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Grundfos SQF Pump
This is the ultimate submersible pump for water lifts of up to 650 feet. They 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 of at least 30 volts, but their efficiency will be much higher at voltages over 100 VDC. The motor is designed to draw a maximum of 8.4 amps, which means that many types of PV modules can be used efficiently, including 60 cell modules with outputs up to 260 nameplate watts. SQFlex 3SQF through 11SQF pumps will fit into a 3" well.
Eleven pump models can deliver from 82 gpm at 6 feet of head to 4 gpm at 800 feet with a 1.6 kilowatt solar array or less. Helical rotor pumps (models 3, 6 and 11) for high head applications and centrifugal pumps (models 16, 25, 40, and 60) for low head applications assure a pump that is efficient for any use. The SQFlex has built-in protection from dry-running, overloading, and overheating.
SQFlex pumps have a 2 year warranty from the date of purchase.
A 5 year extended warranty is available separately and highly recommended.
The Whisper 200-120 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. Since the CU200 control circuit uses only 15 milliamps, the water level switch can be located in a tank that is as far away as 1,640 feet from the pump, using a minimum 18ga two conductor wire. Two year warranty.
The IO 50 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 (120V only), 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.
