My question is the underlying reason you are doing this. I know you must be doing it to solve some issue and I would like to know what that is. If it is keeping the batteries charged, you would be MUCH better off running the generator for a couple of hours then shutting it down and running it for a couple more hours. Generators have a load on them when they are recharging the batteries and providing power to the coach. The engine, by comparison, has virtually no load on it. It is a good idea to minimize the amount of time a diesel engine is idled. The owners manual will typically warn you to minimize idling. The generator engine runs at a constant speed (typically 1800 -2400 rpm depending on the generator) and uses significantly less fuel per hour than the 8V92.
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