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Installation guide
Example A: Clamping plate
Example B: Clamping wing
Example C: Direct bolting
28
Proper wiring
Never open the connection box! The modules are
already fitted with all necessary wires and connec-
tors.
Ensure correct wiring:
The integrated connection cables are UV re-
sistant. The conductor cross-section of the
connection cables is 4 mm². For wiring, the
connection cables are fitted with prefabricated
connectors, which are protected against re-
verse polarity.
Keep the total area of all conductor loops as low
as possible in order to reduce the voltages due to
indirect lightning strikes. Always carry out a care-
ful final check of the wiring prior to commissioning
the generator. If the measured open circuit voltage
diverges from the default value, a wiring error has
occurred. Check for correct polarity.
Merge the connectors together correctly:
Connectors may only merged together when dry.
Also make sure that a gap-free connection is pos-
sible.
In order not to exceed the max. system voltage
at -10 °C, the 50 cell Excellent and Ultra modules
must not be connected in series with more than 25
modules. The 54 cell Excellent module allows for
series connection of up to 24 modules. With the
Professional modules, max. 22 modules may be
connected in series. Additionally, the requirements
of the inverters must be observed.
When connecting the modules in parallel, a cor-
responding overcurrent protection must be used.
This can be achieved with direct current fuses,
which prohibit return currents greater than 12 A.
Furthermore, the connection requirements and de-
sign regulations of the inverter manufacturer must
be observed.
Only use suitable materials:
The system may only be wired using special solar
wires and suitable connectors. It is very important
that all necessary materials are in a flawless elec-
trical and mechanical condition. Only use single
core wires and chose an appropriate conductor
size in order to minimize the voltage drop. For fur-
ther connections of the modules only appropriate
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