Railbelt Battery Storage & Fire Island Wind Integration
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
4 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.
How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page
✎ Corrected 27 Aug 2026 Publication date recorded for 3 sources. What changed →
The battery does not make power; it lets gas turbines stop idling as backup. Chugach projects the swap will cut Railbelt gas use by about 5% a year — a projection, not a measurement.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ Anchorage city profile · 🔌 Smart grid & energy guide · ⚡ Energy projects
Chugach Electric integrates the 11-turbine, 17.6MW Fire Island wind farm (running since 2012, about 3% of retail load) into Anchorage's Railbelt grid. Since October 2024 it also stabilizes that grid with a 40MW/80MWh Tesla Megapack battery system, co-owned with Matanuska Electric ($65M total), that replaces spinning-reserve gas generators as backup.
🎓 Lesson
Read what the battery replaces, not what it stores. Its job is spinning reserve: before it existed, gas turbines had to run part-loaded so that generation was available the instant something tripped, and burning fuel to stand ready is most of what a small isolated grid wastes. Eighty megawatt-hours is not much storage for a city; it is a great deal of standby. The saving is a projection by the utility that bought it, and no measured figure has been published since commissioning in October 2024. That is the number to come back for. It is also worth keeping the two assets apart: the wind farm has run since 2012 and supplies about 3% of retail load, so the battery is not there to make wind viable — it is there to make the grid cheaper to keep upright.
Sources
Show your work What this page rests on and what it can’t tell you · all 4 claims with their sources · the forensic record
Evidence Passport · public beta 4 addressable claims, 3 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.
Inspect the claims, one by one — verbatim text, sources and caveats for all 4
The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
clm-1ed7dfc9bd92bc3d
quantitative
Chugach Electric integrates the 11-turbine, 17.6MW Fire Island wind farm (running since 2012, about 3% of retail load) into Anchorage's Railbelt grid
Sources carrying this claim
clm-337bceed308ebd4d
quantitative
Since October 2024 it also stabilizes that grid with a 40MW/80MWh Tesla Megapack battery system, co-owned with Matanuska Electric ($65M total), that replaces spinning-reserve gas generators as backup
Sources carrying this claim
clm-4538c81bc6cc0cfb
quantitative
Chugach projects the battery system will cut Railbelt-area natural gas consumption by about 5% a year by holding spinning reserve instead of idling gas turbines for it
Sources carrying this claim
clm-89d244208110658b
quantitative
no measured figure has been published since commissioning in October 2024
Sources carrying this claim
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:82769c1ff761dbc0fbcd888f53c4dc7203dc71a047ed393338f030c3fcd97b19
- 4
- of 4 claims mapped
- 3
- source dossiers
- 2
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Chugach Electric Association (75%) and Matanuska Electric Association (25%)
- Actor types
- utility
- Funding model
- utility
- Funding description
- Not recorded
- Cost
- $65M
- Ownership
- Not recorded
- Decision rights
- Not recorded
- Exit conditions
- Not recorded
3 source dossiers
Chugach Electric — Fire Island Wind (operator)
- Stable source ID
src-e6629c316d878a43- Publisher
- Name not classified · chugachelectric.com
- Type / language
- web-page · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-27
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Confirms Fire Island Wind's 17.6MW capacity and ~3% of retail load, current page. The page states no publication date.
- Claims linked
Chugach Electric — BESS officially commissioned (operator)
- Stable source ID
src-d479bb44eb94ecc9- Publisher
- Name not classified · chugachelectric.com
- Type / language
- web-page · language not classified
- Published
- 2024-10-07
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-27
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Official press release: 40MW/2-hour BESS, $65M, 75/25 Chugach/MEA ownership, spinning-reserve replacement, projected 5% annual gas savings.
Energy-Storage.news — 80MWh Tesla Megapack BESS (trade)
- Stable source ID
src-4d4475e5baf8802f- Publisher
- Name not classified · energy-storage.news
- Type / language
- web-page · language not classified
- Published
- 2024-10-11
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-27
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Independent trade coverage of the October 2024 commissioning.
- Claims linked
Known limits of this passport
- Publisher names and source languages have not yet been classified; domains are recorded without guessing.
- Existing source notes are descriptive locators, not page- or paragraph-exact citations.
- A missing archive, publication date or content hash is shown as null rather than inferred.
- The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.
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📎 Cite this project
1001 Smart Cities (2026). “Railbelt Battery Storage & Fire Island Wind Integration” — Anchorage, United States. The Smart City Atlas. https://1001smartcities.org/projects/anchorage-smart-microgrid/ (last verified 2026-08-27). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.