Do a search on "trombetta". There are a couple of threads on this topic. Also so you need to note the coaches seem to be hand wired and they are not all the same.
On ours I pull the fuse at the Trombetta, then shut the coach off. After a few minutes you can put the fuse back in but the Trombetta won't re-engerize at that point; at least for ours. And yes the Trombetta get extremely hot.
2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy