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3-6 Installing the AC Junction Box and PV Rack
Before Installing the AC junction box and PV rack, be aware of the following requirements:
•
Determine appropriate solar panel angle maximizing the amount of sunlight. It depends on geographical
conditions.
•
To make better air circulation along the backside of the AC module, it is recommended to install the PV
rack with a gap of at least 4 inches (100mm) between the back of the module and roof surface. It might
affect UL listing and fire class if it is less than 4 inches (100mm).
•
Install AC junction box near the AC module.
•
Install using the parts approved in the installation region.
Construct the overall frame of the solar system in the following order:
•
Install the PV rack according to the number of modules per array and the dimensions of the AC module.
(refer to Chapter 9. Product Specification)
•
Inspect the installation site and design possible combination of arrays that fits into the installation site. If
there are any vents or obstacles that make array build difficult, go to 3-9 Building an array of AC modules
to get ideas to design an array.
•
Install the AC junction box near the PV rack. Select the size and type of AC junction box suitable for
connection type according to the output voltage. (refer to 3-12 Connecting Array of AC Modules-to-
Distribution Panel)
•
Make sure that the AC junction box is under protection of weather proof function.
•
Please use appropriate conduit or ducts for wires.
PV racks
AC Junction Box
All of procedures should be carried out by qualified installers. LG Electronics does not provide
warranty for PV racks and the AC junction box.
PV module specification (conditions of 1000W/m
Operating Ambient Temperature
Maximum operation temperature: 65°C (149°F).
Minimum operation temperature: -40°C (-40°F).
Design strength
Refer to Appendix 2 – Module Installation & Load Guide
Notes
- LG AC module should not be operated in locations where direct contact to salt water or ammonia exists.
Rev. 1.0
AC Module System Installation Manual
2
irradiance and 25°C (77°F) solar cell temperature)
15
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