- BESS
PowerX Completes Delivery of BESS for Its First Extra-High Voltage Battery Farm
2026.05.27
TOKYO, JAPAN — PowerX, Inc. (Head Office: Tamano City, Okayama Prefecture; Director, President and CEO: Masahiro Ito; Securities Code: 485A) has delivered 20 units of its “Mega Power 2700A” grid-scale battery energy storage system (BESS), totaling 54.84 MWh, to an extra-high voltage battery farm developed by Kamigumi Co., Ltd. (Head Office: Chuo-ku, Kobe City; Representative Director and President: Norihito Tahara) in Kasai City, Hyogo Prefecture. The battery farm was completed on May 27 as the first extra-high voltage battery farm* to use PowerX’s BESS.
The newly completed "Kasai Mega Power Battery Farm" operates on the Kansai area power grid, storing surplus electricity and releasing it when demand rises to help balance supply and demand. The facility is expected to further promote renewable energy adoption in the region.
This marks the first of multiple BESS deliveries to Kamigumi, with additional projects planned in Tokyo and Oita Prefecture as the partnership between the two companies continues to expand.
PowerX will continue to contribute to achieving carbon neutrality in Japan through the supply of domestically developed and manufactured BESS.
1. System Delivered
20 units of PowerX’s “Mega Power 2700A” Grid-Scale BESS
2. Installation Site
“Kasai Mega Power Battery Farm” (Sakae-machi, Kasai City, Hyogo Prefecture)
3. Battery Farm Overview
Number of BESS containers: 20
Nominal Capacity: 54.84 MWh (equivalent to the daily electricity consumption of approximately 5,100 average Japanese households)
PCS Output: 13 MW
Completion: May 27, 2026
Operator: Kamigumi Co., Ltd.
4. Grid-Scale BESS “Mega Power 2700A”
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
“The completion ceremony (May 27, 2026)”.
*“Extra-high voltage” is defined under Japan’s Ministerial Ordinance on Technical Standards for Electrical Facilities as voltage exceeding 7,000 V. This is the first grid-connected battery farm operating at this voltage class to use PowerX’s BESS.
Revenue from the projects described in this press release was recorded in the fiscal year ended December 2025. 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.