18V/5W solar panel to trickle charge a 12V car battery?
I''m running a small Arduino project out of an old 12V car battery (that was on my car since 2008 till 2015). I also have a 18V/5W solar panel. Can I connect them together so the solar panel charg... $begingroup$ Actually it will probably work fine with a car battery. Actually it will probably work fine with a car battery.