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Grundfos SQFlex E-Z Pump and Solar Panel Selection Chart

Click here to view, print, or download the Grundfos SQFlex E-Z Pump and Solar Panel Selection Chart.pdf

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Choose your water depth, then click on a Pump Model below to see it in more detail.

Water Depth / Solar Panels  Module Watts  250  250  250
 Qty of Modules  2  4  6
 Array Watts  500 100  1500
25 Feet  Pump Model 40 SQF-3 60 SQF-3 60 SQF-3
 Summer 13,000 26,000 35,000
 Winter  9,500  20,000 27,000
 Max Flow in GPM  24  47  62
50 Feet  Pump Model  11 SQF-2 40 SQF-5  40 SQF-5
  Summer  5,500 15,000 22,000
  Winter  4,300 10,000  16,000
  Max Flow in GPM 9.6 27 40
75 Feet  Pump Model  11 SQF-2 25 SQF-7 40 SQF-5
  Summer 4,600 9,200 14,500
  Winter  3,400 6,700 10,000
  Max Flow in GPM  8 17 27
100 Feet     Pump Model  11 SQF-2  11 SQF-2 25 SQF-7
  Summer 3,600  6,700 7,500
  Winter 2,600 5,400 7,500
  Max Flow in GPM 6.4  12  19
 125 Feet    Pump Model  11 SQF-2 11 SQF-2 16 SQF-10
  Summer  2,900 6,100 7,700
  Winter  2,000 4,800 5,600
  Max Flow in GPM  5.3 11  14
 150 Feet    Pump Model 6 SQF-2 11 SQF-2 11 SQF-2
  Summer 2,400 5,700 7,000
  Winter  1,800  4,200 5,500
  Max Flow in GPM  4.5  10 12
175 Feet     Pump Model 6 SQF-2 11 SQF-2  11 SQF-2
  Summer  2,300  5,000 6,600
  Winter  1,700  3,600 5,200
  Max Flow in GPM  4.1  8.8 12
200 Feet     Pump Model  6 SQF-2  11 SQF-2 11 SQF-2
  Summer  2,000 4,200 6,200
  Winter 1,500  3,000 4,800
  Max Flow in GPM 3.8 7.6 12
250 Feet     Pump Model 6 SQF-2 6 SQF-2 11 SQF-2
  Summer  1,600 3,000 5,300
  Winter  1,100  2,500 3,700
  Max Flow in GPM  3 5.5 9.6
 300 Feet    Pump Model  6 SQF-3 6 SQF-3 6 SQF-3
  Summer  1,500 3,000 3,500
  Winter 1,000 2,400 3000
  Max Flow in GPM  2.8 5.7 5.9
    400 Feet  Pump Model  3 SQF-3 6 SQF-3 6 SQF-3
  Summer 975 2,600 3,200
  Winter 700 1,900 2,600
  Max Flow in GPM  1.8 4.8  5.7
500 Feet     Pump Model 3 SQF-3 6 SQF-3 6 SQF-3
  Summer  800 2,000 2,800
  Winter 575 1,400 2,200
  Max Flow in GPM  1.5  3.7 5.5
  650 Feet   Pump Model  3 SQF-3 3 SQF-3  6 SQF-3
  Summer  500 1,300  2,100
  Winter 300 1,000 1,400
  Max Flow in GPM  .9 2.5 4.1
    800 Feet  Pump Model

Not enough power

from the solar panels       

  6 SQF-3
  Summer  1,300
  Winter  800
  Max Flow in GPM 2.5