7 / 17
Installation Manual for DualSun PV Modules
Do not install modules in places with possible inflammable gases.
Modules can not be used in environments with too much hails, snows, flue gas, air pollution and
soot or in places with strong corrosive substances such as salt, salt mist, saline, active chemical
steam, acid rain, or other substances corroding modules, affecting module safety or performance.
Please take protective measures to ensure reliable and safe installation of modules in severe
environments such as heavy snow, cold and strong wind or islands close to water and salt mist or
deserts.
4.2
Selection of tilt angles
Tilt angle of modules: Included angle between module surface and horizontal surface; the
module will obtain the maximum power output in direct facing of sunlight.
Modules are preferred to be south-facing in the north hemisphere and north-facing in the south
hemisphere.
A specific installation angle shall be determined according to installation guide for standard
modules or suggestions from PV module installer.
DualSun suggests that module installation tilt angle be no less than 10° so module surface dust
can be washed away easily by rainfall and times of cleaning can be reduced. And it is easy for
ponding to flow away and avoid water print on the glass due to long time of water ponding which
may further affect module appearance and performance.
5
Mechanical installation
5.1
Regular requirements
Make sure that module installation mode and bracket system are solid enough to bear the
expected load, which is requisite assurance that the bracket installer must provide. Installation
bracket system shall be tested and inspected by the third party testing institution with static
mechanical analysis capacity in accordance with local national or international standards.
Module bracket shall be made from durable, corrosion resistant, ultraviolet proof materials.
Modules shall be fixed on the bracket solidly.
Use higher brackets in places with heavy snow accumulation so the lowest point of modules will
not be covered by snow for a long time. In addition, make the lowest point high enough so as to
avoid sheltering of vegetation and woods or damage of flying sands and stones.
If modules are installed on brackets parallel to the roof or wall, the minimum gap between the
module frame and the roof/wall shall be 10cm for air ventilation so as to prevent module line damage.
Do not make holes on glass or frame of modules.
Make sure the building is suitable for installation before installing modules on roof. Moreover,
seal permeable parts properly to prevent leakage.
The module frame has thermal expansion and cold contraction so the frame interval between
two adjoining modules shall be less than 10mm.
