5 Watt Solar Panel

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 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 ...

I have a trolling motor on my boat, would a small 5 watt solar panel recharge the battery over a few days, and is there a danger of over charging,

ok for a 12v standard(not deepcycle) yea sure i use them all the time to make sure that my toys fire up

with a deep cycle or larger batt you may have to step up. Contact a rv place they sell larger ones for different batteries
...

2008-07-06 04:38:06 by hillnumber12

better question...
Which one of these are better?

http://shop.ebay.com/items/12%20volt%20s olar%20panel?_dmd=2&_sop=1

Keep in mind, I am on a tight budget. that is why I am thinking that I might be able

Nata's math is a little off - the units don't work out. If a 12 V battery does indeed have 50 wh of energy in it as he suggests (that sounds right to me), it will take 50wh/1.5w = 33 h. Nata converted to amps and then ignored the voltage rating of...

2009-04-05 13:28:50 by Israel Lover †-pray4revival-†

Will one of those 1.5 watt solar panels be enough to keep a car battery charged if you leave the vehicle for long periods?

On it's own, no. You'll also need at least a rudimentary charge controller, to avoid over-charging. The simple "voltage regulator" from a car will do, if you are talking about a 12V battery

2007-01-30 16:20:01 by zarnticolz

I am trying to find a way to power my sirius sattelite boom box using solar. I was thinking of using the 12v 5 watt panel offered on harborfreight.com (ITEM 41144-0VGA) with my boombox (SUBX2.) The only problem that I see is the input voltage on...

You would be best served by using the solar panel to charge up some NiCad batteries instead of directly connecting the panel to a boom box. (unless you need this for a demo on solar power)

The solar panel is not going to output a stead

2009-08-20 23:22:21 by Walter

I'm interested in purchasing a 5 watt solar panel to hook up to a car battery.

You can get one that has a diode. This will stop the discharge.

Why do you want to charge the battery with a solar panel? You may only over charge the battery and cause it to wear out earlier. It is better to to let the car's...

2008-03-23 06:49:54 by gabeezalbub