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AR15.COM
6/27/2014 8:08:51 AM EDT
I just bought one of those briefcase solar panel chargers (13 watt) from Harbor Freight. I want to hook it up to my trolling motor on my boat. Can I just hook it up directly to the battery with the clamps provided, or do I have to have a solar panel charge controller? New to solar panels & not sure what the charge controller thing is for. I'm thinking it's just to prevent overcharging right? So, if I was there physically monitoring it, I wouldn't need one, correct?

Here is what i bought:

http://www.harborfreight.com/13-watt-briefcase-solar-charger-68750.html
6/27/2014 8:18:12 AM EDT
[#1]
13 watts into a trolling motor battery is in NO danger of overcharge.
 check the  electrolyte level, and add water after a few hundred hours of  charging in DIRECT sunlight.
.
A charge controller is  a waste of electrons   in such an application,  tiny solar panel on big battery.
6/27/2014 8:21:02 AM EDT
[#2]
It outputs 12 volts so you can just connect that panel straight to the battery using the provided clamps.  The bigger panels put out a higher voltage that you would step down to 12 volts.
6/27/2014 8:22:46 AM EDT
[#3]
How much draw does the trolling motor have?
13W isn't much output.
6/27/2014 8:25:40 AM EDT
[#4]
get a cheap controller off amazon, I use one (little larger panel) to keep my trolling battery topped off on my jon boat.  Plenty of sun in FL to keep it charged
6/27/2014 8:30:50 AM EDT
[#5]
Thx for the feedback. Not lookiing to recharge fully dead battery, just keeping it topped off.
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