13
WIRING
GENERAL
•
All wiring should be done in accordance with
applicable electrical codes.
•
All wiring should be done by a qualified, li-
censed professional.
•
Wiring should be protected to help ensure
personal safety and to prevent its damage.
•
Please connect each cable after confirming the
polarity of it is correct.
•
Connectors between modules must be inserted
until they click.
•
When connecting the connectors, please make
sure that foreign mat
-
ter such as water, sand
and so on do not get inside the connector. Also,
please keep in mind that if you leave the con-
nector in a non
-
connected state for a long
period of time, contamination of foreign mat
-
ter is likely to occur.
•
If an extreme load is applied to the cable, the
cables may come off the junction box body or
the connect
-
ors. Please connect so that a
strong load is not applied to the cable.
•
When fixing the cable to the stand, make sure
the minimum bending radius of the cable is 30
mm or more.
•
Do not disconnect
terminals while modules
generate electricity and connect electrical load
to avoid the hazard of electrical shock.
•
Cable conduits should be used in locations
where the wiring is inaccessible to children or
small animals.
•
These modules contain factory installed bypass
diodes. If these modules are connected each
other incorrectly, the bypass diodes, cables, or
junction box may be damaged.
•
Please contact your Panasonic Authorized
Representative with questions regarding other
electrical connections if needed.
MODULE WIRING
•
All modules connected in series should be of
the same model number and/or type.
•
The number of VBHNxxxSJ25 modules can be
wired in series is recommended to be seven-
teen (17) or fewer. If connecting eighteen (18)
modules and more in series, check local tem-
perature conditions to ensure compliance with
maximum system voltage limitations.
•
The number of VBHNxxxSJ40 modules and
VBHNxxxSJ46 modules can be wired in series is
recommended to be thirteen (13) or fewer. If
connecting fourteen (14) modules and more in
series, check local temperature conditions to
ensure compliance with maximum system
voltage limitations.
•
The number of VBHNxxxSJ47 modules can be
wired in series is recommended to be twelve
(12) or fewer. If connecting thirteen (13) mod-
ules and more in series, check local tempera-
ture conditions to ensure compliance with
maximum system voltage limitations.
•
Do not connect module in parallel without
using connection devices that connect to ap-
propriate FUSE for each series string or each
module. For the installation of connection
devices, refer to the installation manual of
connection devices.
•
Do not connect modules in parallel without
maximum over current protection.
ARRAY WIRING
•
The term
“
array
”
is used to describe the assem-
bly of several modules on a support structure
with associated wiring.
•
When installing a PV array, the system design
must be completed with reference to the
module electrical specifications for proper
selection of inverters, fuses, breakers, charging
controllers, batteries and other storage devices.
In particular, as the temperature characteristic
of the PV module, the voltage value rises on the
low temperature side. Consider the lowest
temperature in the area where the system is
installed and select the equipment so that it
does not exceed the rated voltage of the equip-
ment.
•
Modules are equipped with SMK connectors
(P51
-
5H/R51
-
5) as a terminal enclosure. Use
these SMK connectors for electrical connec-
tions.
•
Use copper wire which is insulated to withstand
the maximum possible system open circuit
voltage. For applications where wire conduits
are used, follow the applicable codes for out-
door installation of wires in conduits. Minimum
diameter of wire conduit is 4 mm
2
. The temper-
ature rating of conductor is –
40
～
90
℃.
•
In order to avoid submerging cables and con-
nectors in the water, cables must be fixed
either to the module frame using cable fixing
holes or to the mounting structure. Also, if the
cable is not secured, a force may be applied to
the cable from the out
-
side, and the module
may be dam
-
aged.
•
Do not insert
PV cable between back side and
mounting structure rail. When snow weight is
applied to the module, load may be applied to
the cable.
•
Verify that all fittings are properly installed to
protect cables against damage and prevent
moisture intrusion.
EARTH GROUND WIRING
•
Completely ground all modules.
•
When grounding the module, please use a hole
near the ground mark displayed on the frame.
For metal parts for grounding, consider combi-
nation that does not cause corrosion due to
dissimilar metal contact.
•
We recommend installing a light
-
ning rod and
SPD (Surge protection device) to reduce dam-
age or break
-
down to the PV module caused by
lightning.
•
Check your local codes for requirements.
