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January 31st, 2006 
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Can you use a car battery for in a solar panel system or do you need a Deep Cycle Battery?
Hi all, I am wondering if you need a deep cycle battery when charging (and using) in a solar panel system. I only am using no more than 20 watts at 12 volts. My plan is to take the solar panel, connect the cords to a charge controller which will light a couple of lights, then attach the battery to the charge controller and power the lights during the night.
So would a regular 12 V car battery work for holding this charge or would it not work?
Thanks for the answers
The only difference between a normal car battery and a deep cycle battery, is that deep cycle batteries are tougher. They hold up better when put through a "deep cycle", that is, when you discharge them to around 20% and fully recharge them. A normal car battery will not hold up to this kind of abuse for long, however, if you are not seriously discharging it, then yes your car battery will work.
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