In 2023, the global roof‑mounted systems sector showed strong momentum. From the construction of large venues to new energy explorations at the household level, related technologies continued to deepen not only in photovoltaics but also expanded into wind power, large‑span steel structures, and other fields. Below is a summary of key news and trends in this area for 2023.

I. Technological Innovation: Addressing the “Load‑Bearing” Pain Point and Lightweight Design

In 2023, a core direction of technological innovation was solving the problem of old or lightweight roofs being unable to bear heavy loads.

RABLE’s self‑supporting system (Netherlands): Facing the issue that more than 50% of commercial roofs in the Netherlands cannot support solar panels due to insufficient structural strength, Dutch start‑up RABLE developed an innovative self‑supporting mounting system. Using patented cable technology and truss design, the system requires no ballast or expensive roof renovation, allowing PV panels to be installed on roofs that were previously unable to carry heavy loads. This technology is expected to unlock a roof area equivalent to about 9,000 football fields in the Netherlands. The company received €2.5 million in funding.

Lightweight and waterproof patents from Chinese companies: Chinese enterprises also actively advanced related technologies. LONGi Green Energy obtained a patent for a novel PV frame that simplifies the installation process without the need for additional fasteners. Meanwhile, Rixin Technology received two patents in 2023, covering a “roof‑integrated waterproof PV mounting structure” and a “PV installation structure for corrugated steel roofs,” focusing on solving waterproofing pain points of roof‑mounted PV and the reinforcement and installation challenges on aged corrugated steel roofs.

II. Engineering Applications: From Mega Venues to Commercial Factories

In 2023, roof‑mounted systems saw several landmark large‑scale projects, demonstrating their great potential in commercial and public buildings.

Large cultural & sports centre in China: In April 2023, the steel‑structure roof of the Xinqiao Town Cultural & Sports Centre in Jiangyin, Jiangsu, was lifted into place, weighing 2,588 tonnes. The contractor used hydraulic integrated lifting technology to raise a 10,000 m² steel roof in one go, showcasing China’s top‑tier construction capabilities for large‑venue roof systems.

Ice & snow world and commercial centre: The approx. 3 MW roof‑mounted PV project at the Shanghai Yaoxue Ice & Snow World was completed at the end of the year, overcoming the challenge of installing on an irregular roof at a height of 79 metres, with an expected annual power generation of 4 million kWh. In the United States, Emergent Solar Energy completed a 210 kW roof‑mounted PV installation for Abel Construction, projected to generate more than 280,000 kWh of clean electricity per year.

III. Diversified Exploration: Breakthroughs in Rooftop Wind Power

Although PV is the mainstream, roof‑mounted systems also achieved academic and practical progress in wind power in 2023.

Development of small wind turbines: A research paper published in December 2023 detailed a roof‑mounted stand‑alone wind turbine system designed specifically for low wind speeds (1‑12 m/s) and low‑altitude areas. Optimised for household power generation, the system was experimentally validated, offering a new possibility for “wind‑solar” hybrid systems on urban buildings.

IV. Market Trends and Policy Impact

Market data from 2023 indicates that roof‑mounted systems are becoming more widespread and efficient.

Increased market penetration: According to a tracking report from Lawrence Berkeley National Laboratory (USA), distributed solar (including roof‑mounted systems) continued to grow in 2023, with steady improvements in system efficiency.

Policy incentives: The US Inflation Reduction Act boosted the return on investment for commercial and industrial rooftop solar projects through enhanced federal tax credits, facilitating projects such as the Abel Construction installation.

Summary

The roof‑mounted systems industry in 2023 moved towards “lighter, stronger, smarter” development. Whether through RABLE’s lightweight innovation that gives new life to old roofs or through large‑scale hydraulic lifting of mega‑venue roofs, the value of rooftop space as a key platform for energy production is being unlocked more deeply than ever before.