GCL Installation Guide
Grounding by cable
In a system with two or more Modules connected in series, if part of a Module is shaded
while the other part is exposed to the sun, a very high reverse current will go through the
cells which have been partly or entirely covered and it will cause overheat on the cells,
which may damage the Module. Using bypass diodes can protect Modules from this kind
of risk. There are bypass diodes in junction boxes, which can reduce the eects of partial
shadows. Do not privately disassemble the junction box to replace the diodes, even when
the diodes are broken. This should be processed by the professionals.
In a system with batteries, if the controller doesn’t have the function of backswing
protection, block diodes installed between the battery and the Module can prevent the
reverse current from damaging the Module.
Bypass Diodes and Block Diodes
GCL System Integration Technology Co.,Ltd
Bringing Green Power to Life
13
The grounding bolts must be made of stainless steel and be used in the specied
grounding holes. First, make the M3.5 stainless steel bolt pass through the spring washer,
at washer, cup washer (copper conductor with a diameter of 2.1 mm) and star washer,
and then insert through the grounding hole, at washer and spring washer on the frame.
Finally, tighten with a M3.5 nut. Caution: The upper limited temperature of the conductor
is 85℃. As for the installation, refer to Figure 9.
Figure 9
Frame
Nut (M3.5,SS)
Spring washer
Flat washer
Star washer
Flat washer
Spring washer
Bolt (M3.5,SS)
Copper wire
Cup washer