Wiring system in Avondale in Avondale Caravans Posted October 18, 2020 1 hour ago, Paul1957 said: I am still a bit confused, are you saying now you have solar with its batteries with an inverter which just supplies 240 volts ac. As well as this you have the original 12 volt system which is supplied by the 12 volt battery and the battery charger/fusebox is supplied through the inverter with 240 volts. If I understand correctly, the change you want to make is to remove the single 12 volt battery and instead run the existing 12 volt system direct from the solar batteries. If these are also 12 volt batteries, what stops you connecting the single battery fittings to the solar batteries, with possibly the need to disconnect the charger ? Yes that’s exactly what I’m trying to do. My concern is as had been stated about the fact this is a 12v system that the lights run from and maybe too thin cable wise to connect in my 240v system which would mean lots of new wires etc. I had wondered about as you suggest connecting this circuit directly to the bank of batteries which are 12v but was worried I may cause a loop and then short it all out. Ive found the wiring diagrams now so think I can do that without causing a issue. Provided I leave this battery separate and connect it straight to the mppt charger not into my bank of batteries. Thank you for the brain storm guys.