Commercial & Utility Solar

Drone Thermal
Solar Inspections

Radiometric aerial thermography to IEC TS 62446-3. Every module scanned, every anomaly located and classified, in a report your O&M team, insurer or module manufacturer can act on.

Who This Is For

EPC and O&M contractors. Subcontract the survey and keep the client. Handover baselines, end-of-defects checks and annual O&M scans, labelled to your string and tracker numbering when you supply the as-builts, so findings drop straight into work orders.

Asset owners and managers. Independent evidence of module and string condition, separate from what your monitoring platform tells you. Supporting evidence for performance disputes and warranty claims, and for the maintenance file your insurer now asks for at renewal.

Commercial property and facilities teams. Every module on a rooftop fleet scanned for faults with nobody on the roof, no harness plan and no shutdown. Anything fire-relevant is flagged for immediate action.

Installers. A check on your commercial installs before the defects liability period closes, usually 12 or 24 months, so any warranty claim is lodged before the window shuts.

Eco Shine Solar drone pilot flying a thermal inspection at a New Zealand solar farm

What We Find

What a Thermal Survey Finds

Faulty components run hot before they fail, or while they quietly cost you output. From the air with a radiometric camera we see them across the whole array, rather than the handful a handheld check reaches. Each finding gets a location, a temperature difference, an IEC class and a recommended action. Class 1 is no abnormality, Class 2 is a thermal abnormality to fix at the next scheduled visit, Class 3 is safety-relevant and gets flagged for immediate action.

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Hot Cells & Hotspots

Cracked cells, shaded cells, baked-on soiling. Left alone they degrade permanently and in rare cases start fires.

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Bypass Diode Failures

A single shorted bypass diode typically drops a third of a module's output, and the inverter usually won't flag it. Thermal shows the warm substring straight away.

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Open Strings & Dead Modules

On a large system a dead string can sit unnoticed for months. It shows up cold on the first pass.

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PID Patterns

Potential induced degradation shows as a patchwork of warmer cells that gets worse toward the negative end of the string, often before monitoring flags it.

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Junction Box & Connector Heating

Hot junction boxes show through the glass on any array. Hot connectors and cabling, a leading cause of PV fires, show wherever the camera can see them. Class 3 findings get flagged for immediate action.

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Visible-Light Findings

Glass breakage, delamination, vegetation shading and soiling, captured in RGB alongside every thermal frame.

Straight From The Thermal Camera

Captures from our own inspections. Brighter means warmer. Heat where there shouldn’t be any is where we start, and every one gets checked against the RGB frame before it’s classed.

Drone thermal image of a commercial rooftop solar array captured by Eco Shine Solar
Thermal image showing heat signatures across solar panels during a drone inspection

How We Fly

  • Conditions. Plane-of-array irradiance above 600 W/m², wind under 28 km/h, cloud 2 okta or less. We schedule inside that window and log conditions in the report, because a thermal survey flown outside it is not worth having.
  • Kit. Radiometric thermal camera with matched RGB, sensor and platform logged in every report. Commissioning, defects-period and warranty-support surveys are flown at 3 cm per pixel, the cell-level resolution IEC TS 62446-3 calls for. Routine O&M scans can be flown at 5 cm per pixel as a faster module-level screen, with anything flagged re-flown at 3 cm.
  • Coverage. Every module on the site, not a sample. Typically 10 to 20 MW a day at 3 cm inside the irradiance window.
  • Mapping. Findings georeferenced and labelled to your as-built string and tracker numbering, so your crew can walk straight to the module.
  • Compliance. CAA Part 101 pilot certificate, AirShare clearance where required, site induction and JSA before every flight, $5M public liability.
Automated drone mission map covering a solar farm during a thermal inspection

What You Get

  • Summary of findings by class and type, with an estimated power loss per anomaly
  • Georeferenced anomaly map over the RGB orthomosaic
  • A page per finding: thermal image, RGB image, location, ΔT (temperature difference), IEC class, likely cause, recommended action
  • Capture conditions, equipment and method logged to IEC TS 62446-3
  • Remediation list as a spreadsheet for your work order system
  • Raw radiometric imagery on request

Turnaround: 3 working days for rooftops, 10 working days for solar farms.

Drone thermal image of a commercial rooftop solar array captured by Eco Shine Solar

Clean, Inspect and Prove It In One Visit

Drone-only operators hand you a report and leave. We clean, thermally inspect and bird-proof the array in the same mobilisation.

The scan after cleaning is the one that counts. With the soiling gone and the glass dry, anything still running hot is a fault in the module or the wiring, not dirt, and that scan becomes your clean baseline. The scan before records what the dirt was costing you. On a solar farm that means one site induction, one traffic plan and one invoice instead of three of each.

Thermal image showing heat signatures across solar panels during a drone inspection

When To Inspect

  • Commissioning and handover. Most plants arrive with some faults. Baseline them before the EPC leaves site.
  • Before the defects period closes. Book two months out, usually month 10 or 22, while the fixes are still the EPC’s cost.
  • Annually as part of O&M. Sites inspected twice a year showed 7% lower equipment-driven loss than sites inspected once (Raptor Maps Global Solar Report 2026).
  • After hail, storm or fire. Documented evidence for the insurance claim.
  • Before you buy, sell or refinance. An independent thermal and visual condition survey for your due diligence.
  • At insurance renewal. Underwriters now price the maintenance file. Weak files get higher deductibles and sub-limits (Willis, in Insurance Business NZ, September 2026).

How We Work

1 Scope

Send us the site type, size and location. Firm price and a provisional flight date back within one working day, confirmed against the forecast the day before.

2 Fly

Site induction, AirShare clearance if needed, then 100% of modules flown inside the irradiance window. Nobody on your roof, no shutdown.

3 Report

IEC TS 62446-3 report with every finding mapped and classified, an estimated power loss on each, plus a remediation list for your work orders. 3 working days for rooftops, 10 for farms.

Request a Quote

Back to you within one working day with a price and a provisional flight date.

If you have photos of your installation please upload them below. This helps us to determine what work is involved.

Questions We Get Asked

Do you need Part 102 for this?
Not for the work we do. Part 101 covers surveys under 120 m, within line of sight, with the property owner’s consent and nobody overflown who hasn’t agreed to it, and that describes almost every rooftop and solar farm in the country. Our pilot holds the Part 101 pilot certificate that allows operations near aerodromes with the operator’s agreement, and we handle AirShare clearances in controlled airspace.

Can you fly any day?
No. Thermal needs strong sun and low wind or the results are meaningless. We book a weather window and confirm the day before.

Do you fix what you find?
We report and classify. Electrical remediation goes to your O&M electrician or installer, and the report is written so they can walk straight to the module. Cleaning and bird-proofing we do ourselves.

What do you need from us?
As-built drawings or a string map (for rooftops, a roof plan is enough), site induction details, access and a contact on the day. And leave the system running as normal. Thermal only shows faults on an array under load, so don’t isolate it for us, and tell us if an inverter is down.

Where do you work?
Based in the Bay of Plenty, with crews across Auckland, Waikato, Northland, Hawke’s Bay and Taranaki. Solar farm surveys nationwide.

Can you do a house?
This page is for commercial and utility sites. For a home, see our residential solar panel cleaning, which includes a 7-point inspection on every visit.

Ready When The Sun Is

Book a Thermal Survey

Tell us the site type, size and location. We’ll come back within one working day with a firm price and a provisional flight date.