SolarEpic Tracer 2215BN MPPT 20A Solar Charge Controller 150V Solar Panel PV Input 12V/24V automatic identify or user-defined working voltage. Lock the MP point fast and the controller provides the industrys highest tracking efficiency of 99% Four battery type options:Sealed, Gel,Flooded,and USER Intelligent lighting and timer control for solar lighting system Die-cast aluminum design and nature cooling Heat Sink Charging LED indicator RTS Port Solar Terminal Battery Terminal Load Terminal RS-485 Port Button (Load Switch) Battery LED indicator Setting the Solar Charger by Remote meter MT50 Android EPEVER APP via EPEVER eBox (wifi or bluetooth) PC monitoring setting software Solar Station Monitor Use USB to RS485 converter cable with model: CC-USB-RS485-150U