Thanks Fred. I will start in that breaker box aft of the inverter. But, shouldn't the line in from that breaker box into the bay GFI have voltage between the black and white wires in the 12/2 wire coming from the breaker box and be connected to the line side of the bay GFI? Also, the diagram I have shows that the Lavy GFI is fed by the bay GFI. According to the training I received at Tijuana Tech (that cost me 4 pesos payable to the bar maid) the second GFI should be fed from the line side of the Bay GFI, not the load side. Does that sound right to you?