7
• Dry and cool operation can have a positive effect on
the performance as well as the service life of a
PV module.
• Also for roof-integrated mounting, ensure good rear
ventilation to minimise loss of output which results
from a higher module temperature. Ensure adequate
ridge ventilation, for example, with a roof ridge ventila-
tor.
5.6
Clearance under the PV modules
HINWEIS
• Keep the space behind the laminate free of any
objects. This prevents damage to the insulating
back sheet and the junction box.
• Ensure that sharp or conductive parts (e.g. screws
or nails) do not protrude into the space behind the
PV module.
• If possible, take measures to prevent foreign objects
(e.g. snow, ice, leaves, twigs, branches) from being
able to get behind the PV module.
6
Electrical installation
All relevant electrical values are specified on the back-
side nameplate of the module.
Under normal conditions, a photovoltaic module is
likely to experience conditions that produce more cur-
rent and/or voltage than reported at standard test con-
ditions. Accordingly, the values of
I
sc
and
V
oc
marked
on the module should be multiplied by a factor of 1.25
when determining component voltage ratings, conduc-
tor current ratings, fuse sizes, and size of controls
connected to the PV output.
The modules are qualified for application class A: for
the use in systems operating at greater than 50V DC
or 240W, where general contact access is anticipated
(Modules qualified as application class A in IEC61730
are considered to meet the requirements for Safety
Class II. This module is ra
ted as “Fire safety class C”
according to IEC 61730.
6.1
Connectors
WARNING!
Incompatible or unsuitable connectors can
overheat. Fire hazard!
• Only use connectors that are the same type and
from the same manufacturer.
• Avoid using different types of connectors or ones
from different manufacturers,
even
:
- if connecting is possible
- if the connectors have the same basic designation
(e.g. “MC4”) or
-
if they are designated as “compatible”.
You can find more details in the next two sections.
6.1.1
PV Module connectors
The various module types can be fitted with the follow-
ing connectors:
• Original Multicontact® MC4 (with locking)
You can find the specific connectors in the module
data sheet.
6.1.2
Connector peculiarities
HINWEIS
Original Multicontact® MC4-connectors:
• Only plug original Multicontact
®
MC4 connectors
into original MulticontactR
®
MC4 connectors.
¹
6.1.3
Replacing the connectors
You can remove the connector on a PV module and
replace it with another connector, if necessary. You
retain the manufacturing warranty if you remove and
mount with approved tools in the proper way and ac-
cording to the connector
manufacturer‘s instructions.
1: The original Multicontact
®
MC4 connectors are referred to as “MC4” in the data
sheet
6.2
Laying the string cables
CAUTION!
Brittle fractures in junction boxes due to contact
with unsuitable connection cables: Risk of fire!
• Only use connection cables without plasticisers.
• conductor size: 4mm
2
type: PV1-F
• Ambient temperature:
-40
℃
to 85
℃
Avoid any tensile and pressure loads on the junction
box when mounting.
• When mounting, avoid heavy tensile loads on any
connectors already plugged in.
• Bend the cables from the connector at least 4 cm
after they exit from the connector.
• Bend the cables from the junction box as well, at
least 4 cm after they exit from the connector.
• This keeps the cables waterproof at the cable outlet.
Observe the guidelines on laying the respective ca-
bles. Lay all cables ensuring that:
• You adhere to the minimum bend radius (e.g. 5-fold
cable diameter
2
).
• You avoid laying near sharp corners and edges or
protect the cables accordingly.
• cables must not lay between PV module backside
and mounting system parts.
• Protect them from direct sunlight and precipitation.
• You secure the cables with UV resistant cable clips
3)
or other suitable cable fasteners which protect the
cable insulation.
• Cables from PV module strings are laid as near to
each other as possible to minimise the effects of
being struck by lightning
2 Some countries specify a larger bend radius, e.g. 8-fold wire diameter in the USA (NEC
Codebook 2011).
3 For attaching the cable clip, use a suitable tool which can fully tighten at a defined
low force. Avoid cable clips and tools which constrict or damage the cable insulation when
tightening.
