GroundLoop wrote:Be carefully connecting that generator (EU2000i) Neutral to Ground to appease the EVSE.
My understanding is that the generator's inverter puts out two out-of-phase waves on the Neutral and Hot.
That is 60V AC RMS on each, out of phase to make 120v power.
The typical residential outlet is "split phase" with Neutral grounded at the panel, and 120v on the Hot. (or 240v between two phases, of course).
If you connect Neutral to Ground on the generator, the entire generator frame will carry 60V AC relative to earth ground. I don't know if the EU2000i insulates this well, or if 'ground' is exposed. Likewise for the car, which would now also be hot versus earth ground.
Can anyone confirm?
This seems like a significant hazard if it's true.
There is no current path. Your assertion that there is 60V AC "relative" to earth ground would require an earth ground somewhere. You would have to drive a ground rod and connect it to the generator DC side to effect this. The generator works by generating 3-phase AC in an alternator and rectifying it with a 6 diode bridge, then the resulting DC is filto use in a high frequency H-bridge used to generate 60hz sine wave via PWM. The "center" or average of the generator windings is indeed at +/- 60v, but since it's not connected to anything and it's isolated, there is no potential. In the event of an alternator winding insulation failure short to chassis, there would be current flow if you had neutral to chassis bond connected, and the generator would overload. If you didn't have a ground connection bonded, you'd be blissfully unaware of the fault, so one might argue it's actually safer to make the bond.
I can confirm that the AC output on the EU2000i is isolated from it's ground screw and frame ground. Bonding either AC leg to generator ground will present no problems, as the new "reference" is then the generator frame and the car body itself. There will be no current flow to/from earth ground, as there is no connection to it.
Funny that we are discussing a non-existent ground loop and that's your forum handle! =)