Stephentown Spindle

Stephentown Spindle is a 20 MW flywheel facility in Stephentown, New York. Its 20 one-megawatt pods contain 200 flywheels and serve NYISO frequency regulation; Stephentown Spindle LLC owns the project and Convergent Energy + Power operates it. Convergent reports 5 MWh for the facility, while EIA's June 2026 inventory reports 15 MWh.

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

Common questions about Stephentown Spindle

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.