How do solar charge controllers work? Answered
I want to get a 5 watt 12 volt solar battery charger but I want to clear up my understanding of how they work before I get one.
FIrst: The panel comes with a charge controller. It says it cuts in at 13 volts. What does that mean? It starts charging once the battery drops to 13 volts? That can't be it because 12 volt batteries range in voltage from 11.9 to 12.6 volts (charged/discharged).
Second: "12 volt panels" output more than 12 volts right?: because batteries need 14.8 volts to charge. I think they call it a 12 volt volt panel because it charges 12 volt batteries and not because it outputs 12 volts. It must really output 22 volts and the charge controller steps it down to 14.8 volts.
Thanks for the help