Duo-battery charging solar controller 1. PWM charge mode 2. 12/24 automatic work Duo-battery charging solar controller EPIPDB-COMDuo-battery charging solar controller For RVs, Caravans, and boatsEPIPDB-COM is two battery solar controllers with optional remote meter. Features: Microcontroller digital accuracyEPIPDB-COM series: 12/24 VOLT auto work, 10AMPS (for PV and load)