DMEGC Solar PV Modules Installation Manual
•
When modules have been installed but the system has not
been connected to the grid yet, each module string should
be kept under open-circuit conditions and proper actions
should be taken to avoid dust and moisture penetration
inside the connectors.
•
In case where a cable connection method not included in
the below is used, please confirm the suitable cable
length with DMEGC
Solar’s sales representative
.
•
For different DMEGC Solar
’s
module types, DMEGC Solar
offers optional cable lengths to match various system
configurations.
•
Recommended system cable schemes are shown below:
1. Portrait two rows installation
Note: Adjacent two modules (up and down) need to be
rotated 180 degrees
2. Portrait one row installation
3. Landscape installation
Note: Adjacent two modules (left to right) need to be
rotated 180 degrees
4. Leapfrog
The maximum distance between two adjacent module
frames should be within 50 mm (1.96in) for the side with
mounting clamps, and 25 mm (0.98in) for the side without
mounting clamps, in order to meet the system cable
scheme.
Correct Connection Connectors
•
Make sure that all connections are safe and properly
mated. The PV connector should not be subject to stress
from the exterior. Connectors should only be used to
connect the circuit. They should never be used to turn the
circuit on and off.
•
Connectors are not waterproof when unmated. When
installing modules, connector should be connected to
each other as soon as possible or appropriate measures
(like using connector endcaps) should be taken to avoid
moisture and dust penetrating into the connector.
•
Do not connect different connectors (manufacturer and
type) together.
•
Do not clean or precondition the connectors using
lubricants or any unauthorized chemical substances
Use of Suitable Materials
•
Only use dedicated solar cable and suitable connectors
(wiring should be sheathed in a sunlight-resistant conduit
or, if exposed, should itself be sunlight- resistant) that
meet local fire, building and electrical regulations. Please
ensure that all wiring is in perfect electrical and
mechanical condition.
•
Installers may only use cables listed and labeled as or PV
wire, and the cable with a cross section area of at least 4
mm² (12 AWG), 90°C wet rated in other areas (i.e. IEC
62930 approved), with proper insulation which is able to
withstand the maximum possible system open-circuit
voltage.
•
Only copper conductor material should be used. Select a
suitable conductor gauge to minimize voltage drop and
ensure that the conductor ampacity complies with local
regulations.
Cable and Connector Protection
•
Secure the cables to the mounting system using UV-
resistant cable ties. Protect exposed cables from damage
by taking appropriate precautions (e.g. placing them
inside a metallic raceway like EMT conduit). Avoid
exposure to direct sunlight.
•
A minimum bending radius of 60 mm (2.36 in) is required
when securing the junction box cables to the racking
system.
•
Protect exposed connectors from weathering damage by
taking appropriate precautions. Avoid exposure to direct
sunlight.
