PowerX Receives Grid-Scale BESS Order for ENEOS Power’s Extra-High Voltage Storage Project

TOKYO, JAPAN --- PowerX, Inc. (Head Office: Tamano City, Okayama Prefecture; Director, President and CEO: Masahiro Ito; Securities Code: 485A) has received an order from Daiwa Energy Co., Ltd. for 40 units of its "Mega Power 2700A" grid-scale battery energy storage system (BESS), totaling 109.7 MWh in capacity. The systems will be installed at an extra-high voltage battery storage project that ENEOS Power Corporation (Head Office: Minato City, Tokyo; Representative Director and President: Yasushi Onoda) is developing in Shizuoka City, Shizuoka Prefecture.

The new facility will be built on the grounds of the ENEOS Group’s Shimizu Oil Terminal and is scheduled to commence operation in FY 2028. By charging and discharging electricity in connection with the power grid in the Chubu area, the facility will help stabilize the balance of electricity supply and demand and support the further expansion of renewable energy in the area.

PowerX will continue to contribute to the stabilization of the power grid during the phase of renewable energy expansion through the supply of BESS developed and manufactured in Japan.

Details of the order are as follows.

1. Products Ordered

PowerX “Mega Power 2700A” grid-scale BESS: 40 units in total

2. Installation Site and Order Details

• Location: Shimizu Ward, Shizuoka City, Shizuoka Prefecture

• Number of battery containers: 40 units

• Total storage capacity (nominal): 109.7 MWh (equivalent to the daily electricity consumption of approximately 10,300 average Japanese households)

• PCS output: 50 MW

• Construction start: January 2027 (planned)

• Commencement of operation: Within FY 2028 (planned)

• Project operator: ENEOS Power Corporation

• EPC (engineering, procurement, and construction): Daiwa Energy Co., Ltd.

3. About the “Mega Power 2700A” Grid-Scale BESS

• Size: 20-foot container (ISO standard)

• Battery type: Lithium Iron Phosphate (LFP)

• Storage capacity (per unit): 2,742 kWh (nominal) / 2,468 kWh (rated)

• Place of production: Tamano City, Okayama Prefecture, Japan

<sup>* The revenue associated with this project is included in the Signed Orders for FY 2027 presented in the financial results briefing materials disclosed on August 14, 2026. This press release is issued once agreement on public disclosure has been reached with the customer, and its timing does not necessarily coincide with the necessity or timing 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.</sup>