My new/old boat came with an older Prosine inverter charger
and it was wired so that all shorepower went to in on the input side and the AC output then went to the AC panel. If the inverter fails I/you can bypass it by taking off the AC input cable and the AC output cable and connecting them together using an "European" style AC connector. This should be securely mounted if you leave it that way for any time. I would disconnect the shorepower first and also the DC from the battery
before this to avoid a potential fatal accident
I did not want to do that if (when) it failed so I came up with a rotary switch that allows me to switch from shorepower or AC out from the inverter to go to the main AC panel. When on the "shorepower" setting it also supplies the inverter/charger with AC in so the charger can work. When on "Inverter" it will disconnect the shorepower AC from the main panel and from the inverter AC in. Note that the AC out will still be "live" but just not connected to anything other than the switch when on "Shorepower". I can also turn it to off so no power goes to the main panel but that isn't really required.
The switch I used was a Blue Sea 6337 rotary switch which is usually used for switching from shorepower to generator
to go to one or Nottwo panels
. I had to be creative to figure out the wiring. The drawback is that the switch is not inexpensive and it does require some installation
work and maybe some pieces of new 10-3 AC wire depending on location and where the existing wires are.
I've tried everything I can think of to convert my diagram from MS Excel to a PDF that would be small enough to send via the Forum. Can't do it. If you want I can send it to you via an email
if you contact me via a CF message and give me your email
address. Or anyone else who might want it. I have attached the "normal" wiring diagram.
It is very straightforward if you understand AC basics and are handy at electrical
wiring but don't try this unless you are sure you have the skills and knowledge. AC can be fatal or start a fire if not done carefully.