What microcracks look like
A microcrack is a hairline fracture in the silicon wafer of a solar cell — invisible from above the panel glass. They form during shipping, installation, hail strikes, or thermal cycling over years. A single microcrack reduces that cell's output by 5–15%; cascade failures from one cracked cell can reduce a panel's output by 30%+.
Thermal imaging during operation shows microcracks because the damaged cell's resistance is higher — it runs 2–10°C hotter than its neighbors.
When this audit matters
- System is 5+ years old and production has slowly declined beyond normal annual degradation
- Recent hail storm or major wind event (panels can take impacts that don't break glass but crack cells)
- Original installer warranty is expiring and you want to file claims for any damaged panels before it lapses
- Pre-listing for a home sale — proactive documentation
- Cleaning hasn't fully restored production — confirms whether the issue is dirt or damage
What the audit includes
- Thermal scan of every panel from both sides where accessible
- Annotated thermal images of each panel with hot-spot detection
- Written report identifying any cells with measurable thermal anomalies
- Recommendation: monitor, warranty-claim, or replace
- Coordination with original installer if warranty claim is recommended
Many solar warranties degrade slowly — the time to claim is now, not later. Manufacturer warranties typically have a 10-year workmanship clause and 25-year power output clause. Finding microcracks during the workmanship window means a free panel replacement. Waiting and finding the same cracks at year 12 means a partial-credit claim against power-output warranty.