From the instantaneous performance curves of the pumps, the quantity of water in m³/h for a given power input in Watt and head in meters / ft can be found. Daily Flow rate: Multiply the hourly flow rate of the selected lift and power input of the pump with the peak sun hours of your location. Add 30 to 40% Daily peak flow hours if a tracking system is used to mount the solar array. For these large solar pumps it is strongly recommended as it reduced the water cost considerably. Ask for ETATRACK information.

Add about 30% to the DC power to account for dirt, heat, cable and other losses of the solar array.

Max power for the selected pump is 3300 Watt. 3300Watt / 0.7 = 4700 Wp for the min. recommended solar array size. Choose the solar array that meets the Voltage requirements of the system: With a 175 Solar module 28pc = 4900Wp the system can be operated. A tracking array is strongly recommended.

Use a SUN SWITCH to start the pump when the available solar radiation is big enough for your application. Especially drip irrigation systems require a min. flow rate to operate all drippers. Our SUN SWITCH is the right choice for this.

A variety of Centrifugal multistage direct coupled pump ends on LORENTZ brushless submersible motors. The pumps are made from AISI 304 stainless steel with water lubricated rubber bearings. A non return valve is included. Sand content: 50ppm, a higher content will reduce the pump life considerably due to wear. pH value: 5-9 Salt content 300- 500ppm at max 30°C ( 85F), higher salt contents require lower water temperatures.

The submersible motor, ECDRIVE 4000-C is a 2 pole synchronous brushless DC motor. Slide ring bearing and ceramic trust bearings are water lubricated. The motor raw earth magnets are hermetically sealed in stainless steel and encapsulated in synthetic resin. The motor is pressure compensated and there are no practical depth limitations for submergence. No electronics are inside the motor and the entire motor is water filled.

• Voltage: 240V-EC electronically commutated, sensor less
• Power: 3.5kW / 4.6HP, nmax = 3300 RPM
• Temperature water max. : 40 °C / 100F
• Start/Stop: no limitation on number of start/stop per h
• Efficiency: 92% max

Mounted at surface, Well probe and float switch terminals, MPPT ( max. power point tracking) Overload, temperature and reverse polarity protected Pump Speed control from 30% to full LED’s indicate, pump speed water level, overload etc. 7-8 standard 24V modules can be connected in series. Umax= 375VDC Ambient temperature: -30°C to + 45°C (-20F to +115F) Weight: 6kg