First off the answer behind how much solar power you need to run a refrigerator lies in the number of solar panels you need.
How many solar panels and batteries do i need to run a refrigerator.
Really the question should be how much power do i need to power a refrigerator.
For this system you would need seven 75 watt solar panels and four 300 amp hour batteries.
How many batteries do i need for my inverter.
At night there will be no power for the fridge and it will shut off.
You will need a total of 375.
You will need about 1 800 watts of 12 volt solar panels or about 1 400 watts of 24 volt panels.
So in the case of a 12 volt deep cycle battery we are going to divide our 9 600 number watts a day for the refrigerator by 12 volts which tells us we need 800 amp hours.
To size a battery bank we take the hours needed continuously x watts total watts dc volts amps needed.
3 hours of run time needed 1500 watts 4500 watts total 12 volts dc 375 amps.
So we used a whole bunch of confusing math and figured everything out.
Solar power vs battery power.
A solar power setup suitable for refrigerator use requires several devices in addition to solar panels.
We set up the solar panels which we procured from windy nation.
A device called a charge controller will smooth the flow of power from the panels to the battery.
A simple answer would be to say that about three to four solar panels could do the job but you wouldn t know which solar panel is best for your case.
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.
Roughly our fridge draws 1 3 amps per hour.
The solar panels have to be connected to a battery and inverter to provide power to your fridge.
But you will also need a large battery bank to supply.
Because you can t power a fridge on solar panels alone.
Batteries are needed to store the power that the refrigerator will use at night or when clouds block the sun.