Electrical Installation; Danger; Electrical Connections; Diodes - LG LGXXXQ1CK-A5 Installation Manual

ELECTrICaL INSTaLLaTION

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.
06

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.
I (AV) 25A
F
V (max) 0.6V
F
V 50V
RRM
200°C
T (max)
j
R 2.0°C/W
TH
Diode specification and configuration

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.
1 2 3 4
D1 D2 D3
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