appliances need ten times the wattage they need while running.

Often, an inverter’s surge power rating is twice as high as its continuous power rating. It’s not always the case, though.

Some inverters can’t power refrigerators because of their low surge power capacity. So, before making a choice, check the specs for this value.

Surge Power sign

Continuous Power

It refers to how much electrical power (Watts) the inverter can output constantly. A wattage rating for an inverter often refers to continuous power.

This inverter can power anything that uses 1000 watts or fewer if a solar or battery power source is available.

Input Voltage Rating

Inverters transform low voltage (12 volts) into higher voltage by converting DC power to AC power (110-120 volts).

The DC input of the inverter can accept voltages that the manufacturer specifies.

The recommended input voltage range for 12V inverters is between 9.5V and 16V. The input voltage for 24V inverters might be in the 19 to the 32-volt range.

Therefore, when purchasing an inverter, ensure the input voltage matches the battery’s voltage.

Will a 1000-Watt Inverter Run a Mini Fridge?

Yes, a 1000-watt inverter can run a mini fridge. The power inverter should have enough battery capacity to handle up to 1000 watts of steady output.

A mini fridge


What Appliances Can I Use With a 1000W Inverter?

Appliances you can use for a 1000 inverter include computers, TV, kitchen appliances, smartphones, or camera chargers. A 1000W inverter is frequently the best size for most simple installations.

How Long Will a 1000-Watt Inverter Run a 12-Volt Battery?

A 12-volt DC battery capacity with a 50% discharge can power for 34 minutes with a 1000-watt inverter at full power usage. This calculation considers the typical 95% efficiency of sine wave inverters.

Can You Link a Solar Panel Directly to an Inverter?

Yes, you can directly link solar panels to the pure sine wave or modified sine wave inverters instead of the charge controller. Your photovoltaic array’s most crucial component is a proper, high-quality solar power inverter. It is a crucial link between the grid and different power capacities, such as the battery that connects solar panels.

What’s the Difference Between Running Watts and Surge Watts?

The difference between running and surge watts is that running wattage is the continuous wattage required to run your appliances. Surge wattage refers to the extra surge power necessary for two to three seconds to operate the electric motors of common household appliances, such as refrigerators.

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