Submersible Pump Sizing


Pump model selection and size number and configuration of solar panels depends on total dynamic pumping head, and volume to be pumped PER DAY.

The pumping head is firstly the vertical height ( lift) from the water level in the borehole, to the highest point of pumping above ground ( discharge point of the water).

If there is further pressure required at the discharge point ( for example pressure needed by irrigation sprayer nozzles) this needs to be added to the pumping head

Also, the pipe length from the pump to the point of water delivery and bends in the pipe add frictional head to the system. For shorter pipe lengths ( less than about 300m, depending on pipe diameter and flow rates) this may not be significant, but for long transmissions over say kilometres and/or high flow volumes this has to be taken into account.


To facilitate pump selection and solar array sizing, please complete the QUESTIONAIRE form here

Alternatively the form can be downloaded at: Solar Pump System Questionaire ( PDF format), or Solar Pump System Questionaire ( DOC format)

For completion and return to us via fax or email.

You may wish to download the pump system layout diagram mentioned below, which explains various parameters in the form.

Solar PV Panels


Solarworld SW245, 245Wp R3060.00 excl VAT
Solarworld SW180, 180Wp R2245.00 excl VAT
Solarworld SW145, 145Wp  R1810.00 excl VAT
Solarworld SW80, 80Wp R1020.00 excl VAT
Lorentz LC80, 80Wp R1060.00 excl VAT
Lorentz LC185, 185W R2220.00 excl VAT
Lorentz LC250, 250W R2870.00 excl VAT

Terms and Conditions apply – click here

Lorentz Solar Water Pumps

  • Submersible pumps to lift water from boreholes, dams and rivers for drinking water, irrigation applications etc
  • Surface pumps for swimming pool filtration & circulation, pond management, irrigation