1.1 True "Walkable Solar Panels" Enter European & US Markets

In September 2024, Turkey's largest solar manufacturer Ankara Solar announced the official launch of its "Walkable Solar Panels" into European and American markets. Unlike conventional fragile glass panels, this new product, named PV Floor, is engineered to withstand heavy foot traffic, impacts, and abrasion, while being waterproof and dustproof.

Technical breakthrough: These panels are not only durable but also feature IoT integration, enabling uninterrupted power supply from storage during nighttime or cloudy conditions, with an anti‑slip surface.

Application scenarios: This completely overturns the traditional notion that solar panels belong only on roofs. They can be installed on shopping centre floors, park pathways, office building floors, or even home floors, turning urban ground surfaces into generators.

1.2 Domestic "Rooftop PV Walkway" Patent Solves Space Constraints

In China, conventional rooftop PV projects often waste valuable generation space because separate cable trays must be installed. In December 2024, the China National Intellectual Property Administration published a patent (authorisation number CN 222215655 U) obtained by Anhui Provincial Energy Trading Co., Ltd. for a "Composite Bridge for Rooftop PV Walkways."

Design concept: This patent integrates the maintenance walkway and cable tray into one structure. Under normal conditions, the load‑bearing deck serves as a safe walking path; when maintenance is needed, the deck can be opened to reveal a channel that directly accommodates cables.

Core value: This design greatly saves the roof space occupied by conventional cable trays, allowing more solar panels to be installed on industrial and commercial buildings where space is at a premium.

2. 2024 Codes & Standards: Establishing a "Lifeline" for Fire Safety

In 2024, numerous international and Chinese local authorities have issued updated technical standards and construction management notices, with one central theme: mandatory requirements for rooftop access pathways.

2.1 Updates to International Fire Codes (I‑Codes)

In the United States, several amendment proposals (e.g., RB141‑25, F165‑24) to the International Fire Code (IFC) and International Residential Code (IRC) have been put forward in 2024, further clarifying access and spacing requirements for PV arrays.

Width specifications: For commercial and apartment buildings, a minimum 6‑foot (approx. 1829 mm) wide pathway must be provided around the PV array; for residential roofs, the pathway width shall be no less than 36 inches (914 mm) to allow firefighters to perform ventilation and firefighting operations.

Smoke vents: The codes emphasise that PV installations must not obstruct roof smoke vents or rescue access points, and an emergency egress pathway of no less than 36 inches must be reserved at array entry/exit points.

2.2 Rapid Issuance of Local Standards in China

In 2024, Chinese localities such as Meizhou (Guangdong), Wuhu (Anhui), and Anji (Zhejiang) have introduced new policies that refine restrictions on walkways and installation zones:

Height and setback limits: Many local documents specify that the highest point of PV modules shall be no more than 1.5 m to 2.2 m above the roof surface, and parapets must be used as barriers to prevent falling hazards. For industrial enterprises, Anji County requires the highest point of PV modules to be no higher than 1.8 m, and strictly prohibits using the space under PV panels to enclose unauthorised warehouses or living spaces.

No full enclosure: Governments forbid the four‑sided enclosure of under‑panel spaces, which would create illegal and unsafe building uses.

Construction safety walkways: The 2024 "Safety Work Code for Distributed Photovoltaic Construction" (T/CERS 0024‑2024) emphasises the need for safe access routes at construction sites to provide safe spaces for cleaning, inspection, maintenance, and replacement of PV equipment.

3. Practice & Challenges in 2024: Balancing Aesthetics, Safety, and Public Opinion

Despite technological and regulatory progress, the real‑world implementation of rooftop PV walkways and installations in 2024 has exposed many practical problems.

In pilot projects in residential neighbourhoods in first‑tier cities like Shanghai, as many as 80% of residents opposed rooftop PV installations. Their main concerns included: PV panels installed too high or too close to roof edges, creating falling hazards; and the risk of drilling holes that could damage the roof membrane and cause leaks. These real‑world disputes reflect an imbalance between walkway safety and living experience. This serves as a reminder that future designs of roof walkways and mounting structures must give equal weight to aesthetics and structural safety in order to gain acceptance.

4. International Perspectives: Lessons from Failures and Bolder Experiments

4.1 The "Solar Pavement" Lesson from Malta

In March 2024, Maltese media highlighted a cautionary tale. A government‑funded €70,000 pedestrian pavement embedded with PV panels in Rabat was found, after several years of operation, to generate only one‑fifth of the officially claimed output. This warns the industry that when promoting "solar walkways," technological maturity and true generation efficiency must be verified, avoiding superficial vanity projects.

4.2 The First Fully Operational Solar Highway in the US

In October 2024, Peachtree Corners, Georgia, in partnership with The Ray, launched the first fully operational solar roadway in the United States. Although not technically a rooftop system, it demonstrates the potential of integrating solar walkways into transportation infrastructure and smart city developments.