I don't know if there are small versions of this, but a spiral pump doesn't take much power. http://lurkertech.com/water/pump/tailer/
To guarantee water in the short run, maybe a large tank and a small generator to run the pump would be the safe choice. If you can store a weeks' worth of water, and something fails, you have time to deal with it.
This place isn't cheap, but they do have the goods for someone way off the grid. http://www.backwoodssolar.com/catalog/pumps.htm