PowerX Receives Order for Grid-Scale Battery Storage System for Kamigumi's Extra-High Voltage Storage Plant
PowerX Inc. has received an order from Kamigumi Co., Ltd. for 36 units of its "Mega Power 2500" grid-scale battery storage system (81.2 MWh total capacity) for a new extra-high voltage storage plant in Oita City, Oita Prefecture. Scheduled to begin operation in 2029, this system will contribute to stabilizing the power supply and demand balance in Kyushu.
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- 📰 Published: May 12, 2026 at 23:00
- 🔍 Collected: May 12, 2026 at 14:31
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PowerX Inc. (Headquarters: Tamano City, Okayama Prefecture; Representative Director, President and CEO: Masahiro Ito; Securities Code: 485A) has received an order from Kamigumi Co., Ltd. (Head Office: Chuo-ku, Kobe City; Representative Director and President: Norihito Tahara) for 36 units of its grid-scale battery storage system "Mega Power 2500" (total storage capacity: 81.2 MWh) for a new extra-high voltage battery storage plant to be constructed in Oita City, Oita Prefecture.
The newly established "Kamigumi Hiyoshihara Battery Storage Plant (tentative name)" is scheduled to commence operation in 2029. While the Kyushu area is seeing progress in the introduction of renewable energy sources, it is also significantly affected by output curtailment. This battery storage plant is expected to contribute to stabilizing the power supply and demand balance by connecting to the power grid and performing charging and discharging.
Furthermore, this project has been selected for the Ministry of Economy, Trade and Industry's FY2025 "Subsidy for Business to Promote Introduction of Renewable Energy and Power Storage Systems such as Grid-Connected Batteries."
This order for a battery storage system from Kamigumi marks the third location, following an extra-high voltage battery storage plant currently under construction in Kasai City, Hyogo Prefecture, and a high-voltage battery storage plant in Koto-ku, Tokyo. This large-scale project in Kyushu will further expand the collaboration between the two companies.
PowerX will continue to contribute to the realization of carbon neutrality in Japan by providing battery storage systems developed and manufactured domestically.
The details of this order are as follows:
1. Ordered Product
PowerX's grid-scale battery storage system "Mega Power 2500", total 36 units
2. Installation Site and Order Details
Site Name: "Kamigumi Hiyoshihara Battery Storage Plant (tentative name)"
Location: Hiyoshihara, Oita City, Oita Prefecture
Number of battery containers: 36 units
Rated storage capacity: 81.2 MWh (equivalent to one day's power consumption for approximately 7,600 general households)
PCS output: 20 MW
Scheduled start of operation: March 2029 (planned)
Operator: Kamigumi Hiyoshihara Battery Storage Business LLC
3. About the grid-scale battery storage system "Mega Power 2500"
・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)
・Production location: Tamano City, Okayama Prefecture
*Sales related to this project are included in the projected orders for fiscal year 2027, as disclosed in the financial results briefing material on February 13, 2026. Please note that press releases are announced once an agreement for public disclosure with the customer is obtained, and do not necessarily coincide with the necessity and timing of timely disclosure.
The newly established "Kamigumi Hiyoshihara Battery Storage Plant (tentative name)" is scheduled to commence operation in 2029. While the Kyushu area is seeing progress in the introduction of renewable energy sources, it is also significantly affected by output curtailment. This battery storage plant is expected to contribute to stabilizing the power supply and demand balance by connecting to the power grid and performing charging and discharging.
Furthermore, this project has been selected for the Ministry of Economy, Trade and Industry's FY2025 "Subsidy for Business to Promote Introduction of Renewable Energy and Power Storage Systems such as Grid-Connected Batteries."
This order for a battery storage system from Kamigumi marks the third location, following an extra-high voltage battery storage plant currently under construction in Kasai City, Hyogo Prefecture, and a high-voltage battery storage plant in Koto-ku, Tokyo. This large-scale project in Kyushu will further expand the collaboration between the two companies.
PowerX will continue to contribute to the realization of carbon neutrality in Japan by providing battery storage systems developed and manufactured domestically.
The details of this order are as follows:
1. Ordered Product
PowerX's grid-scale battery storage system "Mega Power 2500", total 36 units
2. Installation Site and Order Details
Site Name: "Kamigumi Hiyoshihara Battery Storage Plant (tentative name)"
Location: Hiyoshihara, Oita City, Oita Prefecture
Number of battery containers: 36 units
Rated storage capacity: 81.2 MWh (equivalent to one day's power consumption for approximately 7,600 general households)
PCS output: 20 MW
Scheduled start of operation: March 2029 (planned)
Operator: Kamigumi Hiyoshihara Battery Storage Business LLC
3. About the grid-scale battery storage system "Mega Power 2500"
・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)
・Production location: Tamano City, Okayama Prefecture
*Sales related to this project are included in the projected orders for fiscal year 2027, as disclosed in the financial results briefing material on February 13, 2026. Please note that press releases are announced once an agreement for public disclosure with the customer is obtained, and do not necessarily coincide with the necessity and timing of timely disclosure.