4 April 2012
each cable after confirming the
polarity of them is correct.
Cable conduits should be used in
locations where the wiring is
inaccessible to children or small
animals.
Module Wiring
The maximum number of
VBHNxxxSE series that can be
wired in series is sixteen (16).
The maximum number of
VBHHxxxAE series that can be
wired in series is twenty (20).
Modules shall not be wired in
parallel without maximum over
current protection.
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.
These modules contain factory
installed bypass diodes. If these
modules are connected each other
incorrectly, the bypass diodes,
cable, or junction box may be
damaged.
Array Wiring
The term “array” is used to
describe the assembly of several
modules on a support structure
with associated wiring.
Use copper wire that is sunlight
resistant and is insulated to
withstand the maximum possible
system open circuit voltage.
Check your local codes for
requirements.
Earth Ground Wiring
The kind of the earth construction
shall conform to IEC61730-1.
Bonding shall be by a positive
means, such as clamping, riveting,
bolted or screwed connections, or
welding, soldering or brazing. The
bonding connections shall
penetrate all non-conductive
coatings, such as paint, anodized
coatings or vitreous enamel.
A wiring terminal or bonding
location of module intended to
accommodate a field installed
equipment-grounding conductor
shall be identified with the
appropriate symbol (IEC 60417-
5019(DB: 2002-10)) or shall have a
green-colored part.
Grounding should be carried out by
the attachment to the module or
array frame, to avoid the hazards
of electric shock or fire.
Module Terminations
A junction box as a terminal
enclosure is equipped for electrical
connections on Panasonic modules.
Modules are equipped with MC
TM
plugs or SMK plugs as a terminal
enclosure. Use these MC
TM
plugs
or SMK plugs for electrical
connections.
If two or more separable
connectors are provided, they shall
be configured or arranged so that
the other and vice-versa will not
accept the mating connector for
one, if it will result in an improper
connection.
Please contact your SANYO
Authorized Representative with
questions regarding other electrical
connections if needed.
Junction Box and Terminals
Modules equipped with one
junction box contain terminals for
both positive and negative polarity,
and bypass diodes.
One terminal is dedicated to each
polarity (with the polarity symbols
engraved onto the body of the
junction box) (see Figure 3-1 or 3-2).
Conduit
For applications where wire
conduits are used, follow the
applicable codes for outdoor
installation of wires in conduits.
Minimum diameter of wire conduit
is 4 mm
2
.
Verify that all fittings are properly
installed to protect wires against
damage and prevent moisture
intrusion.
DIODES
Bypass Diodes
When the modules in series strings
are shaded partially, it may cause
reverse voltage across cells or
modules, because the current from
other cells in the same series is
forced to flow through the shaded
area. This may cause undesirable
heating to occur.
The use of a diode to bypass the
shaded area can minimize both
heating and array current
reduction.
All modules are equipped with
factory installed bypass diodes. The
factory installed diodes provide
proper circuit protection for the
systems within the specified system
voltage, so that you do not need
any other additional bypass diodes.
Specifications of bypass diode for
VBHNxxxSE series are as follows;
Number of bypass diode: 3 diodes,
Number of series cells per bypass
diode: 24 cells / diode (See Figure
4-1).
Specifications of bypass diode for
VBHHxxxAE series are as follows;
Number of bypass diode: 3 diodes,
Number of series cells per bypass
diode: 96 cells / diode (1st and 3rd
block, 2 parallels of 48 cells series),
48 cells / diode (2nd block, 2
parallels of 24 cells series) (See
Figure 4-2).
Contact your SANYO Authorized
Representative for proper diode
type, if it is necessary to add or
change diodes due to system
specifications.
MAINTENANCE
Some maintenance is
recommended to maintain optimal
output performance of the solar
modules.
If the module surface becomes
dirty, it may reduce output power.
It is recommended to clean the
surface of the module with water
and a soft cloth or sponge.
To remove persistent dirt, the
module can be washed with a
micro-fiber cloth and ethanol.
Alternatively, a mild detergent may
be used. Never use abrasive
detergent, strong alkaline
detergent and strong acid
detergent to clean any part of the
module.
It is also recommended to inspect
the electrical and mechanical
connections annually.
If you need electrical or mechanical
inspection or maintenance, it is
recommended to have a licensed
authorized professional carry out
the inspection or maintenance to
avoid the hazards of electric shock
or injury.
The return of any modules will not
be accepted by SANYO unless prior
written authorization has been
given by SANYO.
As part of our policy of continuous
improvement SANYO reserves the
right to change product
specifications at any time without
prior notice.
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