Interesting post Jon.

We do the exact opposite it seems.

First off, I dislike hot places, so we rarely need the AC. The house bank is plenty adequate for everything we use in the bus for an afternoon or evening stop. We do need the generator for a little while if we happen to use the cooktop which only operates on 220 volts. If we run the generator for that for a half hour or so, that again tops up the batteries.

If it is cold out, we have the Webasto running, it keeps us very toasty and is way more efficient than running the generator and the heat pumps or the toe kick heaters.

We often have the windows open when we stop, generator noise would then be a negative.

The big alternator on the Detroit charges the batteries way faster than the generator. I see 90 amps going into the batteries from the generator, and 270 from the engine. I see no reason the batteries need to be fully charged if we are planning to drive anyway.

I often run the generator a while longer than we need it just to get it warmed up thoroughly not so much because we need the power.

Neither way is better, just depends on your style I suppose.