The size of the fridge will have a big impact on how many solar panels you'll need to run it. A standard fridge will use about 730 watts, while a larger one can use over 1,000 watts. If you're using a chest freezer, that number can jump to over 2,000 watts. In terms of solar panels, that means you'll need at least two 100-watt panels just for the fridge - and more if you're running other appliances at the same time. And that's assuming you have perfect conditions for solar power generation: plenty of sun and no shading. Of course, your actual needs will vary based on a number of factors. The efficiency of your fridge, the power output of your solar panels, and how much sun you get in a day all play a role in how many solar panels you'll need to keep your fridge running.