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ELECTRICAL CONNECTION AND POTENTIAL EQUALIZATION
Solarwatt solar modules are equipped at the factory with high-quality solar cables and
reverse-polarity protected, shock proof plug connectors. 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 or where the existing strings of the module are not long enough may
be removed and replaced (More information in the download area at solarwatt.com). The
allowed cross-section and outer-diameter of the cable and instruction of the manufactu-
rer have to comply. Suitable cable sets, plugs, cables and installation accessories can be
found in the shop on our website solarwatt.com.
When connecting the modules, ensure that the plugs engage with an audible click. The
common bending radii of at least 5 times the outer cable diameter must be complied
with. It is recommended to lay the cable firmly so that they are not subjected to mechani-
cal loads. The cable and connector must not exposed to moisture and will not rest on the
ground or floor.
WARNING
Solar modules generate electrical energy on the front side during incidence of
light. A system with multiple solar modules can generate life-threatening vol-
tages and electrical currents. Do not touch the electrical connections or cable
ends while the solar module is exposed to light.
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 permitted up to the maximum system voltage as listed
in applicable data sheet. The maximum number 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 protection 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 protection class can be used in systems with unrestricted access, the relevant
regulations must be complied with. Solarwatt solar modules qualified within this protection
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 circuit voltage UOC should be multiplied by a factor 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 conductors, the size of fuses
Errors and changes excepted. | © 2025 Solarwatt GmbH
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