www.znshinesolar.com
Document No.
：
QES/ZX-RD-III032A
- 10
this class, and adequate ventilation must be ensured between the back of the module and the installation surface.
A safe working area also must be left between the edge of the roof and the external edge of the solar array.
In the case of residential installations on the ground, modules must be installed following local regulations,
e.g. using fence.
5.3
、
TILT ANGLE OF INSTALLATION
The installation of solar PV module string should be in the same orientation and the same installation angle.
Different installation directions and installation angles will lead to the mismatches in current and voltage which is
caused by different light absorption of different PV modules, this mismatch will cause the PV system power output
loss.
The largest power will be generated When direct sunlight on solar PV module. For modules which are
installed on the fixed brackets, the best installation angle should be selected to ensure the maximum power output
can be generated at winter time, if the angle can guarantee enough power output during the winter, it will make
the whole solar PV system in the rest of the year can have enough power output also.
PV modules are recommended to be installed at an optimized tilt angle to maximize the energy output. For
detailed information on the best installation angle, please refer to standard solar photovoltaic installation guides or
consult a reputable solar installer or systems integrator. Dust building up on the surface of the modules can impair
module performance. ZNSHINE SOLAR recommends installing the modules with a tilt angle of at least 10°,
making it easier for dust to be washed off by rain. Any faults caused by and/or attributable to tilt angle less than 10
degrees are not covered by manufacturer's warranty. It is roughly equal to the latitude of the project site as a rule
of thumb, facing toward the equator. Optimized system designs must incorporate other local requirements.
Installation inclination refers to the Angle between the PV module and the ground plane, as shown in Figure
5-1.
Fig. 5-1 Tilt angle
Table 5-2 Recommended tilt angle for fixed systems
Latitude
Tilt angle
0°
～
15°
15°
15°
～
25°
The same latitude
25°
～
30°
Same la5°
30°
～
35°
Same la10°
35°
～
40°
Same la15°
40°+
Same la20°
