I've recently put in a well at our new place. I wanted to have the water system on a separate power system from the house. We ended up with a Grundfos SQFlex pump, a 380W solar array, and a 48V 130AH battery. So far the system has been functioning outstanding! and through the toughest time of the year, a VT winter. We've had plenty of power for the pump and haven't needed to think about rationing water at all (from a power consumption point of view). We choose that pump based on a few recommendations and the low startup amperage, although it was a bit on the pricey side, hopefully we won't have to replace it for sometime.
A couple things to look into while selecting your pump. The wire that you need to run the pump gets big and expensive quickly. We needed 150' of #6 wire to the pump. So depending on the depth your pumps need to be in your well and the distance from the power system... it can add up quick.
Also make sure that the pump has the head requirements for your situation, don't forget the head required for what pressure you need.