At my Mt Best residence I collect and store rainwater at the top of a hill some 30m above my house and garden and this enables me to avoid using pumps.
For my friends and neighbors, who do not have a suitable hill nearby, I designed an efficient water pumping solution that utilizes a 3-phase motor, efficient multistage pump and a large (300L-450L) pressurized water tank. An example of my installation is depicted below.
Features of the 3-phase pump + large pressure tank solution are:
3 phase motors are cheaper, more efficient than 1-phase motors and can be started without a power hike. Given limited off-grid power supply, 3-phase inverter soft-start solution allows using more powerful motors and better pumps than a single-phase solution.
Single phase to 3 phase inverter is used to power 3-phase motor. Inverter is programmable and allows pump speed control. Above photo shows request to supply 3-phase motor with 55Hz.