4.14 Finally, multiply 174 by 1.25 = 217.5 (approximate to 220) watts of solar panels, which accounts for inefficiency of 25%. This is the minimum solar panels needed to power this solar refrigerator.

The following is a guide on how to calculate the requirements needed to power any appliance in the home using these three models as examples. With this guide, it is now easy to determine the number of ...