06
Danger
•
Avoid all electrical hazards when installing, wiring,
operating and maintaining all panels.
•
Do not connect panels that have different electrical
properties or physical configurations in the same
system.
•
Match the polarities of cables and terminals when
making the connections; failure to do so may result in
damage to the panel.
•
The rating of the over-current device shall not exceed
the maximum series fuse rating marked on the name
plate.
•
The panel contains factory installed bypass diodes
located inside the junction box.
•
When installing the system, it is recommended to
install a lightning rod to protect the system.
•
The induced overvoltage by lightning can cause the
system damage, you should design conductor loop
connection as minimum as possible.
•
The junction box should not be opened. Opening the
junction box will void the warranty.
•
Panels with a suspected electrical problem should be
returned to LG Electronics for inspection and possible
repair or replacement as per the warranty conditions
provided by LG Electronics.
Electrical Connections
•
Shock hazard may occur near the solar modules
electrical connections.
•
Modules may be connected in series and/or parallel
to achieve the desired electrical output as long as it
is within the guidelines on the product specification
sheet.
•
Please use only the same type of modules in a
combined source circuit.
•
Do not disconnect the module under when it is
operating. Shock hazard may occur near the solar
modules connection means.
•
When the module installing in series or in parallel (e.g.
using for extension cables), the connector of each
module should be the same products.
ELECTrICaL INSTaLLaTION
Diodes
•
All LG modules are equipped with factory installed
bypass diodes. The factory-installed diodes provide
proper circuit protection for the systems within the
specified system voltage.
Diode specification and configuration
-
+
1
D1
D2
D3
2
3
4
I
F
(AV)
25A
V
F
(max)
0.6V
V
RRM
50V
T
j
(max)
200°C
R
TH
2.0°C/W
Series Connection
•
The solar modules may be wired in series to produce
the desired voltage output.
•
The current of each module connected in series
should be the same.
•
The maximum PV system voltage for that circuit shall
be calculated as the sum of the rated open-circuit
voltage of the series-connected PV modules corrected
for the lowest expected ambient temperature. For the
LG Mono crystalline modules, the rated open-circuit
voltage shall be multiplied by the correction factor
provided in NEC Table 690.7. The maximum current
of Photovoltaic Source Circuit Currents shall be the
rated short-circuit current of the series-connected
module multiplied by 125 percent in accordance with
NEC article 690.8.
