Go Power! 30 Amp Solar Regulator features the Go Power! GP-PWM-30-UL w/Bluetooth. It is a 30 amp pulse width digital solar regulator that is used to protect the batteries from overcharging when using a solar panel. This regulator can handle up to 30 amps of solar charge and charges the batteries using a 4 stage battery charging algorithm. The GP-PWM-30-UL can charge any type of batteries and is selectable for Lithium, wet cell batteries, AGM batteries, and gel batteries.