-7-
﹡
Note:
The mechanical load bearing (include wind and snow loads) of the module is based
on the mounting methods. The professional system installer must be responsible for
mechanical load calculation according to the system design.
2.2.2 Site selection
In most applications, Econess solar PV modules should be installed in a location where they
will receive maximum sunlight throughout the year. In the Northern Hemisphere, the module
should typically face south, and in the Southern Hemisphere, the modules should typically
face north. Modules facing 30 degrees away from true South (or North) will lose
approximately 10 to 15 percent of their power output. If the module faces 60 degrees away
from true South (or North), the power loss will be 20 to 30 percent.
When choosing a site, avoid trees, buildings or obstructions, which could cast shadows on
the solar photovoltaic modules especially during the winter months when the arc of the sun
is lowest over the horizon. Shading causes loss of output, even though the factory fitted
bypass diodes of the PV module will minimize any such loss.
Do not install the PV module near naked flame or flammable materials. The spacing
between the PV modules and the installation flat should be at least 15cm.
When solar modules are used to charge batteries, the battery must be installed in a manner,
which will protect the performance of the system and the safety of its users. Follow the
battery manufacturer’s guidelines concerning installation, operation and maintenance
recommendations. In general, the battery (or battery bank) should be away from the main
flow of people and animal traffic. Select a battery site that is protected from sunlight, rain,
snow, debris, and is well ventilated. Most batteries generate hydrogen gas when charging,
which can be explosive. Do not light matches or create sparks near the battery bank. When
a battery is installed outdoors, it should be placed in an insulated and ventilated battery case
specifically designed for the purpose.
Do not install the PV module in a location where it would be immersed in water or continually
exposed to water from a sprinkler or fountain etc.
2.2.3 Tilt angle selection
The tilt angle of the PV module is measured between the surface of the PV module and a
horizontal ground surface (Figure 1). The PV module generates maximum output power
when it faces the sun directly.
Figure1: PV module title angle
