Grundfos SQFlex 11 SQF-2 Solar Submersible Pump

Grundfos SQFlex 11 SQF-2 Solar Submersible Pump

Model: 075-01018

Price: $2,733.00 $1,847.00 

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Grundfos SQFlex 11 SQF-2 Solar Submersible Pump

The Grundfos SQFlex solar pumps can be directly powered by solar or wind power or can be run on an inverter, a generator, a battery or the utility grid, or any combination of these sources. Virtually any source of power, 30-300 VDC and 90-240 VAC, can be used to run the pump. They can operate on a series string of PV modules with a total peak power voltage over 30 volts, but the pumps efficiency will be much higher at voltages over 100 VDC. SQFlex 3 and 6 pumps will fit into a 3" well.

Seven pump models can deliver from 2 gpm at 600 feet to 65 gpm at 20 feet of head with a 1 kilowatt solar array or less. Helical rotor pumps (models 3, 6 and 11) for high head applications and centrifugal pumps for low head applications assure a pump that is efficient for any use. The SQFlex has built-in protection from dry-running, overload and overheating.

SQFlex submersible pumps have a 2 year warranty from the date of purchase. A 5 year extended warranty is available separately.

The Whisper 200-150 V wind generator can be connected directly to an SQFlex pump. Please contact us for information.

Optional Controls

The CU200 interface box communicates with the pump and monitors operating conditions. Built-in diagnostics indicate faults and dry-running, display operating status, power consumption and water level switch input. The water level switch interfaces with the CU200 control to turn off the pump when a tank is full.

The IO100 is a simple control box with cable terminations and a manual on/off switch. It is a great interface between a solar array and the pump to allow you to turn off the high voltage array when working on the pump.

The IO101 is an interface for using AC backup on a solar pump. An automatic transfer switch disconnects the solar array when AC power from a generator, utility connection or inverter is present. When AC power stops, it automatically reconnects the array to let the sun continue pumping.

The IO102 interface unit is used for systems powered exclusively by a wind turbine or by a combination of wind and PV.

You can use several controls if you need more features than one control can provide.

The SQFlex pumps will not function with a GFCI in the supply circuit, and should not be used where a GFCI is required.

The 3 SQF, 6 SQF, and the 11SQF are helical rotor type pumps. All others are centrifugal. All SQF pumps are 17 to 23 pounds in actual weight.

Model Number Type Max Head Max Flow PV Watts (Min-Max) ** Pump Diameter (Pipe Size)
3 SQF-2 Helical Rotor 360 Feet 3 GPM 100-340 3" (1" NPT)
3 SQF-3 Helical Rotor 600 Feet 2 GPM 130-600 3" (1" NPT)
6 SQF-2 Helical Rotor 360 Feet 6 GPM 100-650 3" (1" NPT)
11 SQF-2 Helical Rotor 300 Feet 11 GPM 50-900 3" (1-1/4" NPT)
16 SQF-10 Centrifugal 210 Feet 20 GPM 400-1400 4" (1-1/4" NPT)
25 SQF-3 Centrifugal 45 Feet 40 GPM 120-760 4" (1-1/2" NPT)
25 SQF-6 Centrifugal 90 Feet 39 GPM 130-1400 4" (1-1/2" NPT)
40 SQF-3 Centrifugal 45 Feet 38 GPM 200-800 4" (2" NPT)
40 SQF-5 Centrifugal 90 Feet 70 GPM 300-1400 4" (2" NPT)
60 SQF-3 Centrifugal 45 Feet 85 GPM 20-1400 4" (2" NPT)


Features of the Grundfos 11 SQF-2 SQFlex Solar Pump:

Dry-Running Protection: This unique feature shuts down the pump if it detects water shortage. Every SQFlex pump comes standard with this sensor pre-installed, protecting the well from being over-pumped and the pump from damage.

Helical Rotor Pump (3"): Designed to pump high levels very efficiently, these models allow pumping levels as deep as 820 ft. The 3 in. diameter allows the pump to go in installations where others can't.

Centrifugal Pump (4"): Based on Grundfos' 40 years of experience in submersible pumps, these models are capable of providing high flows, up to 80 gal/min, at moderate heads.

Materials: All Stainless steel for long pump life.

Motor: Only one motor size covers the entire pump range. Designed for peak efficiency and complete reliability, the motor features integrated electronics, eliminating the need for complicated external controls.

Motor Protection: Built in protections against over-temperature, overload, and over and under-voltage for reliability, as well as two-way communication with a control box to alert you in case there's a problem.

Any Voltage: The motor can operate under any voltage from 30 - 300 VDC and 90 - 240 VAC without additional controls, making sizing and installation easy, even as a retrofit to existing installations. AC power capabilities mean every SQFlex pump has the ability to use an AC generator for backup power.

Simple installation
Reliable water supply
Virtually no maintenance
Cost-efficient pumping every day!

Technical Data SQF Pump
Power supply to pump 30-300 VDC, PE.
1 x 90-240 V 10%/+6%, 50/60 Hz, PE.
Run-up time Depends on the energy source.
Start/stop No limitation to the number of starts/stops per hour.
Enclosure class IP 68.

Motor protection Built into the pump. Protection against
dry running by means of a water level electrode
overvoltage and undervoltage

Conductivity 70 s/cm (micro siemens).
Sound pressure level The sound pressure level of the pump is lower than the limiting values stated in the EC Machinery Directive.
Radio noise The SQF complies with the EMC Directive 89/336/EEC. Approved according to the standards EN 61000-6-2 and EN 61000-6-3.
Reset function The SQF can be reset via the CU 200 or by disconnecting the power supply for 1 minute.
Power factor PF = 1.
Operation via generator Voltage: 230 VAC 10%/+6%.
The generator output must be
minimum 1000 W (helical rotor pumps)
minimum 1500 W (centrifugal pumps).

Earth-leakage circuit breaker If the pump is connected to an electric installation where an earth-leakage circuit breaker (ELCB) is used as an additional protection, this circuit breaker must trip out when earth fault currents with DC content (pulsating DC) occur.
Borehole diameter 3 SQF, 6 SQF, 11 SQF: Minimum: 3 in.
16 SQF, 25 SQF, 40 SQF, 60 SQF: Minimum: 4 in.
Installation depth Minimum: The pump must be completely submerged in the pumped liquid. Maximum: 500 ft below the static water table (220 psi).
Suction strainer Holes of the suction strainer: 3 SQF, 6 SQF, 11 SQF: ø0.090 in.
16 SQF, 25 SQF: ø0.10 in.
40 SQF, 60 SQF: 0.16 in x 0.80 in.
Pumped liquids pH 5 to 9. Sand content up to 50 ppm.
Marking CE.
Note: Specifications and pricing of the Grundfos 11 SQF-2 SQFlex Solar Pump subject to change without notice. Illustrations and descriptions of the Grundfos 11 SQF-2 SQFlex Solar Pump do not claim to be complete. SQFlex pumps have a 1 year warranty from the date of purchase. A 5 year extended warranty is available separately.

Pump Type: Helical Rotor




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