Vaughn wrote:

The ground isn't bonded to the neutral, with 60 volts from each pin to
neutral, so a grounded plug into a wall socket would damage the inverter,
so it needs to float or use an external isolation transformer.

Nonsense. I plug mine into my transfer panal all the time.

Hmmm... IIRC, the EU2000 user's manual mentions this...

I stand corrected. The note on page 14 of the on-line user's manual says
the receptacle grounds are connected to the frame, and the wiring diagram
on page 54 shows that, but I couldn't find any warning not to connect the
rectangular pins to the ground, and Vaughn does this, so it seems OK :-)

Nick