SMK MPPT Solar charge controller is an advanced maximum power point tracking(MPPT) battery charger for off-grid photovoltaic system up to 50KW. Models ranging from 20A-100A(12V/24V/36/48V) , over 15 models available, including the economic fan cooling design version and high-performance heatsink cooling version.The solar charge controller is mainly used for solar power stations, home solar power systems,solar street light control systems, mobile solar power systems.