Our coach has a Xantrex Freedom PSW 3000w inverter... so different from yours. Our inverter has a "Power Sharing" (PS) setting that tells the inverter how much power it is allowed to pull from its supply leg coming from either the generator or shore power. Our PS setting can be set to 5, 10, 15, 20, 25, or 30 amps. I believe this setting has no effect on the pass-through amperage. When we dry camp at a BLM STVA or rest stop, for example, we do not use the coach's onboard 12.5kw QD unless we need to run the ACs. In our toad, we carry a 3000w Honda generator that I hook to the coach's shore power cord and it just runs for hours and hours and is very quiet. When running the little Honda generator, I set the inverter's PS setting down to PS20 or so. This assures me that the Honda generator will not be asked to provide more amps than it's capable of which will cause its breaker to kick out. In the event that we in the coach turn on too many electrical devices, for example, microwave, coffee pot, hairdryer, etc., that would exceed the PS setting, then the inverter will pull the extra power demand it needs from the batteries, not the little Honda. After the extra power demand is turned off, then the Honda will recharge the batteries, albeit more slowly than the 12.5kw QD would do it. Overnight, I usually set the PS setting down to PS10 or PS15 so that the Honda cannot burn too much gasoline. The Honda can run continuously for 16 to 20 hours on one 3.6 gallon tank fill.