I sit with the same problem - not knowing anything, Cape Generators installed three of these inverters for us, (3-phase) and we cannot go off-grit due to irrigation pumps. Now I sit with them - seems like Cape Generators is a Fly-by-Night company. They did give me a COC certificate but the inverters are not on the municipality's list, so what should I do? Take them out and resell them? At a huge loss?