Estimated: Mystic generating-station area, Everett/Boston, Massachusetts; approximate POI context, exact Singleton parcel unverifiedJupiter Power LLC
CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins95% CONFIDENCEOverall confidence: 95%How well the pin's source and references back up its dates.Weighted average of how firmly 1 reference, the source included, supports the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The confirmed event is the August 29, 2023 ISO review letter. Its projected May 2026 service date is historical and not an actual opening.[1]ISO New England’s August 29, 2023 letter identifies Jupiter’s QP1143 Singleton battery proposal at Mystic as 500 MW / 2,000 MWh and records no significant adverse effect under its review. This historical study is not evidence the plant is operating.
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