I think I missed something in the other thread
But their is a big difference in going off grid and trying to maintain the power use that matches having shore power
And just preparing for an emergency use, for a few days or weeks
The first requires extensive battery bank, and recharge capabilities
The second just need a couple good batteries and a generator and some stored fuel
Solar during the day and shore at night ?
Well maybe if you have expensive meter electric in a park, and use l.p. For heat
And the shore electric keeps the batteries charged over night
If you have shore power full time, it will take the solar a long time to recoup the install costs
Much different than being off grid where solar saves fuel costs