May 29, 2023

Development and Verification of Stationary Storage Battery System Using Electric Vehicle Storage BatteriesAiming to Build a Stable Energy Supply System and Realizing a Recycling-Oriented Society with Storage Batteries

Tokyo Electric Power Company Holdings, Inc.
Toyota Motor Corporation

Tokyo Electric Power Company Holdings, Inc. (TEPCO HD) and Toyota Motor Corporation (Toyota) have developed a stationary storage battery system (1 MW output, 3 MWh capacity) that combines TEPCO's operating technology and safety standards for stationary storage batteries and Toyota's system technology for electrified vehicle storage batteries. This system will be installed in the Eurus Tashirotai Wind Farm^*1 by Toyota Tsusho Corporation and Eurus Energy Holdings Corporation, and the four companies will begin a collaborative verification project around fall of this year.

The storage battery market is expected to continue growing in light of the spread of renewable energy and electrified vehicles, as well as the global trend toward carbon neutrality.

It will be necessary to utilize storage batteries for electrified vehicles in the future to meet the increasing demand and needs for energy storage in environmental and economic improvement, participation in the electric power market, and as BCP measures among others, both in terms of price and quantity.

To this end, TEPCO HD and Toyota have jointly developed a stationary storage battery system that can be used in combination with existing PCS^*2 by connecting multiple storage batteries for electric vehicles. The verification project will confirm the system's operation and performance as well as feasibility, including its potential for business use in the electricity market.

TEPCO HD will utilize the knowledge and technological capabilities it has cultivated in the electric power business to improve the utilization of renewable energy and meet the BCP needs of its customers, as well as to maintain the balance between supply and demand of electric power in order to build a stable energy supply system.

In addition to aiming for a carbon-neutral mobility society, Toyota will work with Toyota Industries Corporation, Toyota Tsusho Corporation, and Denso Corporation to utilize storage batteries for electrified vehicles that are safe, long-lasting, high quality, low cost, and high performance, as part of its various activities to realize a circular economy (an economic system based on resource recycling).

TEPCO HD and Toyota will evaluate the results of the verification project and work to develop storage battery systems with an eye toward consumer-oriented energy services and balancing electricity supply and demand capabilities in order to meet the energy storage needs of customers.

In addition, TEPCO HD and Toyota will promote the use of storage batteries throughout society by continuing their efforts to build an energy system through local production for local consumption, and realize a recycling-oriented society for electrified vehicle storage batteries.

Verification project schedule

Around summer 2023

Construct facilities, evaluate storage battery system
Around fall 2023

Start verification tests

Operation and performance evaluation will take place over the next several years of operation.

Implementation structure

*1	Eurus Tashirotai Wind Farm A large-scale wind power plant owned by Eurus Energy Holdings Corporation, a subsidiary of Toyota Tsusho Corporation
*2	PCS Equipment that connects storage batteries as a DC power source to supply AC power to the electric power system and various electrical equipment
*3	EMS Energy Management System

"Achieving zero, and adding new value beyond it"

As part of efforts to pass our beautiful "Home Planet" to the next generation, Toyota has identified and is helping to solve issues faced by individuals and overall society, which Toyota calls "Achieving Zero," hoping to help reduce the negative impacts caused by these issues to people and the environment to zero. Additionally, Toyota is also looking "Beyond Zero" to create and provide greater value by continuing to diligently seek ways to improve lives and society for the future.

About Beyond Zero: https://global.toyota/en/mobility/beyond-zero/

Toyota Motor Corporation works to develop and manufacture innovative, safe and high-quality products and services that create happiness by providing mobility for all. We believe that true achievement comes from supporting our customers, partners, employees, and the communities in which we operate. Since our founding over 80 years ago in 1937, we have applied our Guiding Principles in pursuit of a safer, greener and more inclusive society. Today, as we transform into a mobility company developing connected, automated, shared and electrified technologies, we also remain true to our Guiding Principles and many of the United Nations' Sustainable Development Goals to help realize an ever-better world, where everyone is free to move.