SolarEpic MPPT 40A Solar Charge Controller 150V PV Input Tracer 4215BN Negative Ground, Max 150V PV input. Advanced maximum power point tracking technology to optimize using the solar system. Support 4 charging options: Sealed, Gel, Flooded and User-defined Over temperature, over charging, PV and load short, PV (battery) revered, over current protection. With supporting PC monitoring software and remote meter MT50(optional) 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