Eneres Signs Off-Site Physical PPA with Sumitomo Heavy Industries Group, Expanding Solar Surplus Power Supply to Tanashi Works

Eneres Co., Ltd. (Chiyoda-ku, Tokyo; President and Representative Director: Goro Suzuki) has signed an off-site physical PPA with Sumitomo Heavy Industries, Ltd. (Shinagawa-ku, Tokyo; President and Representative Director: Toshiro Watabe) and Sumitomo Heavy Industries Modern, Ltd. (Yokohama, Kanagawa; President and Representative Director: Katsuyuki Nakano; wholly owned by Sumitomo Heavy Industries). On April 24, 2026, Eneres began supplying surplus electricity generated by solar power facilities. As both a retail electricity provider and aggregator, Eneres has been supplying renewable electricity generated by solar power facilities installed at Sumitomo Heavy Industries Modern’s Futtsu No. 1 and No. 2 plants since last November. The electricity that could not be consumed within those plants has been supplied to Sumitomo Heavy Industries Modern’s Yokohama headquarters. Since surplus power still remained, Eneres has now started supplying off-site PPA electricity to Sumitomo Heavy Industries’ Tanashi Works as well. As the Japanese government promotes renewable energy as a main power source, more companies are installing solar power facilities to increase their renewable energy usage. However, with self-consumption solar systems, it is not uncommon for generated electricity to exceed on-site consumption, leaving surplus power unused. Failure to fully utilize surplus electricity not only prevents companies from maximizing the decarbonization potential of renewable energy, but can also delay recovery of their capital investment. One way to maximize surplus electricity usage is to supply it to other sites through an off-site PPA scheme. This requires accurate forecasting of solar output, which is highly weather-dependent, as well as advanced forecasting of electricity demand and timely matching of supply and demand. The technical difficulty increases further when electricity is shared across multiple sites. The Sumitomo Heavy Industries Group is working to reduce environmental impact from both its business activities and the environmental performance of its products. The group aims to achieve carbon neutrality by 2050 and has set a target of reducing Scope 1 and Scope 2 CO2 emissions by 50% by 2030 compared with 2019 levels. Eneres has expertise in supply-demand management, its founding business, and possesses forecasting technologies for demand, generation, and surplus electricity, as well as aggregation technologies that manage and operate efficient energy use based on those forecasts. By applying these strengths, Eneres has enabled surplus electricity supply within the Sumitomo Heavy Industries Group, allowing renewable energy to be used to the fullest without waste. Sumitomo Heavy Industries Group and Eneres will continue to maximize effective use of renewable energy and contribute to Japan’s carbon neutrality goals. The off-site physical PPA covers solar facilities at Sumitomo Heavy Industries Modern’s Futtsu No. 1 and No. 2 plants in Futtsu, Chiba Prefecture. Operations began in April 2026. The power producer is Sumitomo Heavy Industries Modern, with generation capacity of approximately 600 kW. Eneres serves as the specified wholesale supplier, aggregator, and retail electricity provider. The electricity consumers and demand sites are Sumitomo Heavy Industries’ Tanashi Works in Yato-cho, Nishitokyo, Tokyo, and Sumitomo Heavy Industries Modern’s Yokohama headquarters plant in Kohoku-ku, Yokohama, Kanagawa. The expected CO2 reduction effect is approximately 132 tons per year. Sumitomo Heavy Industries, Ltd. is headquartered at 2-1-1 Osaki, Shinagawa-ku, Tokyo, with capital of 30,872,000 thousand yen. Founded in November 1888 and incorporated in November 1934, it is a comprehensive heavy machinery manufacturer operating in four segments: mechatronics, industrial machinery, logistics and construction, and energy and lifelines. Sumitomo Heavy Industries Modern, Ltd. is headquartered at 8-32-16 Shinyoshida-higashi, Kohoku-ku, Yokohama, Kanagawa, with capital of 200,000 thousand yen. Established in October 1955 and wholly owned by Sumitomo Heavy Industries, it designs, manufactures, sells, and services plastic extrusion molding equipment. Eneres Co., Ltd. is headquartered at Ochanomizu First Building, 2-5-1 Kanda Surugadai, Chiyoda-ku, Tokyo, with capital of 100,000 thousand yen. Established in December 2004, it is owned 59% by au Energy Holdings Corporation and 41% by Electric Power Development Co., Ltd. Its businesses include GX promotion support, corporate PPAs, J-Credit creation and distribution, GX information services, aggregation, electricity retail, and electricity business support. An off-site PPA, or Power Purchase Agreement, is a long-term contract under which an electricity user purchases renewable electricity and environmental value under a physical model, or only environmental value under a virtual model, from a power producer. Off-site refers to a structure in which renewable power generation facilities are installed outside the user’s premises, enabling the user to use renewable energy even when it cannot install generation equipment on its own site.