3
Method 2: First, determine the latitude of the install location.
Then subtract the Sun Declination Angle (-23.5°) from the
latitude. This method for finding this angle can be seen in
the following example provided. Reference Figure 4.
Tilt Angle = Latitude Angle – (Declination Angle).
Example: Site: Houston TX, Latitude = 29°8'
Latitude (29.8°) – Declination Angle (-23.5°) = 53.3°
Figure 4
Figure 5
Pipe Tee
Solar Panel Angles for Various Latitudes
Day of the Year
Photovoltaic
Module
Angle
(Deg
.)
Yo
u
r
Latitude
(Deg.)
100
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
12/21
1/20
2/19
3/21
4/20
5/20
6/19
7/19
8/18
9/17
10/17
11/16
12/16
0°
25°
20°
15°
10°
5°
30°
55°
50°
45°
40°
35°
70°
65°
60°
After adjusting the Azimuth and Tilt angle, tighten down the
set screws that secure the 3-outlet pipe tee fitting to the 2.0
in. mounting pole.
Figure 6 – Solar Panel Tilt vs. Well Latitude Location
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