8
extreme operating ambient temperature for PV
modules: -40 °C to 85°C.
Mechanical load on PV modules: under standard
installation conditions, the maximum tested
snow/wind load is 5400 Pa/2400 Pa and the design
load (considering a safety factor of 1.5 times) is
3600 Pa/1600 Pa. Refer to 5.3 for detailed
installation and mechanical loads.
PV modules are strictly forbidden to be installed and
used in environments with excessive amounts of
hail, snow, hurricanes, sand, soot, air pollution, and
etc. PV modules are strictly forbidden to be installed
or used in environments where there are strongly
corrosive substances (e.g. salt, salt spray, brine,
active chemical vapors, acid rain, strong vapor
confined environments or any other substance that
will corrode PV modules and affect their safety or
performance).
If the PV modules will be installed in special
environments such as high temperature and high
humidity
environments,
humid
salt-mist
environments (C3+areas specified in ISO 9223),
marine and floating environments and farms, the
purchaser or user needs to inform Solahart in
advance. The types of PV modules, BOM, and
warranty issues will be decided by mutual
agreement between the parties.
If the above precautions are not observed, Solahart
warranty will be void.
5.2
Tilt angle selection
The tilt angle of a PV module refers to the angle
between the surface of the PV module and the ground
surface, as shown in Fig. 1. The power output of a PV
module is maximized. when it faces the sun directly.
Fig. 1 Schematic diagram of tilt angle
For northern hemisphere, PV modules should preferably
face south. For southern hemisphere, PV modules
should preferably face north. For detailed mounting
inclination, please follow local regulatory guidelines or
the recommendations of an experienced installer.
Solahart recommends an installation tilt angle of no less
than 10°, so that when it rains, the dust on surface is
easily carried away by the rainwater, thus reducing the
number of times of clean; at the same time, it helps the
water on the surface of the PV module to flow away,
avoiding the long-term accumulation of large amounts
of water on the glass surface, which can affect the
appearance and performance of the PV module.
PV modules connected in series should be installed in
the same orientation and angle. Different orientations
and angles may result in different amounts of solar
radiation being received by each module, resulting in
power loss.
5.3
Mounting Guide
PV module mounting system must be composed of
durable,
corrosion-resistant
and
UV-resistant
materials, and it must be inspected and tested by a
third-party
testing
organization
with
static
mechanical analysis capabilities meeting national
and
regional
regulations
or
corresponding
international standards.
