⚡ Energy

Railbelt Battery Storage & Fire Island Wind Integration

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.

Live 📅 since 2024

🤖 AI-generated summary of the sources below — how this works · 🔎 Last verified 2026-08-02

⚡ Energy Smart grid & energy

📊 Impact

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.

Evidence🏛️ Official

Scale🗺️ Regional

Cost$65M

📖 Terms in this entry: Fuel cell · Lighthouse project · Microgrid

Sources

↗ Chugach Electric — Fire Island Wind (operator)Confirms Fire Island Wind's 17.6MW capacity and ~3% of retail load, current page.

↗ Chugach Electric — BESS officially commissioned (operator)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)Independent trade coverage of the October 2024 commissioning.

This overview was generated with AI from the public sources listed above 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.

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Compare this project

🇸🇴 Kismayo Solar-Diesel Mini-Grid for Refugee Returnees · Kismayo Both are small solar-hybrid microgrids serving a defined population rather than a whole city's grid. 🇺🇸 Austin Energy SHINES: Solar-Storage Grid Management Pilot · Austin Austin's SHINES pilot proved the DERMS software; Anchorage's 2024 Megapack shows the same solar-plus-battery idea at grid scale. 🇮🇳 Mumbai Power Grid Islanding Scheme · Mumbai Both keep a city grid stable when the wider network falters: Mumbai's 1981 relay islanding, Anchorage's 2024 battery backup instead. 🇯🇵 Fujisawa Sustainable Smart Town · Fujisawa Both pair batteries with renewables at opposite scales: Fujisawa's are per-home; Anchorage's Megapack backs up the whole city grid.

Explore the wider context

🔌 Smart grid & energy guide 🏙️ Anchorage city profile ⚡ Energy projects

📎 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 2026-08-02). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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