Announced details
Electricity supply and demand balancing, avoidance of renewable energy output curtailment, frequency regulation capacity, and local consumption of renewable electricity
西日本プラント工業株式会社 is the EPC contractor and maintenance company. 宗像アスティ太陽光発電株式会社 operates a solar power generation business, and eREX will purchase electricity from its power plant. eREX will operate and control the battery storage system as both the battery storage operator and aggregator.
西日本プラント工業株式会社: 1-10-1 Takasago, Chuo-ku, Fukuoka, Fukuoka Prefecture; established in May 1954; capital of ¥150 million; Representative Director and President Toyoshima Naoyuki (豊嶋 直幸). The company designs, constructs and performs maintenance and repair work on various plants and power stations, and provides operations services. 宗像アスティ太陽光発電株式会社: 2-1 Asty, Munakata, Fukuoka Prefecture; Representative Director and President Kamakura Toshiyuki (鎌倉 利之); a wholly owned subsidiary of 西日本プラント工業株式会社; operates a solar power generation business.
Munakata, Fukuoka Prefecture (planned battery storage site)
Renewable electricity will be purchased at a price equivalent to the FIT rate. The battery will be charged during periods of low market prices and discharged during periods of high market prices. Specific prices and fee structures: Not disclosed.
The company does not address Contract Value / Impact on Business Performance.
The Seventh Strategic Energy Plan; supplementary materials for the first half of the fiscal year ending March 2026 results; and eREX press releases on its previous aggregation business initiatives
| Item | Details |
|---|---|
| Names of Products / Services Covered | Solar-plus-storage battery system / aggregation business |
| Counterparty | 西日本プラント工業株式会社, 宗像アスティ太陽光発電株式会社, JEPX |
| Counterparty overview | 西日本プラント工業株式会社: 1-10-1 Takasago, Chuo-ku, Fukuoka, Fukuoka Prefecture; established in May 1954; capital of ¥150 million; Representative Director and President Toyoshima Naoyuki (豊嶋 直幸). The company designs, constructs and performs maintenance and repair work on various plants and power stations, and provides operations services. 宗像アスティ太陽光発電株式会社: 2-1 Asty, Munakata, Fukuoka Prefecture; Representative Director and President Kamakura Toshiyuki (鎌倉 利之); a wholly owned subsidiary of 西日本プラント工業株式会社; operates a solar power generation business. |
| Relationship with the Company | 西日本プラント工業株式会社 is the EPC contractor and maintenance company. 宗像アスティ太陽光発電株式会社 operates a solar power generation business, and eREX will purchase electricity from its power plant. eREX will operate and control the battery storage system as both the battery storage operator and aggregator. |
| Offering price | Renewable electricity will be purchased at a price equivalent to the FIT rate. The battery will be charged during periods of low market prices and discharged during periods of high market prices. Specific prices and fee structures: Not disclosed. |
| Contract Date | 30 March 2026 (the date the related strategy was announced). The investment decision was made on 31 March 2026. |
| Launch date | First half of fiscal 2027 (operations scheduled to begin) |
| Applicable area | Electricity supply and demand balancing, avoidance of renewable energy output curtailment, frequency regulation capacity, and local consumption of renewable electricity |
| Location | Munakata, Fukuoka Prefecture (planned battery storage site) |
| Location scale | Rated output of 1,980 kW and rated capacity of 8,1467 kWh (as stated in the text) |
| Source | The Seventh Strategic Energy Plan; supplementary materials for the first half of the fiscal year ending March 2026 results; and eREX press releases on its previous aggregation business initiatives |
Items this document does not state (7)
These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.
The reasons the company gives
The company's own explanation, not something inferred from the numbers.To expand the adoption of renewable energy, stabilize electricity supply and demand, avoid output curtailment, make effective use of renewable electricity, expand the aggregation business, and enhance the value of battery storage facilities.