The question is, what will you do when the the fuel runs out, even if you are wise enough to stockpile it? How will you get the water out of the ground, unless you are lucky enough to live near a river/creek/artisan spring? Distilled water is always an an option even if you live near saltwater, too. But, it seems to me, enough solar power to run a well would be a lifeline. It says "Water: Filtration, transport, storage, and treatment options." I'm curious if this book discusses solar at all.
Hand pump? Windmill pump? Ya solar power would last a really long time as long as you had nothing break but that is way not the only option. Oh and I would use the previously mentioned pumps with a well that was put in by hand as the pipe is small diameter and would take less to bring up the water.