Search found 3 matches

by mrwilder
Sat Jul 15, 2006 9:47 am
Forum: General Discussion
Topic: Solar Powered Car Battery Charger Circuit
Replies: 19
Views: 4630

Sounds like in order to keep a car charged, I'd need, say, 15 V @ at least 750mA just to keep up... so, lets just say I'd need between 12 and 15 watts to make a solar panel charger that will keep the battery charged.

Won't need a regulator, just a diode.

Thanks all.
by mrwilder
Fri Jul 14, 2006 7:23 pm
Forum: General Discussion
Topic: Solar Powered Car Battery Charger Circuit
Replies: 19
Views: 4630

Would a more normal circuit include a regulator?

And by that, I'm assuming the circuit would then become a solar cell, an LM7812, a diode, then the battery.

Should I assume that most cars' cigarette lighters are indeed "on" when the car itself is off?

By the way, I'm in Phoenix, AZ, and it's July.
by mrwilder
Fri Jul 14, 2006 8:44 am
Forum: General Discussion
Topic: Solar Powered Car Battery Charger Circuit
Replies: 19
Views: 4630

Solar Powered Car Battery Charger Circuit

Hi all, Okay, there are a LOT of charger discussion threads here and on the web. However, I appear to be suffering from overload. What I need is a basic, easy to build solar powered trickle circuit to keep my car battery charged. The power source is already set: I have two solar panels rated at 15V ...