The right solar pump is the one that supplies the required water at the actual site conditions. A motor wattage or borehole depth on its own cannot establish that.
Write down the water requirement
Start with litres per day, the water source and the intended use. Irrigation schedules, livestock and household demand may create different peaks. Establish how much water is available from the source before deciding how much to pump.
Ask for a duty-point assessment
The design needs total dynamic head, which includes vertical lift and pipe friction, together with the required flow. Source water level while pumping, pipe diameter, pipe length and tank elevation all affect the duty point. Ask to see the pump curve and the proposed operating range.
Consider storing water
Where practical, daytime pumping into a suitable tank may reduce the need to store electricity for night pumping. The decision depends on site layout, water quality and demand. Have a qualified specialist confirm the pump, controller, array and protective measures together.
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