input voltage (DC): 12V ÷ 14V output voltage (DC): 21V ÷ 30V output voltage frequency: 50Hz continuous power: 300 W output current: 30 A maximum output current: 34 A housing: plastic efficiency at load: 82% undervoltage protection activation threshold: 18 ± 21 V overvoltage protection activation threshold: 30 ± 33 V