Grundfos 11 SQF-2 SQFlex Submersible Solar Pump

Regular Price: $2,328.93
ONLY: $2,085.85
Item Number: 95027416

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Grundfos SQFlex 11 SQF-2 Solar Submersible Pump

Grundfos is one of the world's largest manufacturers of pumps, providing water for homes, farms, commercial buildings, and industrial uses. Featuring unique stainless steel construction and the latest in electronics, Grundfos pumps are recognized for reliability and value throughout world-wide -- wherever water moves. Grundfos maintains an extensive network of manufacturer representatives, distributors, and dealers to serve customers nationwide.

SQFlex pumps
The complete SQFlex pump range consists of 7 different pump sizes: 4 centrifugal and 3 helical rotor pumps. All pumps are fitted with the same size motor which, together with the new sizing tools, makes system sizing simple. The SQFlex system is a reliable water supply system especially suitable for remote locations not connected to the electricity supply grid. The SQFlex system is equipped with the SQF submersible pump.

The SQFlex system is a reliable water supply system based on renewable energy sources, such as solar and wind energy. The SQFlex system is equipped with the SQF submersible pump. Very flexible as to its energy supply and performance, the SQFlex system can be combined and adapted to any need according to the conditions at the installation site.

The SQFlex system is equipped with the SQF submersible pump. Very flexible as to its energy supply and performance, the SQFlex system can be combined and adapted to any need according to the conditions at the installation site.

TDH Range (Ft.): 40 - 300
Nominal GPM: 11
Output Size: 1 1/4" NPT
Pump Type: Helical Rotor

Potential SQ Flex applications include:

* Livestock watering
* Remote Homes
* National/State Parks
* Irrigation
* Remote Camps
* In locations where power is scarce and water is a necessity.

In the middle of nowhere, the only things you can depend upon are air and daylight. The SQFlex pump is fully operational from only one or, for greater peace-of-mind, a combination of these energy sources. SQFlex Solar and Wind systems are reliable, low-maintenance and cost-effective. In addition, the systems are sustainable and totally environmentally sound.

The optional system components are:

* SQF submersible pump
* CU 200 control unit
* IO 100 and IO 101 switch boxes
* IO 102 breaker box
* Energy supply:
o solar panels
o wind turbine
o generator
o batteries

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!

Supply to pump 1 x 90 - 240 V –10%/+6%, 50/60 Hz. 30 - 300 VDC.
Run-up time Depending on power 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 an external water level electrode. - Overvoltage and under voltage. - Overload. - Over temperature.
Sound pressure level The sound pressure level is lower than the limiting values stated in the EEC Machinery Directive.
Radio noise SQF comply with EMC Directive 89/336/EEC. Approved according to EN 50081-1 and 50082-2.
Reset function SQF can be reset via CU 200 or by disconnecting the power from the power supply in 1 minute.
Power factor PF = 1.

Operation via generator

Voltage: 230 VAC, –10%/+6.;

It is recommended that the generator output must be equal to the motor input power P1 [kW] plus 50%. Minimum: P1 [kW] plus 50%.

If the pump is connected to an electrical installation where an earth-leakage circuit breaker

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 SQF 0.6, SQ 1.2, SQF 2.5: Minimum: 76 mm. SQF 5A, SQF 8A, SQF 14A: Minimum: 104 mm.
Installation depth Min.: The pump must be totally submerged in the pumped liquid. Max.: 150 m below the static water table (15 bar).
Strainer Holes of the strainer:

SQF 0.6, SQF 1.2, SQF 2.5: ø2.3 mm. SQF 5A: ø2.5 mm.  SQF 8A, SQF 14A: 4 mm x 20 mm.

Pumped liquids pH 5 to 9. Sand content up to 50 g/m³.
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 2 year warranty from the date of purchase. A 5 year extended warranty is available separately.

Grundofs 11 SQF-2 SQFlex Pump Performance Curve


Wiring diagram for pump


Connection of the MSF motor to the power supply must  be done according to the wiring diagram shown below. As the intelligent motor electronics can handle both connection possibilities, it makes no difference how the wires "+" and "–" or "N" and L" are connected




                 30 - 300 VDC                                 1 x 90 - 240 V


Grundfos Sqflex Helical Rotor Pump, 11 Gpm, 11-Sqf


Product Reviews

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(6 Ratings, 1 Review) Average Rating:
Superior Pump
Mike (North Central Nebraska) 11/9/2018 9:49 AM
Just purchasing my 4th 11SQF pump. I've run my oldest one since 2013 with out one hiccup and that's one I set up as a portable unit. Over the course of a year, it gets pulled and moved to at least 3 different stock wells. Pumps plenty of water for 300+ cows, assuming you have enough stock tank storage. There are times when we don't get enough daylight hours in the winter and I've hooked up the pump to my generator at 110 volts...only takes a couple hours to fill an 11' tank. I have 2 with controllers and one set up on a float but have since just used 110v plugs to turn them on and off (never do that with a Lorentz). The final advantage to these pumps is that they will fit down an old 3" stock well just fine--can't do that with any other solar pump on the market that I know of. They won't pump quite as much water as a Lorentz at peak time but over the course of a day, they will actually pump more because of their variable voltage allowing them to run on less sunlight earlier in the morning, later in the evening, and overcast days.