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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.”

Amid the issues of centralization of data centers becoming apparent, the government is working on decentralizing data centers to regional areas. Several ministries have already started projects and considerations in this regard.

Data Center Construction Revealed in Mihara City, Hiroshima Prefecture

It has been revealed that a Tokyo-based company is constructing a large-scale data center in the Hongo Industrial Park in Mihara City, Hiroshima Prefecture, to speed up data processing and enhance stability. This company is said to be a group company of the American IT giant Google. The Hongo Industrial Park, funded by Hiroshima Prefecture and Mihara City, has a 275,000 square meter site developed two years ago, and the land was sold for about 5.8 billion yen in a contract concluded on November 17. The investment for the development of the data center is expected to be around 100 billion yen.

Reasons for Choosing Hongo Industrial Park

According to Hiroshima Prefecture, the Hongo Industrial Park was chosen for several reasons: the data center handles a vast amount of information, so a location with less disaster risk was preferred. Also, it is located about 15 minutes by car from Hiroshima Airport and is close to a highway interchange, which is advantageous for maintenance, inspection, and equipment updates.

The company plans to develop the facility in stages, with all facilities expected to be operational around 2033. The prefecture, in cooperation with Mihara City, plans to provide necessary support going forward.

Ministry of Economy, Trade and Industry Supports Regional Distribution of Data Centers

The Ministry of Economy, Trade and Industry announced that it would subsidize up to 30 billion yen for a new data center to be built by SoftBank in Tomakomai City, which will be used for developing AI, including generative AI.

As data centers in Japan are concentrated around Tokyo and Osaka, distributing them to regional areas aims to prepare for large-scale disasters and alleviate regional imbalances in electricity load caused by their massive power consumption.

Economy, Trade, and Industry Minister Nishimura said in a press conference after a Cabinet meeting on November 7, “We want to continue to support the regional distribution of data centers as it also promotes the use of renewable energy available in rural areas.”

Focus on the Trend Towards Regional Distribution of Data Centers

With the remarkable evolution of AI like ChatGPT, it is essential to ensure a good communication environment as the foundation for data exchange. If there are issues with the communication environment, it could cause significant stress to users due to the large amount of data exchanged. From the perspective of maintaining urban functions, the concentration of data centers in certain areas raises concerns about the potential strain on urban electricity. Therefore, the regional distribution of data centers is crucial for risk diversification.

The construction of data centers could potentially revitalize local economies. It is important to pay close attention to the ongoing trend of regional distribution of data centers.

During a recent trade mission from Ireland to South Korea, a contract was signed between Irish development company LLUMCLOON Energy and a construction subsidiary of SK Group.

According to the Irish Times, the two companies are planning a “fuel cell-powered data center” in Ireland that will not be connected to the electricity grid and will use gas fuel cells.

What is a fuel cell?

A fuel cell is a device that uses energy to generate electricity.

A chemical reaction between a vehicle’s fuel (usually hydrogen) and an oxidizing agent such as oxygen. In particular, solid oxide fuel cells (SOFCs) operate at high temperatures and are highly efficient, but typically use hydrocarbon fuels such as natural gas.

This chemical energy is converted into electrical energy, which is expected to transition to hydrogen in the future as more environmentally friendly fuel sources advance.

SK plant advancing fuel cell development

SK Ecoplant, formerly known as SK E&C, is a construction subsidiary of the South Korean conglomerate SK Group, which owns companies such as SK Telecom and SK Hynix. In collaboration with Bloom Energy, based in San Jose, the company is currently advancing the development of fuel cell and hydrogen power generation facilities.

Ther are not only providing crucial technology but also taking on a comprehensive role in the construction of data centers.

The Potential of Fuel Cells in Data Centers

The demand for data centers is increasing. The energy consumption, strain on power grids, and carbon dioxide emissions from data centers have been the subject of much political debate in recent years.

While details regarding the development schedule and operational capacity are yet to be disclosed, this initiative represents a significant step forward for future green energy solutions in Ireland.

Major global tech giants such as Microsoft and Amazon are also exploring fuel cell applications to power their data centers, signaling an industry-wide shift towards more sustainable backup and primary power sources.

The success of the plan could potentially set a benchmark for the future development of fuel cells in data centers across Europe, Japan, and other regions.