yes, the AGS is a wonderful tool in making the 'off grid' experience pleasant and without much worry or concern about battery levels...once you get used to it, how it works, and the best use during your 'off grid' times, you'll find it indispensable....
as for 120v power, for the fridge, and any and all outlets that are powered by the inverter while you are 'off grid', there are only three ways to continue providing power:
Batteries(via the Inverter)
Generator
or Solar(to charge the batteries and extend the Inverter's power range)
...in your case, running the generator an hour in the morning, and an hour in the evening, to bring the batteries back close to full charge, is the easiest, even though it's the normal 'concern' of most RVrs not have to run the generator more than needed.
Another option is more batteries - giving you more 'silent' time before needing the Gen.
and of course, there's Solar power, and while many RVrs deploy these systems while camping, the upfront expense is rather high, and being subject to sunlight for only several hours a day doesn't really help you during the 'overnight' hours as much as you might imagine, or hope.
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