2026-10-14日本経済新聞
Marubeni New Power and Sun Village complete entry of grid-scale batteries into the balancing market
丸紅新電力とサンヴィレッジ、系統用蓄電池の需給調整市場への参入を完了
Marubeni New Power and Sun Village announced that all four grid-scale battery projects first announced in October 2025 completed entry into Japan's balancing market (需給調整市場) in September 2026. The projects, developed and owned by Sun Village in Tochigi and Saitama prefectures, are operated by Marubeni New Power as aggregator. Capacities of the four projects are not stated in the text.
- operating
- 栃木県足利市、埼玉県本庄市、埼玉県大里郡寄居町
- 丸紅新電力
- サンヴィレッジ
- 丸紅
Full account
- Press release dated 2026年10月13日 (October 13, 2026).
- Concerns four grid-scale battery projects announced in a press release dated October 17, 2025; all four completed entry into the balancing market in September 2026.
- Projects developed and owned by Sun Village (株式会社サンヴィレッジ): 2 projects in Ashikaga City, Tochigi and Honjo City, Saitama, plus Yorii Town, Osato District, Saitama — four in total (text's enumeration as written).
- Marubeni New Power (丸紅新電力) acts as aggregator, handling market bidding and operation.
- Entry required connecting to the general transmission/distribution operator's dispatch system and passing response-performance qualification; all four passed and have begun actual supply-demand operation.
- Background: growing renewables require balancing capacity; batteries charge/discharge flexibly to stabilize the grid.
- Marubeni New Power: 20+ years of electricity retail; since October 2024 operates the Ina storage station (伊那蓄電所) owned by Marubeni Corporation (丸紅株式会社), with extensive balancing-market track record; battery operation contracts total 179MW.
- Will combine bids in the wholesale market, balancing market and capacity market to ensure stable operation and maximize revenue.
- The two firms promote a 'full-package' grid battery offering for third parties: Sun Village provides land and grid rights, EPC and O&M; Marubeni New Power handles commissioning, coordination with transmission operators and aggregation.
- Project-level MW/MWh not given.
日本語で読む
丸紅新電力とサンヴィレッジ、系統用蓄電池の需給調整市場への参入を完了
- 発表日：2026年10月13日。
- 2025年10月17日付プレスリリースで発表した系統用蓄電池4案件が、2026年9月にすべて需給調整市場への参入を完了。
- 対象：サンヴィレッジが開発・保有する栃木県足利市、埼玉県本庄市の2案件、および埼玉県大里郡寄居町の計4案件（原文の記載どおり）。
- 丸紅新電力がアグリゲーターとして電力市場への入札・運用を担当。
- 参入には一般送配電事業者の指令システムとの接続や応動性能の審査合格が必要で、4案件すべて合格し実需給を開始。
- 背景：再エネ拡大に伴う調整力確保の重要性。蓄電池は機動的な充放電で系統安定に貢献。
- 丸紅新電力は20年以上の小売電気事業の実績、2024年10月より丸紅株式会社保有の伊那蓄電所で運用を開始。蓄電池運用業務の受注は179MW。
- 卸電力市場、需給調整市場、容量市場への入札を組み合わせ、安定稼働と収益最大化を図る。
- 第三者向け「系統用蓄電池のフルパッケージ商品」を推進：サンヴィレッジが土地・系統権利、EPC、O&M、丸紅新電力が試運転対応、一般送配電事業者との調整、アグリゲーションを担当。
- 各案件の出力・容量は記載なし。
Attached to: 本庄市・サンヴィレッジ・8MWh系統用蓄電所（仮称） →