... 1,12 Volt or 12/24 Volt auto work 2,20 Amps (for PV and load) 3,voltage: 14.8Volt This ... :20I series: 12 VOLT or 12/24 VOLT auto work, 20 AMPS (for PV and load)Equalization voltage: 14.8 VoltBoost ... new design pwm solar charge controller pwm solar charge controller 20 amp 12V Solar controller indoor use