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Install Solar - it is reliable, cheap and maintenance free. The idea of a perpetual motion machine with water from a well creating more electricity than it requires to lift it out of a well is really not a practical solution - if it was every city in the world would be powered by wells generating power and fresh water...
Solar panels are cheap, and except for occasional dusting they need no maintenance. Batteries are relatively cheap and LiIon batteries are now becoming mainstream together with sophisticated control units. If you are primarily using the power to run A/C units for cooling you don't even need much battery capacity since all the current draw is during the sunny day.
The site is described as being in a desert - so the idea of using ground-water simply to generate electricity is completely unacceptable even if it was not also impractical.