Dometic/Waeco Refrigerator Solar Panels (Calculations)

Outdoor living, off-road living, off-grid living, and other adventure applications require some chilling appliances. Stay tuned if you wonder if a solar panel can run a Domestic/Waeco refrigerator.

A Note: Dometic is the company behind Waeco. When shopping for a Waeco fridge, you will come across the Dometic brand. They are pretty much the same thing. 

In this blog, we discuss

  • The size of solar panels needed to run a Waeco Fridge
  • The relationship between the solar panel and fridge
  • Solar components that make powering a Waeco fridge safe
  • The solar circuit and how to figure out wattage needs. 

Inside we tell you why a solar connection can handle a Waeco fridge and some other essential tips. 

Waeco Fridge

What Size Solar Panel Do I Need to Run A Waeco Fridge?

Most 12-volt refrigerators need a solar panel of at least 150 watts, and you will likely need two of them. In addition, you will need a solar battery to store enough energy to power the fidget throughout the night.

A 200-watt solar battery system should be the right size, but you can also add more storage. 

Issues that may cause you to use more solar Battery stored energy include:

  • Storms and Cloud Cover
  • Shading 
  • Hotter temperatures
  • More use of the fridge

Storms and cloud cover mean less direct sunlight striking the solar panel.

However, if you plan to travel to locations where the weather is dynamic, then you may want to consider upping the number of solar panels for your fridge.

Clouds & Shading

More solar panels on a cloudy day mean that your solar array will produce more energy than a single panel on the same day. 

Shading occurs when something blocks the sunlight from striking the panel. For example, a shadow or clouds cause solar shading.

Shading can generally be avoidable if you think ahead. Avoid parking under trees or buildings where the shadow will move as the sun does.

It is not much you can do about cloud cover, except as described under storms and cloud covers. 

See also: Solar Powered Products: Top 10 You Should Invest in Today


If the temperature gets hot, you will likely use the fridge more often. That means opening and closing the door more frequently.

Another aspect of hot days is the temperature of the solar panels. As they get hot, they produce less energy. If they get overly hot, the energy production drops quickly.

For that reason, never lay a solar panel on a flat surface. Instead, ensure it is elevated off the surface so air can flow underneath it. The improved airflow helps keep the solar panel cooler. 

TIP: Calculate the fridge’s energy and then determine how many watts of energy it requires to run in 24 hours. Some solar calculators can help. 

Portable solar panels and a campervan on a beach next to the sea

Can You Run A Camping Fridge Off A Solar Panel?

Using only a solar panel to run a camping fridge off-grid isn’t effortless. However, it would be best if you had a battery and generally one that can hold 200 or more watts of energy.

Also, compressor-type fridges work better for solar power operations, and you want a fridge designed for battery power or solar power. 

 The way energy flows in solar power to fridge circuit is like this. 

  1. The solar panel produces DC energy and sends it to the Battery for storage.
  2. The Battery sends energy to an inverter or to DC appliances, such as the camping fridge as needed. It is highly advantageous to use an inverter so that the energy flow is even before it reaches the fridge. 

Without the Battery, the fridge would not have energy when the solar panel did not produce energy; At night, during shading, or during storms.

So, the relationship must remain solar panel to Battery and Battery to the fridge. 

Campin with an RV with solar panels
Campin with an RV with solar panels

How Many Solar Panels Do I Need to Run A 12 Volt Refrigerator? 

A solar panel is made up of solar cells. It would be easy to say you need one or two solar panels, but it depends on the panels. 

Generally, you need two 150-watt solar panels to generate enough energy to keep the solar Battery fully charged. 

The Waeco DFX — model #CFX-95DZ2, per their site, uses 1.25 Ah/h.

That means the unit uses 15 watts of energy per hour.

  • The formula is amps x volts = watts. The #CFX-95DZ2 would need 15 watts x 24-hours or 360 watts in 24 hours. For this model, you would need solar panels that produce at least 400 watts of electricity per day. 

The other component here is how many hours of direct sunlight the solar panel would receive.

If the solar panel is 150 watts, it would be 150 x #of direct hours of sunlight. If you received four hours of direct sunlight, the solar panel would produce 150 watts x 4 (hours) = 600 watts. 

How Big of A Solar Panel Do I Need to Run My Fridge?

If you want to know how big of a solar panel you need to run your fridge, you would need to know the following:

  1. How many watts of energy does the fridge use per hour. You can find that information in the owner’s manual or by checking the manufacturers’ website. 
  2. How many hours of direct sunlight the panel would get per day. 

The formula – it’s easy

It is the number of hours of direct sunlight per day x the maximum number of watts the solar panel can produce. Eg. Five hours of direct sunlight x 150 watts = 750 watts of power per day.

Once you figure out how many watts of power the fridge uses per day, you can choose the right-sized solar panel to match the fridge’s energy consumption.

It is advisable to select a solar panel that can produce about 30% more energy than the fridge needs.

This is because energy production will vary based on weather, shading, and other factors. For example, a heavy storm day will cause the panels to produce a lot less energy. 


You will also need some solar Batteries to store the energy from the panels. For example, the fridge will need energy from the battery during the night. 

If you are wondering what type of solar panel you need to run a Waeco Fridge, you could check with the manufacturer to see if they offer a solar kit.

Chances are they do, and that kit would be appropriate for your fridge. You could also make this a DIY project.

You would need solar panels, connectors, a solar regulator, a solar inverter, solar batteries, and a fridge. 

The solar controller will stop the solar panel from overcharging and ruining the batteries.

The solar inverter will convert the DC energy from the solar panel and solar batteries to AC energy if the fridge requires AC energy rather than DC energy. 


Photo of author
Elliot has 20+ years of experience in renewable technology, from conservation to efficient living. His passion is to help others achieve independent off-grid living.

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