Located in Hongkou District, Shanghai, China, the Heping Bookhouse features an iconic arc-shaped roof resembling inverted books. The project’s key challenge lay in the strict weight requirements for photovoltaic (PV) components imposed by the large-span roof structure.

Polyshine Solar developed an innovative "glass-free, plastic-based" lightweight PV solution tailored for the bookhouse, adopting a low-impact development model to seamlessly conform to the curved roof surface. This approach preserved the building’s original aesthetic while empowering the roof with self-sustaining green energy generation.

Lightweight & Flexible
Ultra-thin silicon wafers and advanced organic encapsulation materials reduced load pressure by 70%, while a 0.5m bending radius ensured perfect integration with the curved roof.

High Efficiency & Durability
Incorporating polymer chain group modification technology, the modules deliver high light transmittance, weather resistance, and water resistance, achieving up to 21% conversion efficiency and ensuring 25-year operational longevity.

Invisible Aesthetics
The matte surface harmonizes with the roof’s color palette, embedding technology into nature. This anti-glare design enhances the eco-friendliness of the park-based library.

Effortless Installation
Requiring no traditional mounting brackets or structural modifications, the adhesive-based installation enables rapid, unobtrusive deployment.

By day, Polyshine Solar’s PV modules efficiently convert sunlight into electricity; by night, they illuminate the bookhouse. Powered by perpetual green energy, this 24-hour public reading space sustains both ecological and cultural vitality, fostering an enduring legacy of knowledge and sustainability.