One of the units needs to be on the other leg. There are 6000 watts available on each leg. In theory four units could be run, two on each leg.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.