Power plantPower & energy

Denki no Eki starts construction of 16 MW battery storage facility in Isahaya

Denki no EkiIsahaya, NagasakiPublished Oct 28, 2026

InvestmentNot disclosed

PhaseUnder construction

StartOct 2026

CompletionDec 2028

Construction

Today

202720282029

About 26 months to scheduled completion.

Denki no Eki, a joint venture backed by JR Kyushu and the Sumitomo Corporation Group, began preparatory construction of its third grid-scale battery storage facility in Isahaya, Nagasaki, in October 2026. The facility will use a former railway substation site and adjoining land, with 16 MW of rated output and 70 MWh of storage capacity; operations are planned for December 2028.

Project facts

Owner: Denki no Eki
Listing: 8053 Tokyo
Facility: Power plant
Sector: Power & energy
Location: Isahaya, Nagasaki, Japan
Investment: Not disclosed
Scale / capacity: 16 MW rated output; 70 MWh storage capacity
Construction start: Oct 2026
Completion: Dec 2028
Announced: Oct 28, 2026
Themes: renewable-energy, power-grid

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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