Viessmann Vitovolt 200 Technical Manual page 16

3.2 Fixing systems
Foot weight to DIN 1055 at an inclination angle of 35º
If the PV panels are secured against
slippage, only take into account the static
loads to prevent lifting.
Installation height above ground
Foot weight
Calculating the gap between rows of panels
When installing several rows of panels
in sequence, exact dimensions
(dimension "z") must be kept, in order
to avoid unwanted shading.
Example
Würzburg is located at approx 50º latitude.
Solar angle = 90º 23.5º latitude
(23.5º should be accepted as the
constant)
90º 23.5º 50º = 16.5º
l
z
z = Panel row distance
l = Panel height
16
Note
Structural analyses, e. g. for substructures
installed on site, are carried out on
request by:
Ingenieurbüro für Baustatik
Dipl. Ing. Gerhard Nolte
Auf der Heide 1
35066 Frankenberg
Secured against slippage
m to 8 8 to 20
kg 267 439
Determine solar angle b.
This should be chosen so that the midday
sun on 21.12. falls on the panels without
being obstructed by shading.
In Germany this angle (dependent upon
latitude) is between 12º (Flensburg) and
20º (Freiburg).
l
a = Angle of panel inclination
b = Angle of the sun
Secured against lifting
20 to 100 to 8
613 108
Use the following formula:
sin (180° * (a ) b))
z
+
sin b
l
l = 1500 mm
a = 35º
b = 16.5º
l @ sin (180° * (a ) b))
z +
1500 mm @ sin (180° * 51.5°)
z +
z = 4133 mm
8 to 20 20 to 100
183 261
sin b
sin 16.5°
VITOVOLT