Wiring Tips for Connections and Connectors
Cable management
Protect cables from any damage through friction or
stress. Using a cable raceway or conduit is a good
method of providing this protection.
To ensure longevity, connectors must be protected from
humidity as much as possible:
• Shield connectors by placing them directly beneath the
panel so water cannot fall on the connection
• Ensure cables and connectors do not hang loose or
that they are moved around by wind
• When securing cables, ensure they are held firm, but do
not overtighten, as this may deform the insulation.
Best practice is to secure the cable ~ mm either side
of the connectors. Fastening the connector itself may
damage the protection afforded by the connector shell.
Ensure sufficient air circulation around connectors
Keeping humidity away from electronic connections
is also important. Solar panel connectors must not be
le to stand in permanent or regularly occurring pools
of water. Likewise, aer rainfall, connectors should be
given the opportunity to dry completely. Although the
connectors used by REC are rated to IP, moisture can
build up between the mounting structure and connector.
Fig. shows a connector secured tight to the mounting
structure. While the panel above protects the connection
from rain; humid air, mist or condensation can cause
moisture to accumulate between the connector and the
mounting rail. This layer of moisture is caught between
the connector and rail and can slowly work into the
connector through capillary action. Here it can erode the
metallic connection.
Note: These Guidelines to Best Practice are intended to help ensure a safe
connection between solar panels and between other balance of system
components. REC accepts no responsibility for any damage caused by
improper or incorrect use of connectors. The Warranty on the product is only
valid if the instructions in the REC Peak Energy Series Installation Manual are
observed at all times.
Fig. : Fastening of the connector tight to the mounting structure can cause
moisture build up between connector and rail, damaging the connection
Fig. : Best practice installation of a connector allows air circulation around the
connector body with connector secured either side
Ensuring sufficient air circulation around the connector,
as in Fig. , means it can dry effectively and avoids the
risk of damage.
Use of extra isolation and lubricants
If connectors ever require replacement, and the use of
lubricants is desired, follow the instructions supplied by
the connector manufacturer.
As the panels are rated to IP, there is no requirement
to add extra protection to the connection, for example
heat shrink, grease or tape.
Application of chemicals
REC does not permit the use of chemicals on the
connectors or contacts. Use of such can lead to
degradation of the plastic or rubber casing. Treating
connectors in this way will invalidate the warranty.
Summary
With cables and connectors forming a source of
weakness in the system, it is imperative that these
are protected as far as possible. To avoid any drops in
performance or at worst any risk to life, following the
best practice guidelines above will ensure a safe and
durable bond between panels and other components.
NE-11-05-05 Rev.B - 06.2015
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high performing products, services and investments for the solar industry. Together with our partners, we create
value by providing solutions that beer meet the world’s growing energy needs. REC is headquartered in Norway and
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