Well, mystery solved! Last summer, when dry camping, I had enabled the AGS. I've used the motorhome many times since but always on electricity, even when at home.
When I put it in storage I didn't think to disable the AGS so when the batteries dropped below the preset level (11.8 volts which I established for the fridge) the generator kicked in to charge the batteries. The problem is, with the use/store switch set to store, the batteries will NOT charge so the generator never shuts off.
So I've learned...NEVER use the AGS when your RV is set to store.
I have now added that to my checklist when putting it away for the winter. Make sure the AGS is set to DISABLE.
The simplest solution is usually the right answer.
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