Solar PV Inspections
Aerial thermal inspection for commercial, community, and utility-scale solar arrays. Every underperforming module on your array is money leaving the meter. Most of those losses are invisible from the ground. IEC 62446-3-aligned radiometric drone thermography identifies thermal anomalies consistent with cell failures, bypass diode issues, and string faults, with GPS-tagged data your O&M team can act on the same week.
The Thermal Intelligence Framework
Predictive Maintenance, Risk Management, and Compliance
Triage
Most module-level faults are invisible from the ground and invisible in inverter data until degradation cascades into string-level production loss. A per-module aerial thermal inspection identifies thermal anomalies consistent with bypass diode failure, potential-induced degradation, and cell-level hot spots at the individual module level, before those anomalies compound into string failures or void warranty coverage. Your O&M technician gets a GPS-tagged punch list directing them to specific modules rather than a fleet-wide search.
Verify
Post-installation commissioning inspections document array condition at handover, establishing a thermal baseline before the warranty clock starts and flagging any installation-related anomalies before the EPC's liability window closes. Pre-acquisition clients use the same inspection to document the actual health of a solar portfolio before a transaction closes. ITC Level 1 certification and IEC 62446-3 alignment give the deliverable standing with asset owners, warranty carriers, and lenders.
Audit
Annual or biennial radiometric inspections establish a year-over-year performance dataset. Trending anomaly counts and severity classifications across multiple inspection cycles lets asset owners track degradation rate, forecast replacement timelines with documented evidence, and build the maintenance history that supports favorable insurance renewals on solar portfolios. The same baseline data calibrates production-monitoring alerts and supports capital planning for large distributed arrays.
Comply
IEC 62446-3 is the international standard governing thermographic inspection of PV systems. It specifies irradiance conditions, measurement methodology, anomaly classification criteria, and reporting requirements for commissioning and periodic inspections. Where asset owners, financiers, or warranty carriers require standards-aligned commissioning documentation, our deliverable is structured to meet that requirement. For arrays where no governing contract clause specifies a standard, IEC 62446-3 alignment demonstrates the same rigor and gives the data defensibility in warranty and insurance proceedings.
- Radiometric thermal + RGB capture in a single flight
- Anomaly punch-list delivered in five business days or less
- ITC Level 1 sUAS Thermography certified • FAA Part 107 licensed
Why Aerial Thermography Became the Industry Standard
Ground-based inspection of a solar array is slow, dangerous, and incomplete. A technician with a handheld IR camera walking a 5-acre site can realistically inspect a fraction of the modules before environmental conditions shift. A drone flying a pre-planned grid covers the same site in under an hour, capturing every panel under identical irradiance, at a consistent altitude, with temperature data you can compare year over year.
UCLA research shows drone inspections scan large photovoltaic sites roughly 4,000 times faster than ground crews. For a 100 MW site, that difference is measured in weeks of lost production. Early fault detection through thermography has been shown to reduce operations and maintenance costs by up to 30% when integrated into a preventive program.
What We Detect
Radiometric thermal imaging reveals thermal anomalies that may indicate underlying electrical and physical failures:
Radiometric vs. Non-Radiometric Imaging — Why It Matters
A non-radiometric thermal image can tell you something is hot. A radiometric image can tell you exactly how hot, pixel by pixel, with temperature values embedded in every frame. IEC 62446-3 requires radiometric capture for defensible anomaly classification. For warranty claims, insurance documentation, and year-over-year trending, only radiometric data is admissible. Flightlutions captures radiometric data as standard on every solar inspection. Never an upsell.
Our Inspection Process
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01Pre-flight review. We confirm irradiance targets, verify the array is operating near full production, and file the LAANC authorization if your site is in controlled airspace.
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02IEC 62446-3-aligned grid capture. The drone flies an automated pattern at a ground sample distance that resolves individual cells. Modern payloads capture RGB and radiometric thermal frames in the same pass, eliminating double flights.
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03Anomaly classification. Every anomaly is tagged with GPS coordinates, IEC 62446-3 severity category, and paired thermal/visual imagery so your field crew can navigate straight to the finding instead of hunting row by row.
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04Deliverables. You receive an interactive PDF report, a GPS-tagged anomaly punch-list (CSV), a thermal orthomosaic, and raw radiometric files on request.
What You Receive
Per IEC 62446-3, anomalies are classified by severity and reported with GPS location data and per-anomaly imagery pairs. Physical verification (I-V curve trace, hands-on probing) is performed by your O&M contractor and is required to confirm fault type and remediation path. Our deliverables are designed to hand off cleanly to that next step.
- IEC 62446-3 compliant anomaly classification
- GPS-tagged punch-list (CSV) for direct import into field crew workflows
- Thermal orthomosaic with RGB overlay
- Per-anomaly thermal + visual image pairs
- Executive summary PDF suitable for O&M review meetings
- Raw radiometric files on request for warranty claims and analytics platform ingestion
- Data formats compatible with Raptor Maps, Scanifly, and other major PV analytics platforms on request
Use Cases
- Solar O&M and predictive maintenance. Scheduled thermographic inspections identify thermal anomalies before degraded modules compound into string failures or warranty voids. Repeat flights establish year-over-year trending against the same baseline.
- Pre-acquisition array assessment. A thermal scan during due diligence can surface anomalies consistent with significant unreported degradation before the transaction closes. Rush scheduling available for deal deadlines.
- Post-installation commissioning baseline. Pre-PTO inspections document array condition at handover, establishing a thermal baseline and flagging any installation-related anomalies before the warranty clock starts.
- Post-storm and hail damage assessment. Impact damage produces micro-cracks that generate thermal anomalies under load but are invisible to visual inspection. Aerial thermography documents the full extent of damage across the array for insurance claims, covering the full surface faster and more completely than any ground crew.
- Insurance underwriting support. Carriers and risk managers evaluating solar asset portfolios increasingly require documented thermal inspection data. Our IEC 62446-3-aligned reports provide the standardized baseline underwriters expect.
- Underperformance investigation. When production data flags an underperforming string or sector but the cause isn't obvious, aerial thermography identifies the anomaly location and category, giving your O&M team a specific target instead of a fleet-wide mystery.
When to Schedule
Thermal inspections require specific environmental conditions to produce defensible data. We fly when irradiance exceeds 600 W/m² (typically clear-sky conditions between 11 AM and 2 PM), wind is under 5 m/s, and the array is operating at or near full production. For the Hudson Valley, the strongest inspection windows fall between April and October, with shoulder-season mornings often producing the sharpest thermal contrast.
For post-storm inspections, we can typically mobilize within one to two business days, or earlier if conditions allow. Let us know your urgency on the intake call.
Credentials & Certifications
- ITC Level 1 sUAS Thermography certification (FLIR Infrared Training Center)
- FAA Part 107 Remote Pilot Certificate
- $1M commercial drone liability insurance — COI with additional insured naming available before every flight
Frequently Asked Questions
Flight time is typically 30–90 minutes per megawatt for ground-mount arrays and under 60 minutes for most commercial rooftop installations. Report turnaround is five business days or less.
Yes. Raw radiometric files are available on request and are included by default for warranty-claim inspections.
Yes, provided the array is producing at inspection levels and the weather cooperates. Winter inspections are particularly useful for identifying snow-shedding patterns and strings that failed to reawaken after seasonal shutdown.
Flightlutions carries $1M commercial drone liability insurance. Certificates of Insurance naming your organization as an additional insured are provided before every flight.
Yes. We deliver data in formats compatible with Raptor Maps, Scanifly, and other major PV analytics platforms on request. For O&M contractors standardized on a specific platform, we can match file formats, naming conventions, and metadata schemas to your pipeline.
Yes. Pre-PTO commissioning inspections establish a thermal baseline before the system goes live, documenting any anomalies present at handover so EPC contractors and owners have a clear record of array condition from day one.
Yes. Post-storm inspections are a crucial response, as hail damage and impact stress can create micro-cracks that lead to thermal anomalies under load, which are not visible during a visual inspection. We can usually schedule post-storm documentation within one to two business days.
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- Serving Westchester, Hudson Valley, Fairfield County CT, New Haven County CT, and Northern NJ