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together to create a voltage higher than the permitted system voltage. The maximum number of
modules in series depends on system design, the type of inverter used and environmental conditions.
c) The maximum fuse rating value in an array string can be found on the product label or in the product
datasheet. The fuse rating value is also corresponding to the maximum reverse current that a module
can withstand, i.e. when one string is in shade then the other parallel strings of modules will be loaded
by the shaded string and the current will pass through to create a current circuit. Based on the
maximum series fuse rating of module and local electrical codes and standards, make sure the
modules strings in parallel are protected with the appropriate in-line string fusing.
d) Open the combiner box of the control system and connect the conductor from the PV arrays to the
combiner box in accordance with the design and local codes and standards. The cross-sectional area
and cable connector capacity must satisfy the maximum short-circuit of the PV system (for a single
component, we recommended that the cross-sectional area of cables be 4mm
of connectors be more than 10A), otherwise cables and connectors will become overheating for large
current. Please pay attention to the temperature limit of cables is 85℃.
e) All module frames and mounting racks must be properly grounded in accordance with local and
national electrical codes. Attach the equipment grounding conductor to the module frame using the
hole and hardware provided. Note that a stainless steel star washer is used between the ground wire
and module frame (see Figure 10 below).This washer is used to avoid corrosion due to dissimilar
metals. Tighten the screw securely.
f) Follow the requirements of applicable local and national electrical codes.
g) These modules contain factory installed by pass diode .If these modules are incorrectly connected to
each other, the bypass diodes, cable or junction box may be damaged.
h) The cable of the junction box is defined as L, as showed below in Figure 11. For Jinko standard full
module L is 900/1200mm, the half–cut module L is 145/290mm, and the SWAN bifacial module L is
150/250mm. For customized module, L can be based on your condition. Please take the cable length
into consideration before designing the wiring layout.
Figure 10：Ground installation of PV modules
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and the rated current
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