Simply enter your battery specifications, solar charge controller type and desired charge time into our solar panel size calculator to find out how much solar you need to charge a 12V battery. Once you’ve input all of the variables, you will get an estimate on how much solar power you'll need to charge your 12V battery at your desired speed.
What Size Solar Panel Will Charge a 12V Battery Calculator
It’s important to note that solar panels come in sizes ranging from 100 watts to 500 watts and so you may need multiple solar panels depending on what the total size of solar panel is needed.
For example, if you need 250 watts of solar panel, it might make most sense to get 2 x 150 watt solar panels so you have a little bit extra.
Lastly - solar panels will never produce as much power as they are rated for so going with a little bit extra size on your solar panel is always recommended.
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