17
WIRING
GENERAL
All wiring should be done in accord-
ance with applicable electrical
codes.
Wiring methods should be in accord-
ance with the NEC in USA.
All wiring should be done by a quali-
fied, licensed professional.
Wiring should be protected to help
ensure personal safety and to pre-
vent its damage.
Connectors between Microinverters
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 connector 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 inac-
cessible to children or small animals.
Please contact your Panasonic Au-
thorized Representative with ques-
tions regarding other electrical con-
nections if needed.
MODULE WIRING
All modules with microinverter con-
nected in parallel by Enphase’s Q
cable should be of the same model
number and/or type.
Figure 15 is sample Wiring Diagram.
Please follow “ENPHASE INSTALLA-
TION AND OPERATION MANUAL”
for construction method about Q
cable connection, AC connector
connection, and other connection
Please follow “ENPHASE Miciroin-
verters Installation Guide” for con-
figuration and operation of a
Miciroinverter.
https://enphase.com/sites/default/files/
downloads/support/IQ7-7plus-7X-Micro-
Manual-EN-US.pdf
Module should not be connected
more than number of “Number of
Maximum AC module” in Table1-1
.
ARRAY WIRING
The term “array” is used to describe
the assembly of several modules on
a support structure with associated
wiring.
When installing a PV array, the sys-
tem design must be completed with
reference to the module and invert-
er electrical specifications for proper
selection of fuses, breakers, charg-
ing 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
equipment.
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 outdoor installation of
wires in conduits. Minimum diame-
ter of wire conduit is 4 mm
2
. The
temperature rating of conductor is –
40
～
90
℃.
In order to avoid submerging cables
and connectors 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 or wind load 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 intru-
sion.
Check your local codes for require-
ments.
