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5 Circuitry guidelines
You may only interconnect identical solar modules of the
same type and the same power class. Ensure that the
maximum permissible system voltage is not exceeded
when you connect the modules in series. In doing so, take
into account the effect of variations in temperature on the
voltage in solar modules, particularly since module voltage
increases at low temperatures.
When connecting modules in parallel, make sure that each
line connected in parallel contains the same number of
modules and that suitable measures are in place to protect
against power surges (e.g. line fuse). Make certain that the
indicated load capacity regarding the reverse current I
stated in the datasheet, is not exceeded.
A PV module may supply a higher current and/or a higher
voltage under normal conditions than under standar-
dized test conditions. As a result the Isc and Uoc values
on the module should be multiplied by a safety factor of
1.25 to determine the rated voltages of components, the
rated current in cables, the sizes of fuses and sizing of
controls which are connected to the output of the PV
modules. Ensure that you comply with local applicable
standards and regulations.
6 Electrical connection
The solar modules are designed for use in grid-connect-
ed solar generators. If they are used for any other pur-
poses, differing technical features should be taken into
account. Solar modules may only be installed by quali-
fied specialists. In the process, they must comply with
the relevant industrial standards and regulations for PV
systems, such as the German Association for Electrical,
Electronic & Information Technologies regulations, DIN
standards, German Association of Energy and Water
Industries guidelines, the network operator's technical
connection conditions and employers' liability insurance
associations' accident prevention rules. We draw your
attention again to the following points in particular:
Bosch Solar Module c-Si M 60 EU I Bosch Solar Module c-Si M 60 S EU I Bosch Solar Module c-Si P 60 EU I Bosch Solar Module c-Si M 48 EU I Bosch Solar Module c-Si M 48 S EU
Module manufacturer code 14, 17, 23
Circuitry guidelines | Electrical connection | 9
Important note!
Only install non-damaged modules with clean, dry
cabling, plug connectors and junction boxes.
The solar modules, particularly the plug connectors
and tools, must remain dry during installation.
Disconnection devices must be fitted between the
module and inverter. The disconnect component
must be readily accessible in order to disconnect the
direct current side if danger should arise.
Make sure that all electrical connections are properly
, as
secured.
R
Only use cabling which is suitable for outdoor instal-
lation to interconnect module strings (UV and ozone-
resistant, temperature resistance at least between
- 40° C and 110° C).
Cables must feature a minimum cross-section of
4 mm² and isolation must be approved for the maxi-
mum system open-circuit voltage.
Protect cabling against damage by such means as
suitable fastening with cable clips.
Important note!
Connecting cables which are able to
move can lead to chafed points, thus
causing insulation damage to the con-
necting cable.
The cables must be laid in such a way that the cables
are not squashed or put under pressure in any other
way.
You must not open the junction box with pre-assem-
bled, connected cables.
The junction box, cabling and connection plug must
not be cleaned or dampened with substances con-
taining grease or alcohol.
Solar plugs pre-fitted in the factory must not be
removed.
Ensure that the module connection cable is relieved
of strain when installed.
Bosch Solar Energy AG
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