Install Manual
9
Document Number: MAN-SFO-15 | SAFETY AND INSTALLATION MANUAL FOR PHOTOVOLTAIC MODULES
requirements. As a worst case, use a safety fac-
tor of 1.25 for voltage and cable ampacities and a
safety factor of 1.56 for fuse sizing.
For SIL-XXX ML/NL/BL/XL/HL and SIL-XXX NT/MT,
SIL-XXX NX and SIL-XXX BK the maximum system
voltage rating is 1000V for TUV/IEC and 1000V for
UL. For SIL-XXX NU, SIL-XXX HU, and SIL-XXX OP, the
maximum system voltage rating is 1500V.
The maximum series fuse rating is 20A.
The bypass diodes are not over-current protec-
tion devices. In the event of known or suspected
diode failure, installers or maintenance providers
should contact Silfab. Never attempt to open the
junction box!
To obtain the desired system voltage, modules
are wired in series connection. The recommend-
ed maximum series conguration must NOT ex-
ceed the certied maximum system voltage stat-
ed in the module spec sheets calculated in the
worst case Voc conditions to be determined by
the engineer of record (EOR).
*Refer to the appropriate local geographic elec-
trical codes and regulations for the correct Voc
correction factor according to the respective tem-
peratures. If this information is not available, a 1.25
multiplying factor can be used as default value for
correction of Voc.
For connection of the modules use only appropriate
cables with a minimum conduct cross-section of 4
mm
2
that is compliant to the relevant jurisdiction code.
Verify the junction box lid is rmly closed before
installing the module.
Do not repair or reconnect junction box cable. It
may occur spark or electric shock.
Do not bend junction box cable. Under stress, it can
damage the module. Cable bending radius should
be at least more than 4 times the cable diameter.
Before connection of the system to the grid, the
PV system must be approved for correct installa-
tion, by all appropriate authorities.
Lightning protection is recommended for PV sys-
tems that are to be installed in locations with high
probability of lightning strikes.
9. HANDLING OF MODULES
The Silfab modules are robust, but cells may be
subject to damage if the modules are improperly
handled or installed.
Wear protective gloves when handling and in-
stalling the modules to protect against cuts and
burns.
Handle the module in a way that avoids breakage
or scratching of the glass or backsheet and me-
chanical damage to any other part of the module.
Do not carry the module by its cables. Electric
shock or damage to the module may result.
Do not drop sharp or heavy objects on either sur-
faces of the module.
Do not subject the modules to any impact, and do
not ex them mechanically.
In the event of any damage to either the front or
the back of the module, dangerous electrical haz-
ards may exist, especially if the module is connect-
ed in series to a string. Replace the module imme-
diately and take extreme caution when handling.
Do not step or stand on the PV Module.
9.1 Electrical Connection
Do not connect or disconnect modules under
load! Danger! Risk of serious injury or death from
electric shock or electric arc ash!
Only connect modules with the same rated cur-
rent in series and modules with the same rated
voltage in parallel.
High hazardous voltage (several hundreds of
volts) may occur during installation. Consequent-
ly, installation and maintenance of the modules,
as well as the connection to the main power sup-
ply, may only be performed by authorized and
qualied persons.
Under normal conditions, a PV module is likely to
experience conditions that produce more current
and/or voltage than reported at standard test
conditions. Accordingly, the values of Isc and Voc
marked on the module should be multiplied by
an appropriate safety factor to be determined by
the design engineer based on local electrical code