The UL standard for this type of inverters- UL458 does not have a requirement for a bonded neutral on the output of inverters. What we are running into is that we have 3ph 3W circuits running out to the AC Combiner panels and that wouldn't be a. . I have solar hybrid inverter at home that's connected to the mains using both, the line and neutral wires. This works. . Does a split phase 240v inverter AC input needs neutral? IF one configured a split phase 240v with say 6000 xp, I know the AC output requires neutral wire out to the transfer switch to supply 120v loads, but does the AC input need to have neutral wire? Trying to find out the setup because I have a. . To an engineer, a neutral conductor is a current-carrying wire that balances the unbalanced current in three-phase systems and is connected to the ground. It's possible there is no "neutral", in the sense of where 0 volts, relative to the two. . ense differential current between Hot and Neutral. Wiring the First Micro Inverter.