Daily water requirement
Volume per day for irrigation, livestock, households or institutions sets the pumping duty.
Solar water pumping
Pump the water you need, powered by the sun.
Boreholes for farms, schools, health facilities and communities often run on expensive diesel. StimaPulse sizes the pump, solar array and storage from your head and daily water demand, and shows the cost per cubic metre.
Total dynamic head
Static water level, drawdown, discharge elevation, pipe friction (Hazen-Williams) and outlet pressure are combined into the head the pump must deliver.
Match pump and motor power
Hydraulic energy and pump efficiency give the electrical power the motor needs, avoiding undersized pumps that cannot reach the tank.
Size the PV array
The array is sized from pump energy, peak sun hours and regional heat and soiling derates.
How solar sizing worksTank or battery
Compare elevated tank storage with battery autonomy for night-time or cloudy-day supply.
Battery storage guideCost per cubic metre
Levelized cost of water and diesel fuel displacement make the comparison with your current pump clear.
Frequently asked questions
How do I size a solar borehole pump?
Start with the daily water volume you need and the total dynamic head: the static water level, drawdown while pumping, the height to the tank or outlet, pipe friction and any required outlet pressure. Pump power follows from flow and head, and the PV array is sized from pump energy and the site's peak sun hours.
What is total dynamic head (TDH)?
TDH is the total height the pump must lift water, including the depth to water while pumping, the elevation to the outlet, friction losses in the pipe and the pressure needed at the outlet. StimaPulse calculates pipe friction using the Hazen-Williams method.
Should I use a water tank or batteries?
Storing water in an elevated tank is usually cheaper and longer-lasting than storing electricity in batteries for pumping. StimaPulse compares tank storage with battery autonomy so you can choose the lower-cost option for your hours of supply.
How much diesel can a solar pump save?
StimaPulse estimates the diesel fuel a solar pump displaces and the levelized cost of water per cubic metre, so you can compare it directly with your current generator running costs.
Get a plan for your site.
Bring a utility bill, load list, fleet schedule or supplier quote. We will turn it into a sized, costed and comparable plan.