UL-61646:2012 pdf free download – STANDARD FOR SAFETY Thin-Film Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval.
a) after the final light soaking, the maximum output power at STC is not less than 90 % of the minimum value specified by the manufacturer in Clause 4;
NOTE The pass/fail criteria must consider the laboratory uncertainty of the measurement. As an example, if the laboratory extended uncertainty, 2 sigma of the STC measurement, is ±5 %, then a maximum power measurement greater than 85,5 % of the minimum specified value would be the pass criteria.
b) no sample has exhibited any open-circuit during the tests;
c) there is no visual evidence of a major defect, as defined in Clause 7;
d) the insulation test requirements are met after the tests;
e) the wet leakage current test requirements are met at the beginning and the end of each sequence and after the damp heat test;
f) specific requirements of the individual tests are met.
If two or more modules do not meet these test criteria, the design shall be deemed not to have met the qualification requirements. Should one module fail any test, another two modules meeting the requirements of Clause 3 shall be subjected to the whole of the relevant test sequence from the beginning. If one or both of these modules also fail, the design shall be deemed not to have met the qualification requirements. If, however, both modules pass the test sequence, the design shall be judged to have met the qualification requirements.
7 Major visual defects
For the purposes of design qualification and type approval, the following are considered to be major visual defects:
a) broken, cracked, or torn external surfaces, including superstrates, substrates, frames and junction boxes;
b) bent or misaligned external surfaces, including superstrates, substrates, frames and junction boxes to the extent that the installation and/or operation of the module would be impaired;
c) voids in, or visible corrosion of any of the thin film layers of the active circuitry of the module, extending over more than 10 % of any cell;
d) bubbles or delaminations forming a continuous path between any part of the electrical circuit and the edge of the module;
e) loss of mechanical integrity, to the extent that the installation and/or operation of the module would be impaired;
f) Module markings (label) is no longer attached or the information is unreadable.
8 Report
Following type approval, a certified report of the qualification tests, with measured performance characteristics and details of any failures and re-tests, shall be prepared by the test agency in accordance with ISOIIEC 17025. Each certificate or test report shall include at least the following information.
a) A title.
b) Name and address of the test laboratory and location where the tests were carried out.
c) Unique identification of the certification or report and of each page.
d) Name and address of client, where appropriate.
e) Description and identification of the item tested.
f) Characterization and condition of the test item.
g) Date of receipt of test item and date(s) of test, where appropriate.
h) Identification of test method used.
i) Reference to sampling procedure, where relevant.
j) Any deviations from, additions to or exclusions from the test method, and any other information relevant to a specific tests, such as environmental conditions.