... 12v 24v 20a PWM Lumiax smart solar controller 1.12V/24V automatic recognition 2.LCD Display 3.IP67 4.CE 12v 24v 20a PWM Lumiax smart solar controller ... As for this product, the details as below: 1Nominal voltage12V fixed,24V fixed,12V/24V automatic recognition2Max solar ... question, please feel free to ask me. 12v 24v 20a PWM Lumiax smart solar controller