3.103indicate a faultannunciate that a fault has occurred, in accordance with 13.93.104inverterelectric energy converter that changes direct electric current to single-phase or polyphase alternating current3.105inverter backfeed currentthe maximum current that can be impressed onto the PV array and its wiring from the inverter,under normal or single fault conditions3.106isolated inverteran inverter with at least simple separation between the mains and PV circuits