PS2 is the LORENTZ platform for small and medium solar pumping: an integrated system where the controller, the ECDRIVE motor and the pump end are engineered together. It lifts water from as deep as 450 m, moves up to 60 m³/h with its surface pumps, and manages itself through sensors and software. Here is how the system is built and how to specify it.

Three matched building blocks

• The PS2 controller drives the motor with pump-specific MPPT algorithms, hosts every input the installation needs, logs up to ten years of data and carries the water application software: constant pressure, constant flow, level control, timers.
• The ECDRIVE motor is a brushless, sensorless DC motor built for solar duty: very high efficiency across the whole speed range (600 to 3,300 rpm), gentle start, no stop/start restrictions, AISI 304 stainless, IP68 to 150 m submersion.
• The pump ends match the hydraulics to the duty: 4" helical rotor for deep boreholes and low flows, multistage centrifugal in 4" to 6" for volume, vertical multistage and single-stage ends for surface duty, plus dedicated pool pumps.

The five controllers

All five share the same envelope: 98 percent maximum efficiency, IP68 pressure-cast aluminium housing for outdoor mounting, and full-power operation at ambient temperatures up to 50 °C with active power management above. Protection against reverse polarity, overload, motor short circuit and over-temperature is built in.

Everything is an input

PS2 carries eight sensor inputs and the application software to use them: well probe for dry-running protection, tank-full switch, two 4-20 mA analogue inputs for pressure and level, a pulse water meter input for accurate flow data, wet electrodes for pipeline sensing, and a signal output to drive external devices. The supplied SunSensor measures irradiation and stops unnecessary start/stop cycles in marginal light. Commissioning happens in the free PumpScanner app: LORENTZ pumps are preconfigured, a standard setup takes three clicks.

What PS2 does in the field

The envelope covers most of the solar pumping market: drip, sprinkler and flood irrigation, livestock watering where even a PS2-150 waters a herd from 15 m with a 0.6 kWp array, village drinking water around storage tanks, and swimming pools with the dedicated PS2 pool pumps.

Night and backup: the PowerPack

Where the schedule demands pumping beyond the solar day, the PowerPack accessory feeds the PS2 from the grid or a diesel generator. The system stays solar-first and simply gains a second source, without replacing any component. For most duties, though, an elevated tank remains the cheapest night supply there is.

PS2 equipment at SINES Export

Frequently asked questions