Originally posted by nztomas
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The problem is you have a tiny watch battery on a monster sized solar panel. Your tiny little battery, 12 volt @ 20 AH cannot take a lot of current, 4 or 5 amps at most. Small tiny batteries have high resistance. So even if the battery is discharged, when you try to hit it with 10 amps from the panel causes the voltage to shoot up and fool the controller into thinking the battery is charged and it shuts off or folds back. Otherwise it would just cook your tiny little battery.
Two ways to fix this take your pick.
1. Get rid of the solar panel and get you a 20 watt panel to replace it. Really bad idea though.
2. Get rid of your tiny little battery and get a minimum 12 volt 100 AH battery or up to 130 AH
Panels, charge controller, battery, and load all have to be matched up to work together. You have nothing matched up to work with each other or to do what you want. You just threw something together and hoped it would work. It failed.
A load that demands 10 amps needs a minimum 100 AH or larger battery. You only have 20.
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