Grundfos SQFlex pumps
Submersible pumps that are compatible with renewable and traditional energy sources.
The Grundfos SQFlex pumps are a range of submersible pumps that are compatible with energy from renewable and traditional sources, which make them suitable for off-grid water pumping systems. The pumps are submersible helical rotor and centrifugal pumps that can receive almost any AC or DC power supply, and are commonly used as a solar pump. The SQFlex pumps operate in a wide range of conditions, up to over 200 m of head and over 80 m3/hr. with 100 watts to 1700 watts.
The product is available through local distributors worldwide.
Pricing of SQFlex pumps varies by distributor, but cost approximately 2,300 USD.
Goal 6: Clean water and sanitation
Water users in areas that do not have reliable access to an electrical grid.
Pumps are available through a worldwide network of distributors.
Description of the pump type
Power required, measured in watts
Manufacturer-specified discharge rate, measured at a specific head
Maximum depth of water the pump can pull
Piston nominal diameter, measured in centimeters
The SQFlex pump series is a range of submersible pumps that are designed to receive a wide range of energy sources including solar, wind, generator, and grid electricity. This is made possible because the pumps can accept AC (90 V-240 V) and DC (30 V-300 V) power. The product includes built-in voltage protection, overheating protection, and dry run protection. A non-return valve is located at the top of the pump to prevent backflow into the well. There are eleven different pump models to select from, depending on the water table depths and required flow rate for users.
Schematic by Grundfos.
Technical support may be provided by local distributors or directly by Grundfos.
The SQFlex pumps are designed to utilize a wide range of energy sources, especially renewable energy sources, while maintaining strong performance and durability.
No known safety hazards are related to this product.
Each SQFlex pumping system consists of a combination of some of the following components: SQFlex pump, solar panels, wind turbine, generator, batteries, charge controller, switch box, control unit, pressure tank, pressure switch, and float switch. Connections between these components will be made using appropriate piping and/or electrical wiring.
Tiwari, Arunendra K., Kalamkar, Vilas R., 2016, “Performance investigations of solar water pumping system using helical pump under the outdoor condition of Nagpur, India,” Renewable Energy, 97, pp. 737-745.
Salilih, Elias M., Birhane, Yilma T., Arshi, Sofiya H., 2020, “Performance analysis of DC type variable speed solar pumping system under various pumping heads,” Solar Energy, 208, pp. 1039-1047.
Granich, William Anthony, 2009, A renewable energy feasibility study to power a water supply pump in Sacala las Lomas, Guatemala, Masters Theses, Missouri University of Science and Technology, Rolla, MO.
Grundfos holds three ISO certifications.
Grundfos also meets the Minimum Energy Performance Standards (MEPS) in Australia and the National Electrical Manufacturers Association (NEMA) standards in the USA.
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