NBN EN 61646 : 2009

1 Scope and object
2 Normative references
3 Sampling
4 Marking
5 Testing
6 Pass criteria
7 Major visual defects
8 Report
9 Modifications
10 Test procedures
    10.1 Visual inspection
    10.2 Performance at STC
    10.3 Insulation test
    10.4 Measurement of temperature coefficients
    10.5 Measurement of nominal operating cell temperature
          (NOCT)
    10.6 Performance at NOCT
    10.7 Performance at low irradiance
    10.8 Outdoor exposure test
    10.9 Hot-spot endurance test
    10.10 UV test
    10.11 Thermal cycling test
    10.12 Humidity-freeze test
    10.13 Damp heat test
    10.14 Robustness of terminations test
    10.15 Twist test
    10.16 Mechanical load test
    10.17 Hail test
    10.18 Light-soaking
    10.19 Annealing
    10.20 Wet leakage current test
Tables
1 Summary of test levels
2 Ice-ball masses and test velocities
3 Impact locations
Figures
1 Qualification test sequence
2 NOCT correction factor
3 Reference plate
4 NOCT measurement by reference-plate method
5 Wind correction factor
6 Hot-spot efect in type A cell
7 Reverse characteristics
8 Hot-spot effect in type B cell
9 Case SP: series-parallel connection
10 Cast SPS: series-parallel-series connection
11 Thermal cycling test
12 Humidity-freeze cycle
13 Hail test equipment
14 Impact locations
Annex A - Bibliography
Annex ZA (normative) Normative references to international
publications with their corresponding European publications

Gives requirements for design qualification and type approval of terrestrial thin-film photovoltaic modules for long-term operation in moderate open-air climates as specified in IEC 721-2-1. Applies mainly to amorphous silicon technology, but may also apply to other thin-film PV modules. May require modifying due to the special characteristics of these other new technologies.