4
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.
Connectors between modules must be
inserted until they click.
Do not put too much stress on
connectors in order to avoid detachment
of connectors.
Please contact your Panasonic 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).
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
VBHNxxxSJ25 series are as follows;
Number of bypass diode: 3 diodes,
Number of series cells per bypass diode:
24 cells / diode. Specifications of bypass
diode for VBHNxxxSJ40 series are as
follows; Number of bypass diode: 4
diodes, Number of series cells per bypass
diode: 22 cells / diode (See Figure 4).
Contact your
Panasonic 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
modules.
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 Panasonic unless prior written
authorization has been given by
Panasonic.
As part of our policy of continuous
improvement Panasonic reserves the right
to change product specifications at any
time without prior notice.
Anti-reflection Glass surface cleaning
Cleaning of dirt
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.
Never use abrasive detergent, strong
alkaline detergent and strong acid
detergent to clean any part of the module.
Performance of solar panel may be
reduced. Please be very careful since
warranty will not cover the damage from
detergent.
When cleaning with detergent, it is
recommended to start with smallest area
and from the edge of solar panel in
order to check no damage occurs to the
glass.
It is recommended to read carefully the
manuals of detergent and understand
notes on usage and first-aid treatment.
Cleaning of soiling from handling
Unlike the persistent dirt, soiling of
surface from holding the glass will not
affect performance of solar panel.
Therefore cleaning is not necessary for
this soil on glass surface caused by
handling. In case customer prefers
cleaning, following is the recommendation
of cleaning methods.
Wipe gently with clean cloth and neutral
glass detergent or weak alkaline glass
detergent.
After that, clean surface of glass with wet
and clean cloth.
Acid and strong alkaline detergent and the
detergent which forms protective layer on
the surface of the glass must be avoided.
Those detergents may damage surface of
the glass and affect on the performance
of solar panel. Please be very careful
since warranty will not cover the damage
from detergent.
When cleaning with detergent, it is
recommended to start with smallest area
and from the edge of solar panel in
order to check no damage occurs to the
glass.
It is recommended to read carefully the
manuals of detergent and understand
notes on usage and first-aid treatment.
Disclaimer of Liability
Panasonic does not assume responsibility and
expressly disclaims liability for loss, damage, or
expense arising out of, or in any way
connected with installation, operation, use, or
maintenance by using this manual.
Panasonic assumes no responsibility for any
infringement of patents or other rights of third
parties, which may result from use of modules.
No license is granted by implication or under
any patent or patent rights. The information in
Figure 4: Number of series cells per
bypass diode
24 cells / diode
24 cells / diode
24 cells / diode
22 cells / diode
22 cells / diode
22 cells / diode
22 cells / diode
VBHNxxxSJ25 series
VBHNxxxSJ40 series
