Zone
Solar
radia-
tion
Required head [ft]
No. of 50 Wp
modules
Power [Wp]
20 40 60 90 120 160
180 220
(A)
260 300 340 360 390
Zone K - tilt angle 30°
7.3 kWh/m
2
per day
Required flow [gal/day]
4 200
5810 3380 2770 1740 1060 819 766 687 608 502 423 370 291
25
SQF-3
11 SQF-2
6
SQF-
2
3 SQF-2
13600 6340 5150 4020 2990 2060 1820 1530
(B)
1240 1080 1000 951 872
8
(D)
400
(E)
75
SQF-3
25
SQF-
3
11 SQF-2 6 SQF-2 (C) 3 SQF-2
20400 9670 6970 5230 4490 3490 3060 2190 1960 1720 1510 1370 1190
12 600
75
SQF-3
25 SQF-6 11 SQF-2 6 SQF-2
25900 14100 9700 5890 5150 4440 4070 3280 2460 2090 1900 1850 1690
16 800
75 SQF-3
25
SQF-6
3 SQF-2 6 SQF-2
30400 18400 12100 7980 5550 4940 4620 3910 3280 2480 2170 2090 1930
20 1000
75 SQF-3
25
SQF-6
11 SQF-2 6 SQF-2