Not all thermal inspection reports are created equal, and increasingly, buyers, insurers, and lenders want proof of that. IEC TS 62446-3 exists to set a consistent, auditable standard for PV system thermographic inspection — and understanding what it actually requires matters more than most owners realize.
What the standard actually governs
IEC 62446-3 defines the conditions under which a thermographic inspection is considered valid: minimum irradiance levels, acceptable temperature differentials for classifying an anomaly, and a structured categorization system for defect severity. It is less about the drone or camera used and more about the discipline of the capture and analysis process behind the report.
Why it shows up in due diligence
For owners and IPPs, an IEC-compliant report is increasingly a bankability document as much as an operations one. Insurers reference it when evaluating claims, lenders reference it during refinancing, and buyers reference it during acquisition diligence. A report that cannot demonstrate compliant methodology invites questions at exactly the moments an owner can least afford delay.
Building compliance into the platform, not the paperwork
Rather than relying on a pilot or analyst to manually confirm every threshold, IEC-compliant reporting should be a property of the platform generating the report — time-stamped, audit-ready, and consistent across every site in a portfolio. That is the standard Hornbill holds Hornbill SolarWise™ reporting to by default.
Learn more about Hornbill’s compliance approach →
Leave a Reply