My question seems to be getting lost in the translation, let me clarify. I have a big 5ver with a 50A service and two ACs. The panel loads are balanced within 10% and the generator runs everything just fine and in that respect I have no problems. I was reviewing the generator manual, specifically, the 240 or 110V switch. It appears that the EU6500 has two inverters to provide 240 and the switch bridges the inverters to provide 110V only. This sparked a thought. As currently connected to the generator via the 30A/240 4 wire receptical, with the 15K AC on, one of the inverters is carrying the AC load running at around 75% of its max rating. If we went to 110V mode, thus bridging the two inverters, wouldn't they both be running at around 40% with the same demand ? equaling less wear and tear? Or, am I over thinking this whole thing and pecking at catchup packets...