Eneres Signs Off-site PPA with Sumitomo Heavy Industries Group to Supply Surplus Solar Power

Eneres has signed a physical off-site PPA with Sumitomo Heavy Industries and Sumitomo Heavy Industries Modern, and began supplying surplus electricity generated by solar power facilities on April 24, 2026. Acting as both a retail electricity provider and aggregator, Eneres has since last November been supplying renewable electricity generated at Sumitomo Heavy Industries Modern’s Futtsu No. 1 and No. 2 plants, which could not be fully consumed onsite, to the company’s Yokohama headquarters. As surplus power still remained, supply has now been expanded to Sumitomo Heavy Industries’ Tanashi Works. As Japan promotes renewable energy as a main power source, more companies are installing solar power facilities, but self-consumption solar systems often generate excess electricity that is not fully utilized. Supplying surplus power to other sites through an off-site PPA can improve renewable energy use, but requires advanced forecasting of weather-dependent solar generation and power demand across multiple locations, as well as timely matching. Sumitomo Heavy Industries Group aims to achieve carbon neutrality by 2050 and has set a target of reducing Scope 1 and 2 CO2 emissions by 50% by 2030 compared with 2019. Eneres has expertise in power supply-demand management, including forecasting demand, generation, and surplus electricity, as well as aggregation technologies for efficient energy operation. By applying these strengths, the companies have enabled surplus electricity to be supplied within the Sumitomo Heavy Industries Group and maximized the use of renewable energy. The off-site PPA uses solar facilities located at Sumitomo Heavy Industries Modern’s Futtsu No. 1 and No. 2 plants, with capacity of approximately 600 kW. Demand sites include Sumitomo Heavy Industries’ Tanashi Works and Sumitomo Heavy Industries Modern’s Yokohama headquarters plant. The project is expected to reduce CO2 emissions by about 132 tons annually.