PowerX and MIRARTH Asset Management Commence Operations of Grid-Scale Battery Farm in Kanagawa

TOKYO, JAPAN — PowerX, Inc. (Head Office: Tamano City, Okayama; President & CEO: Masahiro Ito, hereafter PowerX) and MIRARTH Asset Management Inc. (Head Office: Chiyoda City, Tokyo; President and CEO: Takehiko Kusashima, hereafter MAM) have commenced commercial operations of a grid-scale battery farm in Aikawa Town, Kanagawa Prefecture, effective September 1, 2025.

This project is the first instance of PowerX’s Power Business Division operating the company's own “Mega Power 2700A” battery energy storage system through its electricity aggregation service.

The newly launched "MSB Kanagawa Aikawa Battery Farm" is the first battery energy storage system owned by the MIRARTH Holdings Group. The system’s balancing capacity is utilized to serve PowerX’s retail electricity business, including its "X-PPA" corporate renewable energy service, as well as transactions on the Japan Electric Power Exchange (JEPX), the Balancing Market(EPRX), and the capacity market.

The project adopts PowerX’s proprietary “Battery Farm Tolling” scheme, based on a lease agreement between PowerX and MAM. Under this scheme, PowerX pays a fixed fee for balancing capacity, enabling the MSB Kanagawa Aikawa Battery Farm to secure stable, predictable cash flows from fixed income.

PowerX and MAM will continue to work together to advance the development of grid-scale battery farm, further contributing to regional grid stability amid the ongoing expansion of renewable energy.

^{PowerX, Inc. is a registered retail electricity provider and specified wholesale electricity provider under the Electricity Business Act.}

Overview of the Battery Farm Operated by PowerX

• Name: MSB Kanagawa Aikawa Battery Farm

• Location: Aikawa Town, Kanagawa Prefecture

• Facility Owner: MIRARTH Asset Management Inc.

• Storage Capacity (Rated): 7.4 MWh (three units of PowerX’s “Mega Power 2700A”)

• PCS Output: 1.99 MW

• Commercial Operation Start Date: September 1, 2025

About MIRARTH Asset Management

• Company Name: MIRARTH Asset Management Inc.

• Established: October 28, 2013

• Representative: President and CEO: Takehiko Kusajima

• Address: Taisei Otemachi Building 18F, 2-1-1 Otemachi, Chiyoda-ku, Tokyo

• URL: https://mirarth-am.co.jp/

Case Study : MSB Kanagawa Aikawa Battery Farm