5 Watt Solar Battery Charger

If I bought a random crap car battery would this be enough to charge it completly over time. Just putting it in the sun and hooking the red and black to the battery? Will this do that job. thanks

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Do the math. Typical car battery is 70 amp hours (your battery will say). 1 watt = 1 volt x 1 amp. 70 amp hours @ 12 volts = 840 watt-hours.

So your 5-watt solar charger will take 168 hours of full-on sunlight to fully charge...

2009-03-08 19:56:08 by drew

I won this 5 watt solar panel in a contest held by Robert Smith which ended at the end of July. I know I've had it for a while but finding ...

My 5 watt solar panel car battery charger manual states that charge controller is not necessary for panels under 15 watts. I'm trying to understand the physics of why that's the case. Even if my panel is only putting out say 15 volts at 350mA...

A typical lead-acid battery can safely be "trickle charged" at C/100 rate, where C is the capacity (if you are talking car battery, that is about 50Amp-hours typical). C/100 for a 50Ah battery is 500mA, so 350mA won't hurt it. The...

2009-11-17 11:35:08 by Michael S

I have a 5 watt solar charger which converts to about .42 amps does this mean that the charger will store .42 amps of power each hour

Do you mean a 3 amp-hour battery? That's usually how batteries are rated. If your charger can really put 0.42 amps into the battery, then that's 3/0.42 = 7 hours. Make that 10 hours, because of the inefficiencies of charging.

3...

2009-10-15 17:10:45 by xpops

I'm looking for an affordable way to charge a large 12v battery with solar power, but with a float so I don't boil it over and ruin the battery or worse. A year ago my brother and I nearly burned his house down with a tiny 0.5 watt solar charger that

Try, bass pro shops, cabelas, dicks sporting goods.
all the outdoor sports shops.
they run about 30 dollars for a marine one. Mine works very well.
Good luck man.

2009-04-22 17:16:29 by Jon M

This is a simple 5 watt solar panel that I am hooking up to a cigarette plug to charge my batteries on my truck that I don't drive much. The panel puts out 24 volts. How do I convert it to 12 volts?

Converters are shown in the link below.

However, most solar panels are 12 volts. I am thinking your have two panels connected in series to get 24 volts. It that is the case perhaps there is a way to wire them parallel instead of...

2008-05-19 13:24:44 by Joe N

I have a 6'x8' deer stand, well insulated, made of cedar, 12' high. I already have a BP 120 watt solar panel, small charger, and a 400 watt inverter. Last year I used 3 optma blue top deep cycle/starting batteries in series, giving me 3 12 volt...

You don't have a deer stand!!!!!!! you have a condo!!! Get real and go out and hunt like everyone else.

2006-09-10 15:57:52 by r7w7h7