I have been thinking about this one too as I plan eventually to sink a well on my property. I have generators so power is not the problem per se.
Water filtration and cleaning is also a priority and a reverse osmosis system is what I have in mind.
As for electrical power ..ways must be considered to reduce ones usage to minimums and rotate this usage in and out as tasks need to be done.
I have been looking at solar panels recently and have noticed prices coming down somewhat and also that they are available in portable fold up panels
to charge battery banks etc etc.
Curious about something here as to whether any of the readers have any experience in flushing out olde batterys of the scale build up on the plates
and then refilling them with battery acid?? I think In the future I might check this out as to practicality and feasability if batterys become
difficult to acquire.