PVMD Delft University of Technology Learning objectives 1. PV - - PowerPoint PPT Presentation

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Aug 14, 2023 548 likes •635 views

Reliability Testing 3 Olindo Isabella PVMD Delft University of Technology Learning objectives 1. PV module design 2. Electrical properties 3. Temperature effects 4. Mounting issues 5. Reliability and I-V tests 1. Reliability tests

SLIDE 1

PVMD

Delft University of Technology

Reliability Testing 3

Olindo Isabella

SLIDE 2

Learning objectives

1. PV module design 2. Electrical properties 3. Temperature effects 4. Mounting issues 5. Reliability and I-V tests

1. Reliability tests

Mechanical load and hail test
Potential induced degradation test
UV test
Electrical insulation (hi-pot) and wet leakage current

2. Solar simulator standard

SLIDE 3

Mechanical load and hail test

Mechanical load test

Simulate stress from snow, wind and hail
2400 Pa

Hail test

25 mm
80 km/h

Robustness of termination

SLIDE 4

Potential induced degradation (PID)

Large voltage potential
Movement of ions
Corrosion and power loss

PID can be mitigated by:

Material choice
Galvanic separation

SLIDE 5

UV test

Exposure to ultra-violet
Degrade adhesion
Discolouring of

encapsulant material

SLIDE 6

Electrical insulation (hi-pot) and wet leakage current

Electrical safety tests
Electrical shock hazard
Insulating resistance > 40 MΩ for every square meter

SLIDE 7

Years 0 5 10 15 20 25 Field failures from measurements Age of 85% of actual global installed PV capacity 5 Duration of lab tests

Recap

Reproduced from: “IEC 61215: What it is and isn’t", John Wohlgemuth, NREL, 2012.