Tom, those switches are no longer functional but to be on the safe side, after I had my 1200 W Heart replaced with a 2000 W ProSine, I removed the lead from one side of each of the old inverter switches and taped it off with electrical tape.
The Newell installed system used separate relays in each circuit that was powered by the inverter. The clicking you hear is the old relay energizing. The installer should have removed the wires from the old relays and installed a new breaker box to run the new circuits. I don't like having current going to unused relays thus my reason for taping off one of the wires to each of the previous inverter switches.
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