Solar panel testing and certification

Solar panel testing and certification

Facts about solar panel manufacturing and testing

Proven technology, perfected over 50 years of production

Clean, automated factories ensure ideal conditions for precision manufacturing

Electro-luminescent testing lasers detect micro-hairline imperfections to eliminate defects

UL Listing test certification by independent labs

99.99% reliable; less than 1/10th of 1% defects

25-year or greater performance warranty, often backed by 3rd party warranty insurance

40+ year lifespan

Strong enough to park a vehicle on


Today's high-quality solar panels are made and tested in automated factories by some of the largest manufacturers in the world

All solar panels offered by SunWatts are UL listed. They are independently tested to Underwriter Labs listing standards for fire safety, performance, and reliability. The major independent testing bodies include CSA Group, TUV Rhineland, DNV GL, and other recognized testing authority’s. Manufacturers hire one of these independent companies to perform the tests and certify the products meet all the standards. The third-party sends the results to UL for verification and listing.

UL fire safety, performance and reliability tests

Energy Yield

Baking, extreme heat

Freezing, extreme cold

Water resistance

Hail impact, 1” hail @ 50 mph from 3’ distance

Compression strength

Salt mist corrosion for coastal climate

Blowing sand for dry, desert climate

Ammonia corrosion resistance in farm or livestock environments

California Listed Panels

Most building permit departments and utility companies across the nation refer to the PTC Ratings for eligible equipment listed by the California Energy Commission (CEC). Submitted information is confirmed by the CEC prior to being added to the list of eligible equipment. To be added to the eligible equipment list, PV modules must meet the following criteria:

Have safety certification (ANSI/UL 1703) from a Nationally Recognized Testing Laboratory

Submit electrical characterization data tested by a third-party laboratory

The electrical characterization data is from testing on a single, manufacturer selected sample

Components must have a minimum 10-year warranty to protect against defects and undue degradation of electrical generation output.

How to Get Started

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