Solar charge current
I've read about solar charging systems, and am impressed when the owner boasts of the current generated. What I don't understand is how a system that generates 20-50+ amps doesn't fry the batteries. ...
Forum Discussion
DarkSkySeeker wrote:
If I had a big array and one battery, the charge controller would limit the 50+ amps to perhaps 4 amps to the one battery?
Max current accepted by battery depends on how deeply it is discharged. Could be a lot more than 4 amps for one 100AH battery - at the beginning. Then current drops as it's nearing the Full. Then it jumps up again when you turn some powerful device On - solar outputs the energy directly into the device.
Controller controls volts, differently on different stages of charging. When it controls volts, amps (= charge flowing into battery) are also affected.
As long as it doesn't interfere too much with RV aerodynamics, there is no penalty for having a bigger solar than you think you need, but there are often benefits.
