Plain explanation
IEC 61215-1 sets requirements for the design qualification of terrestrial PV modules for long-term operation outdoors, and the IEC says plainly that the test results are not a prediction of module lifetime. IEC 61730-1 covers construction requirements for safe electrical and mechanical operation, to prevent electric shock, fire and injury. So the two certificates show the design passed type tests; real life still depends on the build quality, the environment and how the module is installed. Check which editions are on the certificate and what your national code or grid operator requires.
Steps from the source
- Look for both IEC 61215 and IEC 61730 on the certificate, with edition years
- Check the certificate is issued for that exact model range
- Check what your national code / grid operator requires
"Test results are not construed as a quantitative prediction of module lifetime."
Word for word from the source.
Source
Where installers ask this
General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.