PowerX Receives Additional BESS Order from Sanei Sangyo

TOKYO, JAPAN --- PowerX, Inc. (Head Office: Tamano City, Okayama Prefecture; Director, President and CEO: Masahiro Ito; Securities Code: 485A) has received an order from Sanei Sangyo Co., Ltd. (Head Office: Kan-onji City, Kagawa Prefecture; Representative Director: Eiji Nita) for a total of 12 units of its "Mega Power 2700A" grid-scale battery energy storage system (BESS), totaling 32.9 MWh in capacity, for four battery farms being developed in the Chugoku, Shikoku, and Kyushu regions of western Japan.

The battery energy storage systems ordered will be installed at four sites — Tamano City, Okayama Prefecture; Fukuyama City, Hiroshima Prefecture; Mitoyo City, Kagawa Prefecture; and Arao City, Kumamoto Prefecture — and, following various tests, are scheduled to commence operation in stages from summer 2026. This marks the first time PowerX's battery energy storage systems have been adopted for a project located in Tamano City, Okayama Prefecture, where the company's manufacturing base is situated.

PowerX has previously received orders from Sanei Sangyo for projects in the Tokyo and Kyushu areas, and with this latest order the number of adopted sites has expanded to eight. The two companies continue to deepen their collaboration toward the start of operations. At the "Ueki-machi Battery Farm" (Kumamoto City, Kumamoto Prefecture) — the first project for Sanei Sangyo — PowerX has already completed delivery of its battery energy storage system, and full-scale operation in the balancing market is scheduled to begin shortly.

Through the provision of battery energy storage systems developed and manufactured in Japan, PowerX will continue to contribute to the stabilization of the power grid during this phase of expanding renewable energy.

"Ueki-machi Battery Farm" (Kumamoto City, Kumamoto Prefecture)

Details of this order are as follows.

1. System Ordered

A total of 12 units of PowerX's "Mega Power 2700A" Grid-Scale BESS

2. Installation Sites and Order Details

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 2026 presented in the financial results briefing materials disclosed on May 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>