News, 22 August 2025
Toyota and Mazda have teamed up to begin field testing Toyota’s innovative “Sweep Energy Storage System” at Mazda’s Hiroshima Plant. This cutting-edge setup uses batteries from electrified vehicles to stabilize and optimize renewable energy use, aiming to support Japan’s push toward carbon neutrality while fostering a robust battery ecosystem.
In a bold move to drive sustainable mobility, Toyota Motor Corporation and Mazda Motor Corporation have launched collaborative field tests of the Sweep Energy Storage System at Mazda’s headquarters in Hiroshima Prefecture—the only automaker-operated power generation site in Japan トヨタ自動車株式会社 公式企業サイト+1.
The test setup will interconnect Mazda’s on-site power system and Toyota’s electrified-vehicle battery storage system via sophisticated energy management networks. Together, they’ll verify whether they can deliver stable, efficient, and high-quality charging and discharging performance. One of the key goals: to buffer the fluctuations in power supply coming from weather-dependent renewable sources like solar or wind, helping smoothen the demands of the grid and reinforce carbon-neutral energy usage.
This test marks a strategic step toward shaping a sustainable battery ecosystem—a concept capturing one of the seven major issues identified by the Japan Automobile Manufacturers Association. The vision is to sustainably reuse electrified vehicle batteries within Japan, reinforcing resource procurement stability and supply-chain resilience.
Toyota and Mazda see this initiative as more than a pilot—it’s part of a broader, multipathway strategy. They remain committed to jointly innovating across the industry to accelerate carbon neutrality and boost competitive strength.
