Problem Solved - - - -
Many thanks for the feedback. I pounded a new grounding rod (8 ft copper) and connected properly to the source (inverter) and also into the circuit breaker panel per code. Apparently, this upgrade vs. just grounding through the welded metal hangar satisfied the electronics. The GFI plugs tested well both before and after the upgrade. Yep - - the Leaf is sensitive about that ground and also the neutral.
First test (today): 65 minutes of level one charging (120v) gave me an additional 6 miles in the car and was easily handled by the off-grid system. With luck, I should be able to get about 50 miles per visit when I plug into my fully charged system. Hey - - - that $1.20 of "free" electricity will more than pay for my senior coffee (54 cents) at McDonalds!
Driving on sunshine,