#Japan #Osaka #solar cells #YKK AP #Panasonic HD

Groundbreaking Solar Technology Development

In a move that showcases innovation in renewable energy, YKK AP Corporation and Panasonic Holdings Corporation have begun the implementation verification of a building-integrated photovoltaic (BIPV) system using glass-type perovskite solar cells. This significant trial is taking place at the Tanimachi YF Building in Osaka, marking the first deployment of its kind in Japan for the installation of these advanced cells in inner windows.

Background of the Project

This initiative comes after the Japanese government outlined its 7th Energy Basic Plan in February 2025, which aims to elevate the share of solar power in the energy mix to between 23% and 26% by 2040. The plan explicitly mentions the introduction of perovskite solar cells as a crucial component of its strategy. In densely populated areas like Japan, utilizing the surfaces of buildings, such as windows and walls, for solar power generation is essential. The project also emphasizes the importance of aesthetics and transparency in the design of solar installations.

Unique Features of the Technology

The glass-type perovskite solar cells being tested are developed by Panasonic and incorporate innovative material technology, inkjet coating methods, and laser processing techniques. These characteristics allow for high customizability in terms of size and transparency, along with enhanced durability as solar panels integrated into building materials. Additionally, by designing a BIPV inner window, YKK AP has created a unique sash frame tailored for these solar cells, allowing for energy-efficient insulation while simultaneously generating power.

The BIPV inner window not only enhances the energy efficiency of buildings but also minimizes visual impact on the exterior, appealing to designers and architects alike. YKK AP’s commitment to high-quality installation, maintenance, and aesthetics ensures the feasibility of this technology in real-world applications.

Objectives and Scope of the Verification

The goals for this verification project include:
1. Exploring methods of installing glass-type perovskite solar cells on inner windows suited for various window sizes while assessing construction feasibility (the verification will not include performance checks or grid connections).
2. Evaluating the transparency, aesthetic appeal, and visibility of four different designs of the solar cells.

Overview of the Validation Process

• - Duration: Scheduled from November 20, 2025, for approximately one year.
• - Location: 8th floor, Tanimachi YF Building, 4-8-7 Tanimachi, Chuo Ward, Osaka City (Not open to the public).
• - Product Specs: Four inner windows made by YKK AP fitted with four prototypes of perovskite solar cells developed by Panasonic. Each solar cell measures 723mm in width and 1080mm in height, available in four different designs that include graphics and gradient patterns, while also exploring varying transparencies.

Role of Each Company in the Verification

• - YKK AP’s Responsibilities:

- Providing the implementation site (Tanimachi YF Building 8th floor)
- Designing and manufacturing BIPV inner windows
- Conducting installation work
- Assessing construction feasibility considering wiring arrangements
- Evaluating transparency and aesthetic appeal during the window’s installation phase.

• - Panasonic HD’s Contributions:

- Manufacturing the four prototypes of the glass-type perovskite solar cells focusing on customization for size and aesthetics
- Collaborating on installation and construction designs
- Overseeing evaluations of transparency and artistic expression during the window installations.

Conclusion

The collaboration between YKK AP and Panasonic aims at transforming energy utilization in urban settings by expanding the potential for solar power generation through building surfaces. This trial marks an important step toward adopting sustainable practices in construction and energy supply, as both companies aspire to contribute to the future of smart, eco-friendly urban development. Through this innovative project, new solutions enhancing onsite renewable energy generation will be explored further.