I get the legal side of things. I’m just curious about the technical details.
I’ve seen with three YouTubers and two trained Victron installers who have done this. For years, I’ve been saying that when 120/208 is passed through an autoformer and a new center-tap, the new 0v reference should be exactly halfway between the L-L voltage, which is 104v. If you use one in a modern campground without manually switching or isolating it to a single leg, you’re likely to cause a brownout.
Here is a example on this very forum:
Also, I don’t see how you could be using 120/208 shore power and have the inverters switch from 120 degrees to 180 degrees of phase separation. I’m not sure if the floating phase return option would allow that. I thought that was only for smaller deviations.
This is pure theory because I keep getting told that this is possible and being done and I feel like I am incorrect about my knowledge to have so many people claiming it works.