Electrical connection and grounding
SOLARWATT solar modules are equipped at the
factory with high-quality solar cables and rever-
se-polarity protected, shock proof plug connec-
tors. The connection of the string line has to be
done with identical connectors manufacture
and type as to the module connecting cable. To
be able to ensure this the module connector at
the beginning and the end of the string may be
removed and replaced (More information in the
download area at www.solarwatt.com). The al-
lowed cross-section and outer-diameter of the
cable and instruction of the manufacturer have
to comply. Suitable cable sets, plugs, cables
and installation accessories can be found in the
shop on our website www.solarwatt.com.
When connecting the modules, ensure that the
plugs engage with an audible click. The com-
mon bending radii of at least 5 times the outer
cable diameter must be complied with. It is re-
commended to lay the cable firmly so that they
are not subjected to mechanical loads. The cab-
le and connector must not exposed to moisture
and will not rest on the ground or floor.
Solar modules generate electrical energy on the front side during incidence of light. A
system with multiple solar modules can generate life-threatening voltages and electri-
cal currents. Do not touch the electrical connections or cable ends while the solar mo-
dule is exposed to light.
WARNING
To ensure safety and compliance with the
technical data of the products, only original
tools of the manufacturer may be used in the
self-assembly of solar cables.
Connection of modules in series is only permit-
ted up to the maximum system voltage as listed
in applicable data sheet. The maximum num-
ber of solar modules installed parallel without
string fuse is two. Please comply with the value
specified in the data sheet for reverse current
feed and only use standardized photovoltaic
cables (recommendation: at least 4 mm² cable
cross-section).
The modules must not be allowed to operate on
a short circuit permanently.
The solar modules correspond to application
class II and can therefore be operated in sys-
tems with dangerous DC voltages (larger than
120 VDC in accordance with IEC 61730). Solar
modules in this application class can be used in
systems with unrestricted access, the relevant
regulations must be complied with. SOLARWATT
solar modules qualified within this application
class in accordance with IEC 61730 fulfill the
requirements of protection rating II with correct
electrical installation.
Under normal installation conditions, a solar
module can deliver a higher current and/or
higher voltage than under standardized test
conditions. Consequently, the specified values
on the solar module for short circuit current ISC
should be multiplied by 1.25 and the open cir-
cuit voltage UOC should be multiplied by a fac-
tor of up to 1.25, based on the lowest expected
ambient temperature for the given installation
location, to determine the rated voltage values
of components, the rated current values of con-
ductors, the size of fuses and for dimensioning
control units connected to the solar modules.
Any type of soiling on the plug contacts befo-
re or after installation (dust, moisture, aerosols
containing salt, etc.) has a negative influence on
the system function over the intended service
period. For this reason it is necessary to pay
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