Her reluctance is more about "Not knowing": than anything else.
An inverter takes 12 volt DC power; and turns it into 120 volt AC
(At least that's how I understand it...
)
Your house batteries will run the basic stuff that you need out in the wilds: you'll just have to run the generator once in a while to keep them charged-up.
The better and the more batteries you have: the longer they will last.... OR: the the more stuff you can get hooked up into the inverter, and be made to run!
You can augment the Battery power with Solar power... but that's an entirely different conversation!
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