Amzdeal&reg; 30A Solar 12v / 24v with LED Indicator Charge Power Controller / Regulator-black Electronic protection:Overheating, over charging, over discharging, overload, and short circuit High quality, efficient and reliable Solar Power Regulators They are perfect for rural electrification system Reverse polarity protection : Any combination of solar module and battery Solar regulator for street light, Dual load function, Battery type selection, Full electronic protectio