For Mains power from the inverter:
Power dial to lesiure (if moored) or both (if the engine is running)
Plug the boat socket supply into the top socket.
Switch the Inverter on.
For Mains power from on shore:
(do not attempt this moving)
Power dial to lesiure
Plug the boat socket supply into the bottom socket
Plug the power cable into the external mains hookup socket.
For Mains power from on shore/Generator:
(do not attempt this moving)
Power dial to lesiure
Plug the boat socket supply into the bottom socket