Can a Sun Gold, model LFPV10KW, solar inverter be damaged if one or both of these things are done:
- the inverter's terminals are shorted together while attaching the 220amp battery to the inverter. With one of the battery cable connected to the inverter, the pliers used to connect the second battery cable to the inverter touched, during tightening, both positive and negative post. The individual luckily only received minor burn the hand.
- the inverter's output is connected to the sub panel, through a 60A breakers. Three of the circuit breakers in the sub panel was then connected to three circuit breakers (under terminals screws) in main panel. When the utility power was cut off, the inverter took over. But when the utility power was restored the inverter did not transferred back. While under utility power, both inverter and utility are feeding power into the panels.
Back story: My electrician, in order to test the transfer switch inside the inverter, decided to run wires from the circuit breakers in the sub-panel to circuit breakers in the main panel. When the power in the main panel was shut off, the invertor kicked on. However, when the utility power was cut back on, it created a back feed, and the 200amp main breaker sparked, meanwhile the inverter did not shutdown.