We pump about 6,400 gallons a day from 3 wells with tracked solar arrays and a experimental diesel.
Our current fuel consumption is 4 hours per gallon with about a 1,000 watt load (grundfos submersible with 260' of head or 113 PSI) using an early kubota water cooled two cylinder engine and a 4KW meccalte generator head. My current interest is to improve on this....so Ive combined an early air cooled single yamaha diesel to a ST-5 chinese head. (i call it my frankenstein generator). Last night i ran this 4 pole head at about 1800RPM for 13 hours on 1.75 gallons of diesel. Same load but no power robbing water pump or electric radiator fan. Since I'm still in shock about the numbers...i'm repeating the test tonight. We operate an off-grid fruit farm and would like to share our information and experience. Pictures on request...till I can figure out how to post them.