Rated Voltage DC 32-56V, Biggest Open Voltage: 48VDC, Max Power: 500W, Voltage Under Voltage: 22.0±0,2VDC, Best working Voltage: 48VDC+2V, Current Overload: 15A, Over Current: 20A, Dimension: 250x200x70mm, Weight: 10Kg, Ambient Temperature: -20 degres + 5 degres, Adaptative Solar Panel Peak Voltage: 48VDC, Open circuit voltage: 56VDC, Connection Way: All Solar Panels in Parallel