solar controller CE certification maximum efficiency with ... auto work for battery long-life. Use temperature compensation. High accuracy over discharging control by the discharging ... : LED indicating the system of charging, overcharge, power full, power low, over-discharge, over load, out short ... 6V; 2/24Vcharge return voltage13.2v;2/24VTemperature compensation-5mv/°C/cell (Boost charge, Direct charge, ...