Windows and walls could generate electricity as glass-integrated solar cells head for the market, though costs remain several times higher than ordinary glass.
Panasonic Holdings' perovskite solar cells on October 20 in Minato Ward, Tokyo. (©Sankei)
Panasonic Holdings announced on October 20 that it will begin full-scale production of next-generation perovskite solar cells in April 2029, one year ahead of schedule.
The glass-integrated technology is designed to turn building windows and walls into electricity-generating surfaces, expanding opportunities for renewable energy.
Sales of pre-production units began in September 2026 as the company moves toward full-scale commercialization.
Thin, Lightweight, and Integrated Into Glass
Perovskite solar cells are thin and lightweight, allowing them to be installed in a variety of locations. Panasonic's glass-based version offers greater durability and design flexibility. According to the company, the technology can be incorporated into windows and railings, where conventional solar panels are difficult to install.
"We want to make it possible to generate electricity from surfaces that have previously gone unused, including those on buildings," said Yuichi Yoshikawa, head of Panasonic's Corporate R&D Strategy Office.
Production Plans and Early Installations
Panasonic originally planned to begin mass production in fiscal 2030 but moved the timeline up ahead of technological advances and rising demand.
Panasonic is currently manufacturing pre-production units in Moriguchi, Osaka Prefecture, while full-scale production will begin at a new facility under construction in Nagahama, Shiga Prefecture.
Marketed as Eneface, the panels feature a power-generating layer applied directly to glass. Laser processing lets manufacturers customize their transparency and patterns. Initial mass-produced panels will measure 1.8 meters by 1.2 meters.
The technology began operating at a port facility in Kobe in September 2026. The panels are also slated for installation in a Hankyu Hanshin Properties building scheduled for completion in December 2027.
Cost and Durability Remain Challenges
Cost and durability remain major hurdles. The glass-based panels currently cost several times as much as conventional architectural glass.
"We are aiming to keep the initial price to no more than five times that of conventional glass," a Panasonic representative said.
Competitors Push Ahead With Commercialization
Other companies are also working to bring perovskite solar cells to market. Sekisui Chemical began commercializing its film-based technology in 2026 and plans to launch a production line with an annual capacity of 100 megawatts in fiscal 2027. Kaneka, meanwhile, aims to begin sales in fiscal 2028.
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(Read the article in Japanese.)
Author: Hiroto Kuwajima, The Sankei Shimbun