LG are testing their solar panels to extremes

Quote: “If a single defect is found among a hundred units, then the remaining 99 units will be considered defective by our customers. Selling large quantities for the sake of sales is not the best solution. Every product we assemble must be of excellent quality. Building customer trust by providing superior product is our kLG Testing Facilityey aim.” – In-Hwoi Koo, founder of LG in 1948.

LG is the only company we are aware of that has had their testing laboratory independently certified by both the two key testing organisations, being UL in the USA (Underwriters Laboratories) and TUV Rheinland in Germany. LG is therefore qualified to test and certify other manufacturer’s solar panels on behalf of both UL and TUV. Before LG Solar presents a panel to the market, the panels have to survive one of the most extensive test regimes currntly used in the solarindustry right now. Below is the list of the tests LG solar panels are subjected to before they are sold to you.

Wind loading: panels must endure wind speeds of up to 216 km/hr

Hail impact: panels must withstand hail of 28mm to 140 km/hr

Impact and robustness: panels must survive a 45 kg impact from a minimum height of 1.5 m

Static mechanical: panels must withstand loads of up to 800 kg of snow/weight per panel; and durability to vibration and frame stress with weight on the panels


Thermal cycling: IEC* standard test is 200 cycles at 85°C to -40°C (LG panels tested up to 90°C for 800 cycles)

Note: Cheaper panels often only test for IEC standard, being 200 cycles; International ElectroTechnical Commission (IEC) are they key worldwide solar panels quality standards testing authority

Humidity test: IEC standard is 1000 hours tested at 85°C with 85% humidity, (LG panels tested to 4000 hrs with 85% humidity)

Potential Induced Degradation (PID): LG panels have passed the independent PID tests of both Frauenhoffer
Institute in Germany as well as TUV Rheinland, Germany. Internal LG testing subjected panels to 4x the Draft

IEC standard, being 60°C, 85% humidity and 1000V electricity over 96 hours. LG solar ran the test for 384
hours, and passed. A high quality competitor panel which underwent the same test in the LG laboratory, failed
the test

Hot spot: Two electroluminescence tests are carried out during production plus best practice cell matching
and a special module design feature with precision build quality of very low tolerances in soldering precision
all combine to minimize hot spot risks

Salt water spray/corrosion

Backing sheet stress

UV resistance test of backing sheets and other components;

Wafer resistance

Wafer impurities

UV resistance of backing sheets and other internal parts

Outdoor exposure – including one test running in Australia right now

Electrical safety

Humidity/freezing

Ammonia resistance

Packaging vibration
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LG panels are manufactured under an ISO 9001 (Quality Management System) regime, and tests are undertaken to ensure LG panels are designed and built for a real world 25 year life span. Not many solar panels can make such a claim.

LG Solar decided to test their panels, and some other high quality European panels, in one of the harshest testing regimes to replicate extreme and prolonged weather conditions. The same panels are sent through a combination: Damp Heat Test (2000 hours); Thermal Cycle Test (400 cycles); Humidity/Freeze test (40 cycles) Result, after such accelerated degradation:

LG panels still generated 95% output, and thus passed the IEC benchmark

European panels generated 87.3% output, and thus did not achieve the IEC banchmark

LG Solar are confident that this rigorous testing regime has created one of the best class of quality solar products available in the marketplace. Not many solar panels can make such a claim. LG’s founder In-Hwoi Koo would be proud.