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As previously reported, NTT and Tokyo Electric Power have jointly established a new company and agreed to jointly develop data center and battery storage businesses. This time, I will focus on introducing the battery storage business.

Outlook for the Battery Storage Business

NTT Anode Energy and Tokyo Electric Power Holdings have agreed to expand the application area of batteries and reduce costs at the Tsumagoi Battery Storage facility. This storage facility will use lithium-ion batteries, with a capacity of 9.3MWh and an output of 2MW.

Moving forward, both companies plan to use their assets and know-how in electricity and telecommunications to meet increasingly sophisticated social needs, such as carbon neutrality, and aim to create new value and become leaders in building a sustainable society.

So, why focus on battery development?

The Importance of Batteries in Data Center Operations

Data centers consume a massive amount of electricity, necessitating the use of renewable energy. However, ensuring a stable supply of vast amounts of power is a challenge. This is because the power generation from renewable energy varies depending on weather and time. While short-term fluctuations can be covered by UPS (Uninterruptible Power Supply) and emergency generators, they are not sufficient for frequent disruptions and pose a critical flaw for data center services. The use of batteries allows for coping with these fluctuations in power generation, enabling a stable supply of renewable energy. This is expected to promote the use of environmentally friendly energy in data center operations. Although the use of batteries has been considered before, their implementation in data centers has not progressed due to both the capacity of power storage and cost.

Expectations for the Technology and Initiatives of Both Companies

Battery technology is an extremely important theme across the industrial world, particularly in the data center industry. The path to addressing this theme is anticipated to advance through the establishment of a new company by NTT and Tokyo Electric Power, focusing on the development of large-capacity batteries in MW units and cost reduction, leading to widespread adoption in the data center industry.

Tokyo Electric Power Holdings and NTT announced on December 19, 2023, two new initiatives in their collaborative business.

Data Center Business

The first is the data center business. NTT Data Group, NTT Global Data Centers, and Tokyo Electric Power Grid have agreed to jointly develop and operate a new company in the Inzai Shirai area of Chiba Prefecture, aimed at establishing a data center. They plan to establish a special purpose company within the fiscal year 2023, develop a data center with a power capacity of 50 MW, and aim to open and start services in the second half of fiscal 2026.

With the proliferation of generative AI, there is an expected increase in demand for data centers. Both companies have indicated a policy to leverage their expertise to aim for an advanced data center model, taking into account the realization of carbon neutrality.

Storage Power Plant Launch

The second initiative is the storage power plant business by TEPCO Holdings and NTT Anode Energy. In November, they established a limited liability company, ‘Tsumagoi Storage Power Plant LLC’, in Tsumagoi Village, Agatsuma District, Gunma Prefecture. They are preparing for the construction of the storage power plant and other preparations, aiming to start the business in 2025.

In the context of advancing the introduction and utilization of renewable energy towards the realization of carbon neutrality by 2050, issues such as securing adjustment power and enhancing the power system that become necessary are becoming evident.

To address these issues, TEPCO Holdings and NTT Anode Energy have been utilizing batteries in their efforts. By bringing together the expertise both companies have cultivated and collaborating in the increasingly necessary storage power plant business, they aim to expand the application area of batteries, reduce costs, and further develop the storage power plant business.

Future Trends Worthy of Attention

In 2020, the power consumption of data centers accounted for 2.1% of the total power consumption (913.5 billion kWh), an increase from about 1.4% in 2018. Furthermore, according to a report by the International Institute for Environmental Economics, if the trend of increasing computational load continues into the future, it is expected to reach 90 TWh domestically by 2030.

The establishment of new companies by NTT and TEPCO, Japan’s largest data center operators, to meet the growing power demand in a carbon-neutral way is garnering attention from the entire industry.

As this is an important topic in discussing Japan’s data center market, we will continue to follow these developments.”