What to choose, what to choose?

[Jodokk]

Yes.
From one of the diagrams in the latest post, it appears that at least one of the V2H implementations is AC from the EV to the GEN input terminals with a 90A max current (21.6kW max power) and suggests using a transfer switch as well.

So not tapping into the DC from the EV battery directly.

However the one they mention is a GE TC10324 ( https://www.simplybreakers.com/products/general-electric-200-amp-manual-transfer-tc10324r )which is only 2 pole (does not switch the neutrals):

I did not see an implementation where the neutrals (utility and generator) were isolated, however, it could be accomplished with an appropriate transfer switch and wiring changes to isolate the neutrals. Essentially, moving the circuit neutrals to a bus in the appropriate transfer switch.

Unless the neutrals are switched, the Lightning GFCI in the 240V bed outlet will detect a ground fault and trip (two return paths when the neutral is grounded in two places).

The other option would be to unbond the Lightning bed output when being used as a home backup, but that might be difficult. And if not rebonded before using the Lightning to power equipment in the field, present a shock hazard.

Thanks for this detail! I'll pass this on to the installer.

 

[chl]

Thanks for this detail! I'll pass this on to the installer.

Yes, good idea, and I'd suggest you try to use an electrician with some experience with generators and transfer switches - some electricians are better than others at knowing what they are doing in that area.

You want it to work AND pass an inspection (be code compliant) after all.

Good luck.

 

[Jodokk]

Yes, good idea, and I'd suggest you try to use an electrician with some experience with generators and transfer switches - some electricians are better than others at knowing what they are doing in that area.

You want it to work AND pass an inspection (be code compliant) after all.

Good luck.

Will do!

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