PaulRainbow
Well-Known Member
A bit late to this perhaps, but I think that the 3 way switch in your AC circuit diagram should be double pole, that is switch both line and neutral.
I hadn't looked at those schematics, been a bit busy here.
You are absolutely correct, the negative must be switched too.
Also, the battery charger should not be used with the inverter on. A three pole switch could be used to prevent that.
I'd also question having the calorifier on with the inverter. The OP has a lot of solar power, so might get away with it, careful monitoring would be advisable.