I fail to see the logic to have an onboard gen set and carry an additional noisy one, especially in a Class C with limited storage.
bumpy
And I fail to see the logic in running the onboard gen for hours to bring the battery to ~90% when the portable gen uses a lot less fuel and is significantly quieter inside the rig. If the onboard generator is fueled with propane, that's an additional reason to avoid using it. If I need the power for a short time I hit the built-in for convenience. When charging the battery for an hour or more, I use an 800 VA inverter gen. The charge rate is limited, but the total charge time isn't a whole lot longer. With unlimited current available the battery pull drops under 30 amps within 20 minutes or so anyway.
