Power plantPower & energy

Keiyo Gas launches 2 MW/8 MWh grid-scale battery storage facility in Isesaki

Keiyo Gas Co., Ltd.Isesaki, GunmaPublished Oct 6, 2026

InvestmentNot disclosed

PhaseCompleted

Start—

CompletionOct 2026

To completion

Today

Completed.

Keiyo Gas opened its first domestic grid-scale battery storage facility in Isesaki, Gunma, beginning full-scale operation on October 1, 2026. The 2 MW, 8 MWh high-voltage facility is operated by KG BESS LLC and was developed and constructed by Sun Village; Marubeni New Power handles market transactions as aggregator.

Project facts

Owner: Keiyo Gas Co., Ltd.
Listing: 9539 Tokyo
Facility: Power plant
Sector: Power & energy
Location: Isesaki, Gunma, Japan
Investment: Not disclosed
Scale / capacity: 2 MW output; 8 MWh storage capacity
Contractor: Sun Village Co., Ltd.
Completion: Oct 2026
Announced: Oct 5, 2026
Themes: power-grid, renewable-energy

Figures and schedules are as announced by the company or the public body concerned; plans can change. Amounts that were not disclosed are recorded as not disclosed, never estimated.

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