"HOBE ENERGY," a Provider of Next-Generation Battery Storage Solutions, Establishes Its First Track Record by Implementing Its Proprietary EMS in a Grid-Scale Battery Storage Plant; The 5MWh "Kaminara Battery Storage Plant" Begins Operation

HOBE ENERGY Co., Ltd. (Headquarters: Minato-ku, Tokyo; Representative Director and President: Kyoichi Okino; hereinafter "HOBE ENERGY") announces that the "Kaminara Battery Storage Plant," which Japan Energy Storage Development Institute Co., Ltd. (Headquarters: Minato-ku, Tokyo; Representative Director: Akira Hoshino; hereinafter "JESDI"), a company engaged in the development and promotion of Battery Energy Storage Systems (BESS) for grid applications, had been developing in Kumagaya City, Saitama Prefecture, completed power reception on March 27, 2026.

This project marks HOBE ENERGY's first achievement with its proprietary grid-scale battery storage system, demonstrating for the first time the operation of its 5ft compact ESS in a real commercial environment.

---

■ Grid-Scale Battery Storage, Indispensable in the Renewable Energy Era, Plays an Expanding Role in Supporting Power Infrastructure

With the expanding adoption of renewable energy, managing output fluctuations caused by weather and time of day has become a critical challenge for Japan's power infrastructure. As the share of renewable energy increases, the development of grid-scale battery storage systems capable of storing surplus power and discharging it when needed is essential to maintain grid stability. Furthermore, energy security is a crucial national issue for Japan, requiring a shift from a highly import-dependent energy structure, the establishment of a decentralized energy foundation, and enhanced resilience in power supply.

Amidst these circumstances, government support for deep tech areas is also strengthening, further raising expectations for battery storage and energy management technologies. Grid-scale battery storage is gaining attention as a foundational technology for the next-generation power infrastructure, serving as a balancing force to support the widespread adoption of renewable energy. Against this backdrop of societal demand, HOBE ENERGY is working on developing social infrastructure for the renewable energy era by establishing a system that provides integrated services for battery storage system design, procurement, implementation, and operational support.

■ Significance for HOBE ENERGY: First Track Record for Grid-Scale Battery Storage System

HOBE ENERGY has accumulated a track record in the design and implementation of industrial and residential battery storage systems. The Kaminara Battery Storage Plant is the first project where the company provided end-to-end solutions, from battery system design and supply to EMS (Energy Management System) implementation and operational support, in the new domain of grid-scale battery storage plants designed for direct connection to the power grid. Led by Representative Director Kyoichi Okino, an engineer from Fuji Electric and ABB, HOBE ENERGY's management pillars are the development and utilization of domestic technology and contributions to energy security, and this project marks the first step in that strategy.

■ Installation Overview

・Battery Storage Plant Name: Saitama Kaminara Battery Storage Plant

・Location: Kaminara, Kumagaya City, Saitama Prefecture

・Capacity: 5MWh (Output 2MW)

・Power Reception Date: March 27, 2026

・Battery Storage System: HOBE ENERGY's 5ft Compact Battery Storage System (LFP)

・EMS: HOBE ENERGY's Proprietary EMS (Supports supply-demand adjustment market, real-time control)

・Construction Partner: E-TOP Co., Ltd.

・Aggregator: RUTILEA Co., Ltd.

・Battery Storage Plant Development: Japan Energy Storage Development Institute Co., Ltd. (JESDI)

■ HOBE ENERGY's Technical Features

The technical core of this battery storage plant lies in HOBE ENERGY's proprietary EMS (Energy Management System). Beyond just controlling battery charging and discharging, it also addresses the supply-demand adjustment market and renewable energy output fluctuations...