Leeson 3/4 HP DC motor, ETA Adapter, 1.5 HP pool pump that circulates 26,000 gallons per day in a 14 ft. by 28 ft. pool.  Located at Lane & Ursula Garretts' home in Scottsdale, AZ.  The PV Powered pool pumping system has paid for itself more than 3 times over, since installed in 1980.

660 Watts of PV power that runs the pool pump shown in the previous picture.  ZomeWorks Tracker with 6 AstroPower modules.  Considerably less expensive now, systems of this type, are giving 20% or more tax-free return on the installed cost.