I second Dave's comment on trying different GFCIs.  Definitely had some that wouldn't work correctly with generator/ inverter systems. I'd take 2 or 3 other choices.

Otherwise your check list looks like the way to proceed.  We always love to hear back what you find.

Ray Walters
Remote Solar
303 505-8760

Its going to be a Nerd Family Christmas....

On 12/20/20 11:52 AM, Dave Angelini Offgrid Solar wrote:
One way to troubleshoot this is by elimination. The genset would be a start. 
The GFCI itself. I have had to switch from the contractor grade GFCI to a 
quality make in new construction.

  Since this is new I would make sure on the AC panel, critical loads like the 
house pump or fire pumps and refrigerator/ freezer were*not*  put on GFCI. I 
have seen some very bad things happen from this circuit that have nothing to do 
with ground faults. The same for AFCI or my guaranteed income source from 
grid-tie inverters.


Dave Angelini Offgrid Solar
"we go where powerlines don't"

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