View Full Version : Automatic SOLAR Battery Charger

02-11-2009, 10:37 PM
Has anyone come across an automatic solar battery charger?

My storage unit does not have power, and I was thinking if I could put a solar charger outside the unit, it would work awesome.

Has anyone seen an automatic charger?

Do I need to even worry about a solar charger overcharging my battery?

02-11-2009, 10:43 PM
I have seen them a lot on sailboats. You can find them. I think West Marine carries them and I think I remember seeing them in the Overtons catalog as well. Make sure to get one with the charging regulator so that you do not overcharge your battery by just sending a constant charge into the battery at all times.

02-11-2009, 10:50 PM
im kinda curious about how effective these are, we keep our boat on a lift hooked up to a maintainer, but some of those panels are pretty inexpensive. and its not like the top of the dock is ever in shadow or anything.

02-11-2009, 10:58 PM
Check out Northern Tool. They have several. If you have good southern exposure, a 5 watt solar panel should maintain a single 12V battery with no problems. Most have a built incircuit to prevent over charging.

Workin' 4 Toys
02-11-2009, 11:21 PM
There is one on the lift we use to charge the battery for the 12v motor to raise and lower. The solar panel itself is about 10 years old now, and have yet to have a problem with it, let alone that it faces west (south it ideal). I do not (think) or know for sure if it has any over/under charge protection circuits. It is probably a 12" x 18" panel.

If I were to buy one for the same or similar purpose, I would probably end up with this.

02-12-2009, 01:57 AM
Same for me as Workin'. Probably a 12" x 6" solar panel that keeps the battery charged for the 12v motor used to raise the lift for my 190. I presume the output is right at 12v so no need for any circuits to protect over-charging. Appears to be a very inexpensive and simple solution...and has required absolutely no maintenance since I inherited it.

TX.X-30 fan
02-12-2009, 08:12 AM
When the neighbor boys trashed my original gate opener solar panel, I got one for a deer feeder small and cheap worked great.

02-12-2009, 09:32 AM
Sodar...there are various amperage ratings how big were you looking to go?

02-12-2009, 09:33 AM
You may want to go with one of these with the charger.....

02-12-2009, 09:35 AM

02-12-2009, 09:49 AM
Sodar...there are various amperage ratings how big were you looking to go?

Enough to keep 2 Optima D34M's maintained while the boat sits in storage... :o

02-12-2009, 09:51 AM
well maintaining it isnt hard 1 amp is fine. You just need to get somthing to monitor it so it does not overcharge it. I will look around and see what i can find

02-12-2009, 09:55 AM
this would work i think

02-12-2009, 11:51 AM
A friend of mine has one on his dump trailer battery. It works great. I'm pretty sure it's a battery tender that he has, but I'll double check. It does not overcharge.