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3. ELECTRICAL INSTALLATION
Parallel Connection
• The solar modules may be combined in parallel to produce the desired current output.
• When modules are combined in parallel, the total current is equal to the sum of currents from each module.
• The voltage of each module connected in parallel should be same.
• When connecting plural strings of modules in parallel every series string or solar module must be fused prior to
combining with other strings. By pass diodes are factory installed in the solar modules.
• Please refer to the applicable regional and local codes for additional fusing requirements and limitations on the
maximum number of solar modules in parallel.
• Maximum series fuse rating is refer to "Product Speciications; page 11" .
• A multiplying factor is required for increased output of the PV modules. Under normal conditions, a PV module is
likely to experience conditions that produce more current and/or voltage than reported at standard test conditions.
Accordingly, the values of Isc and Voc marked on this PV module should be multiplied by a factor of 125 % when
determining component voltage ratings, conductor ampacities, fuse sizes, and size of controls to the PV output.
• Depending on national directives additional safety factors might be applicable for overcurrent protection.
..............
General Wiring
• L G Electronics recommends that all wiring be double insulated with a minimum rating of 90 °C (194 °F).
• A ll wiring should use a lexible copper (Cu) conductor.
• The minimum size should be determined by the applicable codes.
• W e recommend a size not smaller than 4 mm².
Earth Grounding
• T he solar modules from LG Electronics meet the conditions
of safety class II. Therefore grounding is not mandatory.
However grounding is recommended. Also equipotential bonding
must be realized. The national directives must be respected.
• S peciic information on the solar module dimensions and location
of grounding holes is provided in 'Product Speciications' .
• O ne M4 stainless steel bolt, one nut, one spring washer, two lat
washers, one cup washer, one star washer and 12 AWG Cu
wires are recommended per solar module.
• There is an earth hole in the center of the module frame.
Using this hole, an earth conductor and the solar module
frame may be recommended to connected and earthed as the
below drawing.
• T o prevent electric shock and ire, a protective ground must be
done on the frames of solar modules and arrays although the
solar modules from LG meet the conditions of safety class II.
The national directives must be respected.
Parallel connection for more current
Module frame
Bolt
Flat washer
Star washer
Cup washer
Grounding wire
Flat washer
Spring washer
Nut
8
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