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Thermal-camera drone inspecting rooftop solar panels

C-DRONE GUIDE · 31 AUGUST 2026

Solar Parking Canopies in France: the APER Law, the 2026 Deadline and Where Drones Fit In

The deadline passed almost unnoticed outside the real-estate and energy departments of major retailers, logistics operators and a handful of local authorities : since 1 July 2026, every outdoor car park over 10,000 m² in France must carry solar canopies, or face a renewable annual administrative fine. Two months after that cut-off, many operators of retail sites, logistics warehouses and park-and-ride facilities are only now grasping the scale of the file to build — and how many mid-sized car parks still have until 2028 to prepare, rather than waiting for the last quarter. Here is exactly what the French APER law requires, how a drone survey de-risks the file before construction, what changes with post-installation thermography once the canopies are up, and 2026 prices.

Published on 31 August 2026, reviewed on 31 August 2026 — regulations in force as of August 2026.

What the APER law requires of car parks, and since when

The text passed almost unnoticed when it was adopted, but its deadline has just hit a swathe of France's commercial and industrial real estate hard. Article 40 of law no. 2023-175 of 10 March 2023 on accelerating renewable energy production — the "APER law" —, codified in article L.171-4 of the building and housing code and detailed by decree no. 2024-1023 of 13 November 2024, requires outdoor car parks over 1,500 m² that already existed on 1 July 2023 to be fitted with canopies incorporating a renewable-energy generation process — in the vast majority of cases, photovoltaic panels — over at least half of their surface.

The deadlines are staggered : car parks over 10,000 m² had to comply by 1 July 2026 — a date already past as we write —, while those between 1,500 and 10,000 m² have until 1 July 2028. A postponement to 2030 remains possible, but only against a financial commitment made before a cut-off date (30 June 2026 for large car parks, mid-2027 for the others) — a window already closed for the largest sites. Past the deadline, the penalty is an administrative fine of €20,000 a year for a car park under 10,000 m², €40,000 for a larger one, renewable every year until compliance is reached — and therefore potentially cumulative across several financial years.

The text provides two release valves many operators discover late : an order of 4 December 2024 sets out the economically unacceptable conditions that can justify an exemption or an adjustment (shade cast by trees worth preserving, grid-connection constraints, a nearby listed monument), and the obligation can be partly met through planting rather than photovoltaics, provided at least 35 % of the surface to be covered stays in energy-generating canopies. Covered or underground car parks are not affected. For an operator of a large retail site, a logistics warehouse, a business park, or a local authority running a park-and-ride facility, the first step is therefore not choosing an installer, but precisely documenting the existing situation — which is exactly where a drone survey earns its place, before the first shovel goes in the ground.

Before construction: the drone survey that de-risks the file

A parking canopy project runs into constraints that the cadastral plan alone never reveals : the exact position of existing lighting masts and lamp posts, the clearance height needed for lorries in delivery areas, trees whose shade reduces expected output or that the operator wants to preserve to justify a partial exemption, the ground's real slope, buried networks visible at the surface, and the exact usable area once parking bays, circulation aisles and existing charging points are accounted for. An aerial drone survey, delivered as a georeferenced 3D model of the whole car park, gives the design office the topographic base it needs to size the canopy layout without multiplying site visits — the same logic detailed in our guide to drone-based sunlight and shading studies on a 3D model, applied here to a car park surface rather than a roof.

The survey also helps document the regulatory file : prior planning notice or full planning permission is generally required beyond certain canopy-surface thresholds, and attaching a precise 3D model of the existing site — neighbouring buildings, tree heights, real hour-by-hour solar masks — speeds up the review and limits requests for extra documents. For large sites where part of the roof is already fitted with photovoltaics, cross-checking against the solar register already produced for the buildings makes it possible to reason about the site's total expected output, roof and car park combined, rather than project by project. And where the operation is part of a property acquisition or disposal, the same survey feeds into a technical due diligence that prices the real expected output before signature, rather than relying solely on the declared surface area.

After installation: why a parking canopy is not inspected like a ground-mounted solar farm

Once the canopies are up, the obligation does not end on the day of commissioning : a hot spot on a cell, a faulty connector or an underperforming string of modules reduce expected output — and for a site that invested under regulatory pressure, that output is what partly funds the installation. Airborne infrared thermography, following the method set out in standard IEC 62446-3, remains the reference tool for spotting these anomalies without dismantling a single module — we detail the full method, directly transposable here, in our guide to drone thermography of a photovoltaic plant.

The difference lies in geometry and flight environment. A parking canopy sits low — often 2.5 to 4 metres above the vehicles —, interspersed with lighting masts, CCTV cameras and, increasingly, electric-vehicle chargers wired directly into the structure ; the site generally stays in use during the flight, with vehicles and pedestrians moving about, which calls for a more constrained flight plan than over open farmland, usually scheduled outside peak hours. A study by R. del Prado Santamaría and co-authors, published in 2025 in EPJ Photovoltaics, specifically tested the effect of drone flight altitude and irradiance level on defect detection by thermography : the most critical hot spots — a short-circuited bypass diode, heavy soiling — remained detectable even at reduced irradiance and higher flight altitude, which supports the case for flying these inspections at a height suited to a car park's low obstacles without losing reliability (see the study on Google Scholar). One component ground-mounted farms do not have : a visual inspection of the structure itself — corrosion on posts and brackets, the condition of weatherproofing seals on the canopy roof, fixings for suspended equipment — an exercise close to the one we describe for inspecting a floating solar farm, where structure and output are checked in the same outing.

Beyond the fine: the real benefits, and 2026 prices

Reducing the topic to the mere threat of a fine would miss the point : a well-sized parking canopy delivers a concrete service. It shields vehicles from direct exposure that, in summer, speeds up the ageing of interior plastics and makes the cabin barely bearable ; it limits heat build-up on the asphalt surface ; and it gives a fleet operator or a site open to the public a natural anchor point for deploying chargers powered in whole or in part by local generation. A study by H. Fakour, M. Imani and co-authors, published in 2023 in Scientific Reports, modelled this pairing on a car park in Kaohsiung, Taiwan : the solar roof sized for the site there produces around 140 MWh a year, enough to power more than 3,000 one-hour charging sessions a month, for roughly 94 % less CO2 than conventional grid supply (see the study on Google Scholar). The figures do not translate as-is to a French car park — sunlight, site size and the electricity mix all differ —, but they show why more and more operators are pairing a canopy with charging infrastructure at the design stage rather than treating the two as separate projects.

2026 prices (excl. VAT) : €600 to €1,500 for an upfront drone feasibility survey (georeferenced 3D model of the car park, solar-shading study, layout note) on a car park up to 1 hectare, €1,500 to €3,500 beyond that, depending on surface area and the number of layout scenarios to compare ; €800 to €1,800 for a post-commissioning control thermography, including the IEC 62446-3 pass, a visual structural check and a non-conformity report ranked by severity ; €400 to €900 for an annual follow-up check once the first baseline thermography has been carried out. Administrative steps (prior planning notice, planning permission) remain the design office's or architect's responsibility and are priced separately. Request a quote stating the car park's surface area, its regulatory deadline (2026 or 2028) and whether the project is at the feasibility or post-installation control stage.

Frequently asked questions

Which car parks are subject to the solar canopy obligation, and since when?

Any outdoor car park over 1,500 m² that already existed on 1 July 2023 falls under the APER law. Car parks over 10,000 m² had to comply by 1 July 2026 — a deadline already passed — while smaller ones, between 1,500 and 10,000 m², have until 1 July 2028. Covered or underground car parks are not affected.

Can a drone replace the design office for a parking canopy project?

No, and that is not its role : the drone supplies the topographic data and the georeferenced 3D model the design office relies on to size the layout, calculate expected output and build the regulatory file. It is a survey tool, not a substitute for engineering — the same relationship described in our guide to drone-based sunlight and shading studies.

How does thermography on a parking canopy differ from a ground-mounted solar farm?

In geometry and surroundings : a canopy sits low, surrounded by lighting masts and often EV chargers, and the car park generally stays in use during the flight, which calls for a more constrained flight plan than over open ground. It also adds a structural component — corrosion, weatherproofing, fixings — that thermal inspection alone does not cover.

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