How Many Solar Panels For A Fridge

Let s look at a few other examples.

How many solar panels for a fridge.

To work out the size of the panel we need we simply take the 28 45 x 18v average voltage of a solar panel 512w. Now as i said before this is a high power example more typical of a large offgrid caravan or motorhome but the approach is the same. Batteries are needed to store the power that the refrigerator will use at night or when clouds block the sun. Roughly our fridge draws 1 3 amps per hour.

1200 watts divided by 1 000 equals 1 2 kwh produced per day. I use eight 225watt monocrystalline panels to power my home and by extension the refrigerator. I harvest up to 8kwh per day with these panels. How did i come up with 300.

So you are going to need a total wattage of 300 combined solar panels. 300 times 4 is 1200 watts. The need to run solar systems to power a residential refrigerator in rvs started a whole line of larger arrays solar kits. If we assume that each solar panel will average about 75 percent of four hours of direct sunlight each day it would take about three solar panels to power a fridge.

Which when you consider the solar setup draws about 5 amps per hour total we have a decent amount of amps per hour leftover to do with what we please. We set up the solar panels which we procured from windy nation. For this system you would need seven 75 watt solar panels and four 300 amp hour batteries. You multiply the combined wattage of the solar panels by the number of hours sunlight they will receive per day.

If you were using 200 watt panels you would need only three panels and four 300 amp batteries. A device called a charge controller will smooth the flow of power from the panels to the battery. So at 6 65 amps for 8 hours a 120w solar panel can potentially deliver 53 2ah of chargeback into our battery 6 65amps x 8hours 53 2ah. This is far more than the 22ah we need to charge a depleted battery.

Divide that by 30 kwh per month per solar panel and you get 3 8 solar panels. So we used a whole bunch of confusing math and figured everything out. Now as the manufacturers are using more efficient refrigerators the size of that array required may go down as low as 570. A solar power setup suitable for refrigerator use requires several devices in addition to solar panels.

A good rule of thumb is 4 hours. Using the 2400 daily watt hour figure from the above example you would divide the 2400 by 375 and need 6 4 panels. When the rvs first started to integrate residential fridges these systems were around a kilowatt. They are wired 4 in series and 2 strings in parallel.

Always round this off to the higher number.