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High Volume Solar Water Pump Selection Chart

Estimated Water Production from Grundfos SQFlex Pumps
(Summer and winter volumes and peak flow rates based on solar array wattage)
               
Select your Grundfos pump.  The left column shows total head in feet and meters. The top row shows module wattage and number of modules. Boxes show seasonal pump performance and maximum flow. 

Daily volume and flow calculations are calculated with Fresno, CA data at a 36 tilt in July, solar insolation of 7.8 kWH/m2. Winter calculations are calculated with Fresno, CA data at a 36 tilt in February, solar insolation of 4.7 kWH/m2.

How can you calculate your solar insolation?  Visit the National Renewable Energy Laboratory's PVWatts Viewer.

Most high volume solar pumping systems will give significantly more output in the summer than in the winter. Also, up to 40% more water can be pumped in the summer if the array is on a tracking mount (these estimates are for non-tracking array mounting). The output can vary with different locations and years, and is not guaranteed.

For high volume solar surface pumps look down this page

  Module watts 230+ 230+ 230+ 230+ 230+ 230+
  Modules in series 2 3 4 5 6 7
Head feet (meters) Solar array watts 460 690 920 1150 1380 1610
6   (2) Pump model 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3
  Summer gallons per day 24,885 31,609 37,627 42,809 46,335 49,272
  Winter gallons per day 19,944 26,177 31,410 35,264 38,204 40,675
  Max gallons per minute 44 55 64 73 78 82
25   (8) Pump model 40 SQF-3 40 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3
 
  Summer gallons per day 13,027 20,089 26,345 31,950 35,680 38,605
  Winter gallons per day 9,539 15,049 19,889 24,146 27,295 30,149
  Max gallons per minute 27 40 52 61 67 70
50   (15) Pump model 11 SQF-2 25 SQF-7 40 SQF-5 40 SQF-5 40 SQF-5 40 SQF-5
 
  Summer gallons per day 5,582 9,725 14,817 19,166 22,462 25,183
  Winter gallons per day 4,287 7,100 10,684 13,909 16,552 18,838
  Max gallons per minute 11 20 32 40 45 49
75   (23) Pump model 11 SQF-2 11 SQF-2 25 SQF-7 25 SQF-7 25 SQF-7 40 SQF-5
 
  Summer gallons per day 4,580 6,300 9,221 11,832 13,742 17,381
  Winter gallons per day 3,410 5,067 6,691 8,624 10,157 12,345
  Max gallons per minute 9 12 20 24 27 37
100   (30) Pump model 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 25 SQF-7 25 SQF-7
 
  Summer gallons per day 3,606 5,617 6,695 7,303 10,833 12,536
  Winter gallons per day 2,639 4,182 5,439 6,021 7,662 9,065
  Max gallons per minute 7 12 12 12 23 26
125   (38) Pump model 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 25 SQF-7
 
  Summer gallons per day 2,897 4,769 6,145 6,915 7,286 10,006
  Winter gallons per day 2,085 3,435 4,807 5,536 5,974 7,055
  Max gallons per minute 6 9 12 12 12 21
150   (46) Pump model 6 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 25 SQF-7
 
  Summer gallons per day 2,454 4,041 5,675 6,565 6,952 7,844
  Winter gallons per day 1,851 2,903 4,198 5,114 5,543 5,397
  Max gallons per minute 5 9 12 12 12 18
175  ( 53) Pump model 6 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2
 
  Summer gallons per day 2,282 3,450 5,024 6,114 6,633 6,926
  Winter gallons per day 1,672 2,442 3,594 4,682 5,233 5,531
  Max gallons per minute 5 8 11 12 12 12
200   (61) Pump model 6 SQF-2 6 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2
 
  Summer gallons per day 2,050 2,885 4,237 5,593 6,199 6,586
  Winter gallons per day 1,480 2,288 3,015 4,036 4,777 5,207
  Max gallons per minute 4 5 9 12 12 12
250   (76) Pump model 6 SQF-2 6 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2 11 SQF-2
 
  Summer gallons per day 1,584 2,585 3,556 4,509 5,440 6,477
  Winter gallons per day 1,097 1,970 2,632 3,315 3,969 4,656
  Max gallons per minute 4 5 7 9 11 13
300   (91) Pump model 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3
 
  Summer gallons per day 1,524 2,516 3,058 3,379 3,556 3,628
  Winter gallons per day 1,091 1,835 2,439 2,752 2,957 3,058
  Max gallons per minute 3 5 6 6 6 6
400   (122) Pump model 3 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3
 
  Summer gallons per day 974 1,859 2,613 3,025 3,216 3,365
  Winter gallons per day 719 1,315 1,942 2,360 2,564 2,737
  Max gallons per minute 2 4 6 6 6 6
500   (152) Pump model 3 SQF-3 3 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3
 
  Summer gallons per day 814 1,287 2,000 2,593 2,857 3,025
  Winter gallons per day 585 987 1,402 1,902 2,212 2,398
  Max gallons per minute 2 3 5 6 6 6
650   (198) Pump model 3 SQF-3 3 SQF-3 3 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3
 
  Summer gallons per day 498 990 1,298 1702 2149 2415
  Winter gallons per day 316 692 1,015 1107 1473 1819
  Max gallons per minute 1 2 3 4 5 5
800   (244) Pump model     6 SQF-3 6 SQF-3 6 SQF-3 6 SQF-3
 
  Summer gallons per day     421 871 1325 1741
  Winter gallons per day     179 470 796 1111
  Max gallons per minute     1 3 4 4

High Volume Surface Solar Water Pumps

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Solar Force Piston Pumps

Solaram Surface Pumps

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