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not be compatible with each others, which easily leads to mismatch risk.
7.3.2
Ensure that connector caps are tightened before connecting the modules, keep connectors dry and clean.
Do not attempt to make an electrical connection when the connectors are wet, soiled, or otherwise faulty
conditions. Avoid sunlight exposure and water immersion of the connectors.
7.4 Bypass diodes
The junction boxes of Bluesun Solar’s modules contain bypass diodes wired in parallel with the PV cell strings.
In case of partial cell shading or damaged, the parallel diodes will bypass the current generated by the
non-shaded cells, thereby limiting modules heating and performance losses. Take care, the bypass diodes are
not over-current protection devices.
7.5 Grounding
7.5.1
The double glass frameless module has no exposed conductors, so grounding is not required in
accordance with the National Electrical Code (NEC).The mounting bracket is a conductor, so it needs to be
grounded, make sure that the entire system is installed to meet local electrical codes and regulations.
7.5.2
Modules use anodized aluminum alloy frame as a rigid support, in order to avoid modules by lightning
and electrostatic damage, as well as the protection of personal safety, all module frames and mounting racks
must be grounded. If there is no special provision, please follow the International Electrotechnical Commission
standards or other international standards. Use the recommended connection terminals to connect the
grounding cable to the module frame. Use 12 AWG copper wire for the grounding wire. As shown in Figure
20 on the module ground hole and its label, Figure 21 shows the module grounding method.
Aluminum frame
Grounding hole
Grounding label
Figure 20 Grounding hole and ground label
Figure 21 Grounding method
7.5.3
The frames have pre-drilled grounding holes and brand with signs, these holes should be only used for
grounding purposes, but not for mounting the modules. And do not drill any additional grounding holes on the
frames of the module, which may void the warranty.
7.5.4
For optimum power output, it is recommended to ground the DC negative pole of the module array.
7.5.5
The grounding cables must be fully contact with inside of the aluminum alloy, and the connection
terminal must penetrate the oxidation coating of frame during grounding. Connecting the module frames and
supporting beams using suitable grounding conductors can achieve good grounding. If the supporting system is
M4 Nut
Grounding cable
Aluminum frame
Tooth washer
Flat washer
Cup washer
M4 Screw
