International Battery Substation (IBSS)
Battery storage project in Anchorage, Alaska. 40 MW of nameplate capacity across 1 generator, operated by Chugach Electric Assn Inc.
Also known as EIA plant 68611
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 40 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- October 2024First generator online
- Operator
- Chugach Electric Assn IncEIA operator ID 3522
- Grid
- CEABalancing authority CEA
- Price nodes
- None linkedNo verified ISO node
- Location
- Anchorage, AK61.1699, −149.9131
- EIA plant ID
- 68611EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power International Battery Substation (IBSS) produces
Free · EIA-923Net generation, 2025
−2.50 GWh
−2,500 MWh, final. 10 of 12 months reported
Battery discharge, 2025
17 MWh
Charge 2.52 GWh
January to July 2026
−1.76 GWh
Provisional
| 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 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | Not reported | Not reported | 0 of 12 |
| 2025 | −2,500 | Not reported | 10 of 12 |
| 2026 (provisional, partial year) | −1,762 | 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 |
|---|---|---|---|
| IBSS | Batteries | 40.0 | October 2024 |
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 Chugach Electric Assn Inc 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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Power plants near International Battery Substation (IBSS)
More plants operated by Chugach Electric Assn Inc
Questions about International Battery Substation (IBSS)
How much power does International Battery Substation (IBSS) produce?
International Battery Substation (IBSS) reported −2,500 MWh (−2.50 GWh) of net generation in 2025. From January to July 2026 it reported −1.76 GWh, which is provisional. 10 of 12 months were reported for 2025.
Where is International Battery Substation (IBSS)?
International Battery Substation (IBSS) is in Anchorage, Alaska, at 61.1699, −149.9131. It is in the Chugach Electric Assn Inc balancing area (CEA).
Who operates International Battery Substation (IBSS)?
EIA-860M for August 2026 lists Chugach Electric Assn Inc as the operator (EIA operator ID 3522). The operator is not always the owner.
When did International Battery Substation (IBSS) start operating?
Its first generator began operating in October 2024, 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page