ricardocello
Watching and Learning
Honestly, the most straightforward path for the OP is to use the Growatt ATS-US Autotransformers, which integrate in the transfer switch.Ok cool. I was confused because the OP’s inverter is 240 only so would have a lost neutral in that case.
So if the choice is risk of lost neutral vs extra loading of AT if it runs in parallel with grid, I’d rather take the second one
No need to worry about Neutrals, and it looks like the AT will never be in parallel with the grid.
Growatt has thought this through. Unless 24A is not sufficient power for the OP's loads.
Growatt ATS-US