... battery MPPT15 12/24V 10/15A solar energy regulatorMPPT15 15A solar controller (also known as intelligent solar charge controller, solar charge controller, PV ... can increase the efficiency of PV modules by 10%-30%. MPPT solar controllers 10A--60A include 12V series, 24V ... due to many different factors, such as the difference in solar panel making, the change the Sun illuminance, change in temperature ...