Was thinking about this on the way to work today...
![1643131144588.png 1643131144588.png](https://diysolarforum.com/data/attachments/81/81193-f22ca146b85df2fe5c642bba9dd195c1.jpg)
I think a setup like this gives you reasonably good protection from a floating neutral with a 240v inverter?
No flipping / tripping of a breaker results in a floating neutral. (tripping the transformer breaker cuts all power to the load panels)
You could still have a failed transformer or lose wire, but a regular utility connected house is still susceptible to either of those failure modes.
Assuming this does make sense, anyone know where to get quad common-trip breakers?
Do any manufactures let you "mix and match" single breakers and connect them for common trip?
Otherwise it might be impossible to find a quad breaker with 2 higher current breakers for the inverters and 2 lower current breakers for the transformer.
![1643131144588.png 1643131144588.png](https://diysolarforum.com/data/attachments/81/81193-f22ca146b85df2fe5c642bba9dd195c1.jpg)
I think a setup like this gives you reasonably good protection from a floating neutral with a 240v inverter?
No flipping / tripping of a breaker results in a floating neutral. (tripping the transformer breaker cuts all power to the load panels)
You could still have a failed transformer or lose wire, but a regular utility connected house is still susceptible to either of those failure modes.
Assuming this does make sense, anyone know where to get quad common-trip breakers?
Do any manufactures let you "mix and match" single breakers and connect them for common trip?
Otherwise it might be impossible to find a quad breaker with 2 higher current breakers for the inverters and 2 lower current breakers for the transformer.