Grundfos SQ Flex SQ AC Series
This is the ultimate submersible pump for water lifts of up to 525 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. And with Grundfos, you know it is built to last and is maintenance-free. Some SQFlex pumps will fit into a 3" well.
Seven pump models can deliver from 4 gpm at 525 feet to 50 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.
The SQFlex pump can run on a solar arrays starting at 129 watts. The array must have an operating voltage over 30 volts. The array can be made of any combination of 3 or more 12-volt nominal modules in series or 2 or more 24-volt nominal module.
SQFlex pumps have a 1 year warranty from the date of purchase. A 5 year extended warranty is available separately.
Grundfos also has a specially designed Whisper 200, 1kW wind generator with 150VDC output for applications using wind power. Please contact us for information.
Poly pipe in rolls is acceptable instead of rigid pvc or galvanized, because the slow-start feature of the motor reduces startup torque and twisting of the pipe.
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.
Use the table to choose a pump. Left column shows total head in feet and meters. The top row shows array wattage/number and suggested type of modules. Boxes show seasonal pump performance and maximum flow as shown here:
Select the row with the head (total lift) that most closely matches your application. Move across the row to the column that contains the desired daily volume or peak flow rate. Note the pump model in that block and wattage of the PV array in that column.Questions? Comments & Quotes sales@AzSolarUtility.com
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22,040
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= Estimated daily summer volume (GPD)
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14,630
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= Estimated daily winter volume (GPD)
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NOTE: Daily volume and flow calculations are based on 38° north latitude location, fixed array tilt of 38° and 4.5 kWH/m2 (POA) winter, and 7.5 kWH/m2 (POA) summer solar insolation. The pump model is optimized for summer operation. Up to 40% more water can be pumped in the summer if the array is on a tracking mount. The output can vary with different locations and years, and is not guaranteed.
