... Regulation: ±0.5%Efficiency:≥80%Protection:Over current,over voltage,short circuit,over heat, cooled by DC fanThis PSU power supply units ... ,charge of storage battery,etc. equipment.Adopting to advanced switching power supply control technology and components, elaborate design ,small volume, ... can be continous adjusting from 10% ~ 100% AC220V 50Hz DC 0-48V 0-40A Power Supply Units (SKK-S-2000W-48)