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Lorentz PS2-4000 Solar Borehole Pump: Centrifugal and Helical Rotor Options
The Lorentz PS2-4000 is the largest and most powerful system in the PS2 range. Its 4.0 kW controller drives pump ends that lift water from as deep as 450 m or move up to 78 m³/h, which makes it the one for deep boreholes, large livestock operations, irrigation and estate water supplies where there is no mains power. It fits boreholes of 4 inches (100 mm) or larger, or 6 inches (150 mm) for the five highest flow centrifugal pump ends. The controller runs from solar panels and has built-in MPPT, which keeps the pump working in poor light, and the pump has a maintenance-free, water-filled brushless DC motor in stainless steel. We supply the PS2-4000 in the UK as authorised Lorentz sales and service partners, and we size every system with Lorentz's own selection software.
There are eleven pump ends. The eight centrifugal ends (C-SJ) cover lifts from 10 to 220 m at 4.2 to 78 m³/h. The three helical rotor ends (HRE) are for the deepest water: the HRE-32 reaches 120 m, the HRE-14HL 180 m and the HRE-05HHL 450 m, at flows between 0.92 and 5.9 m³/h. Choosing between them comes down to the depth of your borehole and the volume of water you need each day.
The PS2-4000 costs from £4,006.52 ex VAT with a centrifugal pump end, and from £3,903.46 ex VAT with a helical rotor (HRE) pump end.
Which PS2-4000 pump end do I need?
The eight centrifugal pump ends cover heads from 10 m up to 220 m and flows from 4.2 to 78 m³/h. The three helical rotor pump ends reach heads of up to 450 m, at flows between 0.92 and 5.9 m³/h. The C-SJ17-4, C-SJ30-2, C-SJ42-2, C-SJ60-1 and C-SJ60-2-2 pump ends need a borehole of at least 6 inches (150 mm), and all the others fit 4 inches (100 mm).
| Pump end | Type | Max head | Max flow | Datasheet |
|---|---|---|---|---|
| C-SJ60-1 | Centrifugal | 10 m | 78 m³/h | C-SJ60-1 datasheet (PDF) |
| C-SJ60-2-2 | Centrifugal | 16 m | 61 m³/h | C-SJ60-2-2 datasheet (PDF) |
| C-SJ42-2 | Centrifugal | 18 m | 53 m³/h | C-SJ42-2 datasheet (PDF) |
| C-SJ30-2 | Centrifugal | 22 m | 44 m³/h | C-SJ30-2 datasheet (PDF) |
| C-SJ17-4 | Centrifugal | 45 m | 26 m³/h | C-SJ17-4 datasheet (PDF) |
| C-SJ8-15 | Centrifugal | 80 m | 13 m³/h | C-SJ8-15 datasheet (PDF) |
| C-SJ5-25 | Centrifugal | 140 m | 7.0 m³/h | C-SJ5-25 datasheet (PDF) |
| C-SJ3-32 | Centrifugal | 220 m | 4.2 m³/h | C-SJ3-32 datasheet (PDF) |
| HRE-32 | Helical rotor | 120 m | 5.9 m³/h | HRE-32 datasheet (PDF) |
| HRE-14HL | Helical rotor | 180 m | 2.6 m³/h | HRE-14HL datasheet (PDF) |
| HRE-05HHL | Helical rotor | 450 m | 0.92 m³/h | HRE-05HHL datasheet (PDF) |
Figures are the maximum for each pump end, from the current Lorentz datasheets (version 310270).
PS2-4000 controller and solar array
The controller handles up to 4.0 kW and accepts up to 375 V from the array, with a motor current of up to 14 A. It needs a maximum power voltage above 238 V, so the panels are normally wired in series strings. It is rated IP68 and works in ambient temperatures from -40 to 50 °C, and the pump can handle water up to 50 °C. The controller has inputs for dry running protection and remote control, an integrated sun sensor, and it is protected against reverse polarity, overload and over-temperature.
About 99% of the pump systems we supply run direct from the panels with no battery. The controller is roughly 350 mm high and 207 mm wide, and weighs 4.6 kg. The pump unit, which is the motor and pump end, weighs between 14 and 20 kg depending on the pump end. The size of the array depends on the pump end, the head and the volume of water you need each day.
What is included, and what you need to add
The PS2-4000 price covers the controller and the pump unit, which is the motor and your chosen pump end. You will also need solar panels and mounting, a rising main and a storage tank, and we can quote for the panels and mounting as well. Cable between the controller and the pump is supplied if you need it, and is quoted by length. Sensors are optional extras. The Lorentz PS2 installation manual is available to download as a PDF.
Pump sizing with Lorentz software
Sizing is free. We size every pump with Lorentz's own selection software, using the details you give us, and the result is an estimate of performance based on that data. It is not a guarantee of output. We supply the equipment, and the installation is carried out by you or your installer.
To size your pump we need the borehole depth and internal diameter, the water level, the height the water must be lifted to and how far it travels, and the volume of water you need each day. Send those details through our solar pump enquiry form. For more on choosing a pump, see our guide to solar borehole and well pumps.
PS2-4000 solar pump FAQs
How deep can a PS2-4000 pump?
Up to 450 m with the HRE-05HHL pump end, which delivers about 0.92 m³/h at that lift. The centrifugal ends reach 220 m, with the highest flows.
Will the PS2-4000 fit my borehole?
Yes, if the internal diameter is 4 inches (100 mm) or more, or 6 inches (150 mm) or more for the C-SJ17-4, C-SJ30-2, C-SJ42-2, C-SJ60-1 and C-SJ60-2-2 pump ends.
What is the difference between the PS2-4000 and the PS2-1800?
The PS2-4000 has the larger 4.0 kW controller, and the highest flow and deepest lift in the range. For smaller flows or shallower lifts the PS2-1800 is the usual choice.
Does the pump end change the price?
Slightly. The PS2-4000 costs from £4,006.52 ex VAT with a centrifugal pump end, and from £3,903.46 ex VAT with a helical rotor pump end.
Tell us your borehole depth, water level and daily water demand, and we will size the pump and pump end with Lorentz's selection software before we quote.
