PowerX Receives BESS Order for Machiokoshi Energy’s Extra-High Voltage Battery Farm in Hokkaido

TOKYO, JAPAN --- PowerX, Inc. (Head Office: Tamano City, Okayama Prefecture; Director, President and CEO: Masahiro Ito; Securities Code: 485A) has received an order for 102 units of its “Mega Power 2500” grid-scale battery energy storage system (BESS), totaling 255.7 MWh in capacity. The systems are for a new extra-high voltage battery farm being developed in Hokkaido by an affiliated company of Machiokoshi Energy Co., Ltd. (Head Office: Kakogawa City, Hyogo Prefecture; President: Shoji Numata).

The new battery farm will connect to the power grid in the Hokkaido area and help stabilize the power supply-demand balance through charging and discharging. The facility is expected to support the further expansion of renewable energy in Hokkaido, a region with high potential for renewable energy deployment.

This project has been selected to receive a subsidy from the Ministry of Economy, Trade and Industry (METI) under the “FY 2025 Subsidy Program for Supporting the Introduction of Energy Storage Systems to Promote the Adoption of Renewable Energy.”

PowerX will continue to contribute to the realization of carbon neutrality in Japan by supplying domestically developed and manufactured battery storage systems.

1. System Ordered

A total of 102 units of PowerX’s “Mega Power 2500” Grid-Scale BESS

2. About the Battery Farm Deploying PowerX's Systems

• Location: Hokkaido area

• Number of Battery Containers: 102 units
  Storage Capacity (Nominal): 255.7 MWh (equivalent to the daily electricity consumption of approximately 23,900 average Japanese households)

• PCS Output: 50.3 MW

• Commercial Operation Start Date: FY 2029 (scheduled)

3. “Mega Power 2500” Specifications

• Size: 10-foot container (ISO standard)

• Battery Type: Lithium Iron Phosphate (LFP)

• Storage Capacity: Nominal Capacity 2,507 kWh / Rated Capacity 2,256 kWh (per unit)

• Place of Production: Tamano City, Okayama Prefecture / Tomakomai City, Hokkaido, Japan

^{* Revenue from this project is included in the order pipeline for FY 2027, as disclosed in the financial results presentation materials released on May 14, 2026. The timing of press releases is determined by mutual agreement with customers and does not necessarily correspond to the timing or requirements of timely disclosure.
This document has been translated from the Japanese original for reference purposes only. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.}