Nippon Chikudenchi Begins Operations of Grid-Scale Battery Storage Facility in Tottori City in Partnership with Digital Grid

Nippon Chikudenchi Co., Ltd. and Digital Grid Co., Ltd. have announced the commencement of operations for the 'NC Tottori City Ketaka-cho Battery Storage Plant', a grid-scale battery storage facility in Ketaka-cho, Tottori City, for the supply-demand adjustment market, effective May 13, 2026.

The facility is designed to contribute to a stable regional power supply by absorbing and leveling fluctuations in renewable energy output. It is positioned as a model case for supply-demand adjustment businesses utilizing grid-scale battery storage.

**Facility Overview:** - Facility Name: NC Tottori City Ketaka-cho Battery Storage Plant - Location: Ketaka-cho, Tottori City, Tottori Prefecture - Rated Output/Capacity: Battery System 1,988 kW / 8,146 kWh (System by TMEIC, Batteries by CATL) - Supply-Demand Adjustment Operation Start Date: May 13, 2026 - Aggregator: Digital Grid Co., Ltd.

With the expansion of renewable energy, managing fluctuations in electricity supply and demand has become a critical issue for Japan's energy system. Battery storage is gaining attention as a key infrastructure for stabilizing the grid and advancing the electricity market by bridging the time gap between generation and consumption.

In this project, the companies collaborate with the following roles: - Nippon Chikudenchi: Overall project development, operation, and on-site management. - Digital Grid: Aggregation services and support for market entry, including the supply-demand adjustment market, utilizing its Digital Grid Platform. This partnership aims to establish a sustainable power adjustment model integrating technology, operations, and market access.

**Future Developments:** Nippon Chikudenchi plans to promote the development of grid-scale battery storage plants across Japan. The company aims to establish a regional energy model that integrates operations across the JEPX (wholesale market), supply-demand adjustment market, capacity market, and disaster-relief energy support. Through its collaboration with Digital Grid, the company will contribute to the stable utilization of renewable energy and the realization of a decarbonized society.