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The ground on your typical 240 volt generator is set up as neutral bonded from the factory. For any standalone equipment this is what you want, but when you wire a generaor into your house wiring for a backup you have to break the neutral ground bond.
When I rewired my generator I replaced the N-G link bar on the generator terminal board with a length of 12 gauge wire 15 amp light switch so I can go from backup generator powering my house to remote with out having to take anything apart.
In your house the neutral and ground both share the same bus bar at the main panel.
So I bet the leaf charger uses a very high frequency signal over lay to detect if there is a very, very short distance or no between the neutral and ground like you get with a generator. The resistor will dissipate this HF overlay frequency the same as longer run of wire does.
If I have an EV I want it to have solar panel charging, generator charging and the ability to produce 240v 60Hz power from its battery for powering other stuff.
I already figured out heat and AC for an EV.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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