Lorentz PS2-150 Solar Borehole Pump and Controller

Lorentz PS2-150 Solar Borehole Pump: Centrifugal and Helical Rotor Options

The Lorentz PS2-150 is the smallest pump in the PS2 range, made for small boreholes and wells where you only need a modest volume of water. It suits a stock trough, a drinking water supply or a few irrigation beds where there is no mains power. The helical rotor pump ends fit narrow boreholes from 3.5 inches (89 mm), and the centrifugal ends need 4 inches (100 mm) or larger. Its 0.3 kW controller works from a low voltage array of up to 50 V, so the solar array can be small and simple. 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 PS2-150 in the UK as authorised Lorentz sales and service partners, and we size every system with Lorentz's own selection software.

Like every PS2 system, the PS2-150 is a controller, a motor and a pump end, and the pump end decides what you get. Here the choice is simple. The two centrifugal ends (C-SJ) give the most water, up to 6.1 m³/h, but only lift 12 to 20 m. The two helical rotor ends (AHR) give 0.77 to 1.4 m³/h and can lift 60 m. Lift and flow trade against each other, so tell us how deep the water is and how much you need each day.

The PS2-150 costs from £1,697.46 ex VAT with a centrifugal pump end, and from £1,974.28 ex VAT with a helical rotor (AHR) pump end.

Which PS2-150 pump end do I need?

The two centrifugal pump ends reach heads of 12 m and 20 m, at flows of 6.1 and 4.6 m³/h. The two helical rotor pump ends both reach heads of 60 m, at flows of 0.77 and 1.4 m³/h.

Figures are the maximum for each pump end, from the current Lorentz datasheets (version 310270).

PS2-150 controller and solar array

The controller handles up to 0.30 kW and accepts up to 50 V from the array, with a motor current of up to 22 A. It needs a maximum power voltage above 17 V, so the panels are wired to suit. 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, and it is protected against reverse polarity, overload and over-temperature.

The PS2-150 can also run from a battery, with a built-in low voltage disconnect, although about 99% of the pump systems we supply run direct from the panels with no battery. The controller is roughly 350 mm high, 207 mm wide and 124 mm deep, and weighs 4.1 kg. The pump unit, which is the motor and pump end, weighs between 8.4 and 11 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 PS2-150 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.

PS2-150 solar pump FAQs

Can a PS2-150 supply a stock trough?

Usually, yes. It depends on the volume of water the animals drink each day and how high the water has to be lifted, and our sizing works that out from your figures. For a trough with a modest lift, a centrifugal pump end gives the most water, up to 6.1 m³/h.

How big a solar array does the PS2-150 need?

A small one. The controller handles up to 0.3 kW and accepts up to 50 V from the array, so it is compact next to the larger PS2 systems. The exact size depends on the pump end, the head and the volume of water you need, and our sizing gives you the figure.

What is the difference between the PS2-150 and the PS2-200?

Both have 0.3 kW controllers. The PS2-150 runs from a lower voltage array, up to 50 V, and has the highest flow centrifugal ends. The PS2-200 accepts up to 100 V and has four helical rotor ends for lifts up to 50 m. Send us your site details and we will confirm which suits you.

Do I need batteries for the PS2-150?

Usually not. The pump runs directly from the panels, so output is highest in summer and lower in winter, and most systems pump into a storage tank that supplies water when the sun is down. The Lorentz controllers can also run from batteries if you need water outside daylight hours.