Approximately 2MW / 4MWh Storage Battery Facility Starts Operation in Kaga City, Ishikawa Prefecture
Hirasol Energy Co., Ltd. has announced the successful grid connection and commencement of operations for its "Ishikawa Prefecture Kaga City Bunkyocho Storage Facility" on April 1, 2026. This approximately 2MW/4MWh facility, managed by Hirasol Energy as an aggregator using its "J-EMS" system, aims to contribute to grid stabilization and the effective utilization of renewable energy by providing ancillary services.
📋 Article Processing Timeline
- 📰 Published: April 1, 2026 at 23:37
- 🔍 Collected: April 1, 2026 at 16:47
- 🤖 AI Analyzed: April 17, 2026 at 02:55 (370h 8m after Collected)
Background and Significance
With the massive introduction of renewable energy, the variability of power grids is increasing, making the securing of "ancillary services" (Note 1) a more critical issue than ever before. This storage facility is expected to provide ancillary services through the supply-demand adjustment market, promoting both the further dissemination of renewable energy and the stability of the power grid.
Overview of This Storage Facility
Aggregator: Hirasol Energy Co., Ltd.
Design and Construction: Hirasol Densetsu Co., Ltd.
Facility Name: Ishikawa Prefecture Kaga City Bunkyocho Storage Facility
Location: Bunkyocho, Kaga City, Ishikawa Prefecture
Grid Connection Date: April 1, 2026
Storage Facility Owner: G.K. SGB001
Battery Specifications
Battery Output: Approximately 2MW
Battery Capacity: Approximately 4MWh
Transformation and Distribution Equipment: WIN Corporation Battery System Transformation and Distribution Equipment "BS Series" x 1 unit
Main Activities by the Company
■ Design and Construction of the Storage Facility
The design, construction, and equipment procurement for this facility were handled by our subsidiary, Hirasol Densetsu Co., Ltd. From the design phase to grid connection, we have established a stable operational system by considering safety and maintainability, providing flexible responses tailored to the site environment and installation conditions, and supervising construction by our own engineers.
■ Introduction of Energy Management System "J-EMS"
We have introduced "J-EMS," an energy management system independently developed by our company, to optimally control the charging and discharging of the battery.
"J-EMS" accurately forecasts demand and market prices on the cloud side, bids in multiple markets such as the wholesale electricity market and the supply-demand adjustment market, and controls on-site equipment based on market instructions after winning bids.
It integrates with various devices through our self-developed hardware (edge) to achieve optimal charging and discharging. Through these controls, we contribute to maximizing the profitability of storage facilities and power plants, stable utilization of renewable energy, and further CO₂ reduction.
Future Development
Based on our independently developed energy management system "J-EMS," we will begin participating in the supply-demand adjustment market within the year and commence operations as an aggregator responsible for forecasting, control, and market bidding. Moving forward, we will leverage our strength in developing and implementing our own EMS and operating as an aggregator to promote grid-connected battery projects nationwide, contributing to the spread of renewable energy and the stabilization of power grids.
Note 1: Ancillary services refer to the adjustment functions necessary to match electricity supply and demand in real-time. As the proportion of renewable energy increases, output fluctuations become larger, making it important for distributed power sources such as batteries to take on these adjustment roles. The supply-demand adjustment market is a new market established for trading these ancillary services.
J-EMS is our proprietary energy management system, developed with support from the National Research and Development Agency NEDO's subsidy project "Industrial Technology Research and Development Program for the Discovery and Commercialization of Seeds for New Energy, etc.," which has undergone technical verification and refinement.
About Hirasol Energy Co., Ltd.
Hirasol Energy Co., Ltd. is a Tokyo University-born startup aiming to realize solar power generation that lasts for a century. By providing cutting-edge technology and digital solutions, we aim to maximize the business and social value of solar power plants. Our services include solar power plant performance restoration, the "Hyakunen Solar" (Hundred-Year Solar) business promoting centralized operation of power plants, and the provision of DX solutions related to solar power generation.
・Company Name: Hirasol Energy Co., Ltd.
・Head Office Location: Tokyo University Entrepreneur Plaza 501, 7-3-1 Hongo, Bunkyo-ku, Tokyo
・Representative Director: Li Min
・Business Activities: Hyakunen Solar business, solar power plant repair and restoration services, regional power support business, digital solution services related to solar power generation, and other related businesses.
・Established: February 21, 2017
・HP: https://pplc.co
・Inquiries: info@pplc.co
About Hirasol Densetsu Co., Ltd.
Hirasol Densetsu Co., Ltd. utilizes digital technologies such as power data analysis, performance evaluation, and energy management systems (EMS) developed by Hirasol Energy to perform performance restoration work for solar power generation facilities and construction work to improve the energy efficiency of factories, logistics centers, and commercial facilities. We achieve diversification of power sources, high efficiency of power costs, and sustainable energy supply. (Licensed Contractor: Tokyo Governor's License No. 159020)
・Company Name: Hirasol Densetsu Co., Ltd.
・Head Office Location: Tokyo University Entrepreneur Plaza 401, 7-3-1 Hongo, Bunkyo-ku, Tokyo
・Representative Director: Koji Yamaguchi
・Business Activities: Electrical contracting related to renewable energy and decarbonization businesses, construction and contracting of building and civil engineering works, and other related businesses.
・Established: May 29, 2024
・HP: https://e.pplc.co/