Definition
Cell microcracks are sub-visible fractures in PV silicon cells caused by transport, installation, or thermal stress. Initially invisible but worsen over thermal cycling, leading to power loss, mismatch, and hot spots.
Key Takeaways
- Cell microcracks = sub-visible silicon fractures.
- Caused by mechanical and thermal stress.
- Detected via EL imaging during commissioning.
- Progress to hot spots if undetected.
- Half-cell modules more resistant than full-cell.
Frequently Asked Questions
2 commonly searched questions about Cell Microcrack.
What causes microcracks?
Mechanical stress during transport, installation, snow load, wind cycling, thermal cycling. Half-cell modules less prone than full-cell.
How are they detected?
Electroluminescence (EL) imaging — dark spots on EL photo. IR thermography may show hot spots from advanced microcracks.
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