DAH Solar DHM72 5BB Series Installationshandbuch - Seite 6
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P V
M O D U L E
I N S T A L L A T I O N
M A N U A L
2.2 Installation Condition
2.2.1 Climatic Condition
1) Recommended installation ambient temperature is between -40°C to 85°C (-4°F to 185°F).
2) Do not install PV modules in a flooded risk area.
Note: The PV module mechanical load (including the wind and snow pressure) is based on the installation method and installation
site. During the collection of mechanical load, it must be calculated by a professional installer according to the requirements of
system design.
2.2.2 Installation Site Selection
In general, the PV modules should be installed in the place with the maximum sunlight thoughout the year.In the northern
hemisphere, modules should be placed toward south as the first choice, while in the southern hemisphere, it should be
placed toward north. If the angle of the modules deviate 30 angle away from the South (or North) direction, the power
output will lose about 10% to 15%, if modules angle deviate is 60 degrees, lose rate is about 20% to 30% of power output.
The installation site should avoid shadows of tree, building and other obstacles. Module manufacturer have already
installed the bypass diode to minimize the loss, but the shadow will still reduced output power.
When the PV system equipped with batteries bank, it must be installed correctly, which can protect the system operation
and ensure the safety of user during their using. Please follow the recommendations of the battery manufacturer
regarding installation instructions, operation and maintenance. To ensure that the battery is working properly, which
should avoid direct sunlight, rain and snow erosion, meanwhile maintaining good ventilation. Most kinds of battery
charging could release hydrogen which explosion easily happen. It must avoid a fire or make a spark around the batteries
bank. If the battery installed outdoors, which must the placed in a specially designed area with insulation and ventilation.
Do not install the PV modules close the naked light or flammable materials.
Do not install the PV modules in places where it would be immersed in water or continually exposed to water from a
sprinkler or fountain etc.
2.2.3 Angle Selection
The angle of the PV modules refers to the angle between module surface and the ground (Figure 1), the output power
will be maximum when modules are facing the sun in vertical.
Sunlight
Tilt angle
Horizontal line
Figure 1 : The installation angle of PV Module
If connect to the independent PV system, modules angle should be based on season and sunshine condition to obtain
the maximum power output. Normally, if module's power output could be satisfied during the lowest sunshine intensity
of a year, then this installation angle can meet the demands of the whole year. For grid tie PV system, the installation
angle selection of the modules should be based on annual power output maximization.
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Module PV