Why are Solar Water Pumps not specified in Horsepower, Watts or Kilowatts?

Although solar pump motors and controllers have nominal power ratings, the power at which solar pumps operate are variable. This  depends on the solar array size,  and time of day ( sun radiation intensity varies over course of the day),  and factors such as temperature, pump geometry and dynamic head of  the application.

It is therefore not possible to make direct comparison between conventional electric pumps and solar pumps, in terms of horsepower or Kw rating. A quotation request to replace an  xxx KW electric pump with a solar pump is generally not possible, unless the required pumping parameters are specified. ( volume per day and pumping head)

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

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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