I have seen 1hp brush-less 36 volt DC water pumps. They can be run solar or ac-dc PSU. They are the most efficient low maintenance pump you will ever find. They are just starting to get them into pool pumps with pulse width modulated speed controllers. Bunch of fancy words for DC variable drive or dimming function.

Basically 1hp will give you about 200 feet of head and 23 gallons per minute. Less parts to wear and more torque or lifting power with brushless.

Cheers Don.

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7/8th of an acre, Perch only pond, Ontario, Canada.