Outer Cape Community Battery
Battery storage project in Barnstable County, Massachusetts. 25 MW of nameplate capacity across 1 generator, operated by Eversource.
Also known as Outer Cape Battery Energy Storage System · EIA plant 62604
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 25 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2022First generator online
- Operator
- EversourceEIA operator ID 59497
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- None linkedNo verified ISO node
- Location
- Barnstable County, MA42.0603, −70.1942
- EIA plant ID
- 62604EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Outer Cape Community Battery produces
Free · EIA-923Net generation, 2025
−60 MWh
−60 MWh, final
Battery discharge, 2025
738 MWh
Charge 798 MWh
January to July 2026
−48 MWh
Provisional
Range, 2023 to 2025
−60.0–−42.0
MWh a year. Low 2025, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | −78 | Not reported | 5 of 12 |
| 2023 | −42 | Not reported | 12 of 12 |
| 2024 | −59 | Not reported | 12 of 12 |
| 2025 | −60 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | −48 | Not reported | 7 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| OCESS | Batteries | 25.0 | December 2022 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Eversource as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Outer Cape Community Battery
How much power does Outer Cape Community Battery produce?
Outer Cape Community Battery reported −60 MWh (−60 MWh) of net generation in 2025. From January to July 2026 it reported −48 MWh, which is provisional.
Where is Outer Cape Community Battery?
Outer Cape Community Battery is in Barnstable County, Massachusetts, at 42.0603, −70.1942. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Outer Cape Community Battery?
EIA-860M for August 2026 lists Eversource as the operator (EIA operator ID 59497). The operator is not always the owner.
When did Outer Cape Community Battery start operating?
Its first generator began operating in December 2022, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page