2026-10-14日本経済新聞

Marubeni Shin-Denryoku 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 Shin-Denryoku 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 are developed and owned by Sun Village in Tochigi and Saitama prefectures, with Marubeni Shin-Denryoku acting as aggregator for market bidding and operation.

  • 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 13 October 2026 (Nikkei release).
  • Four grid-scale battery projects announced in a 17 October 2025 press release all completed entry into the balancing market in September 2026.
  • Projects developed and owned by Sun Village: two projects in Ashikaga City, Tochigi, and Honjo City, Saitama, plus Yorii Town, Osato District, Saitama — four in total (as stated).
  • Marubeni Shin-Denryoku acts as aggregator, handling market bidding and operation.
  • Entry required passing prescribed reviews on connection to the general transmission/distribution operator's dispatch system and response performance; all four passed and have begun actual supply-demand operation.
  • Marubeni Shin-Denryoku: over 20 years of electricity retail; has operated Marubeni Corporation's Ina battery station (伊那蓄電所) since October 2024 with balancing market track record; battery operation contracts total 179MW.
  • Will combine bidding in wholesale, balancing and capacity markets to secure stable operation and maximize revenue.
  • The companies offer third parties a 'full-package' grid battery product: Sun Village provides land and grid rights, EPC and O&M; Marubeni Shin-Denryoku handles commissioning, coordination with grid operators and aggregation.
  • Individual project capacities (MW/MWh) are 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（プレスリリース）。
  • 2025年10月17日付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。
  • 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・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。
  • 丸紅新電力は20年以上の小売電気事業の実績を持ち、2024年10月より丸紅株式会社保有の伊那蓄電所の運用を開始。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。
  • 「系統用蓄電池のフルパッケージ商品」を第三者向けに推進：サンヴィレッジが土地・系統権利、EPC、O&Mを、丸紅新電力が試運転対応、一般送配電事業者との調整、アグリゲーション業務を提供。
  • 各案件の出力・容量は記載なし。

Attached to: 寄居町の系統用蓄電池 →