Electrical Installation
•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.
Diodes
•All LG modules are equipped with factory installed bypass diodes. The
IF (AV) | 2X7.5A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
| 1 | 2 | 3 | 4 | ||||||||||||||||
|
|
| D1 |
|
| D2 |
|
| D3 |
|
| |||||||||
VF (max) | 0.84V |
|
|
|
|
|
|
| ||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VRRM | 45V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tj (max) | 175 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RTH | 1.7 /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 number of series connected modules can be determined by basis on max system voltage, the 125% safety factor not explained in specifications, and the module Voc which can be checked in Product Specifications in this document.
Do not exceed 80% of maximum system voltage.
•Maximum Module configuration (recommend) : refer to the ‘Product Specification’ in this manual.
Series connection for more voltage
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 the same.
•When connecting plural strings of modules in parallel every series string or solar module must be fused prior to combining with other strings.
•Abide with all applicable federal, state, and local codes for additional fusing requirements and limitations on the maximum number of solar modules in parallel.
•Maximum parallel strings without proper measures, e. g. fuse 15 A : 1 string
•Parallel configuration is not limited if proper measures are taken to block the reverse current flow, e.g. fuses for the protection of the module and cables from
•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. The requirements of the National Electrical Code (NEC) in Article 690 shall be followed to address these increased outputs. In installations not under the requirements of the NEC, the values of Isc and Voc marked on this PV module should be multiplied by a 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.
Parallel connection for more current
4
