This automatic change-over device is connected to the shore supply, the generator (if fitted) and the inverter. If the power from the shore supply or the generator is disconnected or falls outside the 180 - 250 Volt range, the change-over device will automatically switch in the inverter. Naturally, only loads up to the rated limit of the inverter and battery capacity can be supplied. The automatic change-over device constantly monitors whether power from the shore supply or generator is available again and within the correct voltage range. If so, it will then immediately switch over to that source. When both sources are available, the generator has priority. When switching over to the generator, a time lapse between 0 - 30 seconds can be selected.