Re: Solar car battery charger

On Sun, 3 Nov 2024 21:58:11 -0700, Charlie wrote:

What kind of panel do you think I need?
And does it need some kind of control module to charge a car battery?

You can  cheap out and skip the control module if you keep an eye on the
voltage. A little overcharging probably won't hurt not the greatest
batteries. Just check the electrolyte levels and keep them up. Put a
blocking diode in series with the panel.

https://www.homemade-circuits.com/how-to-make-solar-battery-charger/

Some cheap circuits if you know anything about electronics. Solar panels
have a nice feature. They are current sources. Short them out and the
voltage goes to zero and the current limits to the short circuit current.
Obviously you want a blocking diode since shorting a lead acid battery
usually is a little dramatic.