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Battery Energy Storage Systems Tracker

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Track U.S. battery energy storage systems with project-level size, duration, inverters, point-of- interconnection, timelines, and more.

UPDATED *

February 6th, 2026

RECENT UPDATES

 

+65 Projects, 440 BESS projects tracked 

TOTALS

76.4 GW //
210.0 GWh

BESS -Jan 14

*Updated monthly

How We Help Energy Professionals

INVESTORSinvest

Find opportunities for new investment, identify new counterparties, and access new information that can be input into models or verify data from other sources.

UTILITIESplug

Better understand the regulatory status of proposed batteries, allow benchmarking of utility projects, and identify key supply chain trends.

Developersdatacenter

Identify siting opportunities, benchmark competitors, and understand interconnection timelines to accelerate project development.

Energy traders + Analystsenergy-trader

Track deployments and operational statuses that influence net load, congestion patterns, and arbitrage opportunities.

Data Methodology

Halcyon's BESS Tracker compiles information on newly proposed, in development, and under construction battery energy storage systems across the United States. The tracker was released in December 2025 with projects over 100 MW of capacity and began adding projects under 100 MW in January 2026. The Tracker consolidates key project details into a structured, research-ready dataset, drawing from state public utility commission (PUC) dockets and the U.S. Energy Information Administration (EIA) datasets.


Each project entry captures essential attributes such as docket numbers, project names, capacity, size, duration, technology type, operating year, point-of-interconnection substation and voltage, and developers. Where available, the dataset includes granular details such as battery manufacturer, cost figures, co-location specifics, and inverter make, model, and rating.

Halcyon's analysts use AI-assisted search to identify relevant filings, and each data point is validated by subject-matter experts. The result is a uniquely reliable resource for understanding the scale, timing, and characteristics of upcoming battery storage across the U.S. electricity landscape.

Halcyon will update the tracker on a monthly basis to incorporate new projects and update existing projects as information becomes available. We also continuously add new data and new data fields based on your feedback.

Battery Energy Storage System Data

(34 data points)

Field

Description
Project Name Name of the battery energy storage system project
EIA Utility The EIA-reported utility / developer of the BESS
EIA Utility ID Utility identifier used by EIA reporting sources
EIA Plant ID Plant identifier used by EIA reporting sources
EIA Generator ID Generator identifier used by EIA reporting sources
EIA State State where the project is located
EIA County County/Parish where the project is located
EIA Balancing Authority Code Relevant balancing authority
Docket Proceeding numbers for the applicable state Commission and/or FERC
Docket Profile Halcyon AI generated Docket Profiles
Technology Battery technology type
Capacity (MW) Maximum power that can be delivered at one point-in-time
Size (MWh) Total potential power stored in BESS
Duration Number of hours of continuous discharge of power
Announcement Date Earliest date with information on the project in Commission proceedings
Construction Start Date Expected date for construction to begin
Commercial Operation Date Expected date of commercial operation in Commission proceedings
COD Month Anticipated month of commercial operation
COD Year Anticipated year of commercial operation
Queue Number Unique identifier assigned to project by regional grid operator (ISO/RTO)
Project Status The project's current state, whether announced, in development, in construction, recently operating, or withdrawn
Study and Permit Status The latest permitting status, such as feasibility study, interconnection requested, or interconnection agreement executed
LGIA (NEW) The latest Large Generator Interconnection Agreement for the project
SGIA (NEW) The latest Standard Generator Interconnection Agreement for the project
EWG (NEW) The latest Exempt Wholesale Generator filing for the project
CPCN (NEW) The latest Certificate of Public Convenience and Necessity for the project
Inverter Size (kW) Cumulative inverter size or power rating in kilowatts
Inverter Details Details such as the make and model, number of units, and per unit rating
Inverter Make The supplier of the inverter
Inverter Model Specific model of the inverter
# Units Number of units of the inverter for the project
Battery Manufacturer The company that produces the battery cells, modules, or other major hardware components used in the project
Co-Located Generation Whether the BESS is co-located, paired, or hybridized with another generation facility (e.g., solar, wind, natural gas)
Co-Located Generation Details Details such as the solar project name, capacity, shared interconnection, or a description of the co-located arrangement, if applicable
Point of Interconnection The substation, bus, or transmission node where the BESS connects to the electric grid
Substation Name of the POI substation
Voltage Kilovolts of the POI substation
Location Details Street address, city, or other details about the project location, if available
Latitude Distance north or south of the equator in degrees
Longitude Distance east or west of the prime meridian in degrees
Google Maps Link to the latitude and longitude in Google Maps
Developers The companies responsible for developing, owning, or leading the construction of the project through its phases
Capital Expenditure Anticipated upfront cost to build the project
Cost ($/kWh) Cost normalized to the system's energy capacity per kilowatt hour
Cost ($/kW) Cost normalized to the system's energy capacity per kilowatt
Cost Details Details around costs, such as regarding construction, battery stack, and more
EIA Capacity (MW) Maximum power that can be delivered at one point-in-time reported by the EIA
EIA Size (MWh) Total potential power stored in BESS reported by the EIA
EIA Anticipated Month  Anticipated month of commercial operation reported by the EIA
EIA Anticipated Year Anticipated year of commercial operation reported by the EIA

Data Preview

Project Name EIA Utility EIA Utility ID EIA Plant ID EIA Generator ID EIA State EIA County EIA BA Code EIA Anticipated Month EIA Anticipated Year Docket 1 Docket Profile 1 Docket 2 Docket Profile 2 Technology Capacity (MW) Size (MWh) Duration (Hours) Citation Announcement Date Construction Start Date Commercial Operation Date COD Month COD Year COD Citation Queue Number Project Status Study and Permit Status Status Citation Inverter Size (kW) Inverter Details Inverter Make Inverter Model # Units Battery Manufacturer Inverter Citation Co-Located Generation Co-Located Generation Details Point of Interconnection Substation Voltage Location Details Latitude Longitude Google Maps Substation Citation Developers Capital Expenditure Cost ($/kWh) Cost ($/kW) Cost Details Cost Citation EIA Capacity (MW) EIA Size (MWh)
Boise Bench BESS Idaho Power 9191 68799 BOBS ID Ada IPCO Jun 2026 IPC-E-24-16 https://app.halcyon.io/processes/8a88e3d3-a7db-4328-b03b-785fcfe9fbaf IPC-E-25-23 https://app.halcyon.io/processes/9e3a99b2-dbbc-46cb-afc3-a0c350d220b6 Flow 200 800 4 https://app.halcyon.io/documents/21b634d5-f626-4db9-88fa-b1f8feb1a4d2/attachment?page=19 Apr 3, 2024 Anticipated mid 2025 Jun 1, 2026 6 2026 https://app.halcyon.io/documents/3e454171-2f53-47fb-a961-b7ca13941025/attachment?page=1   In Development Interconnection Requested https://app.halcyon.io/entities/21b634d5-f626-4db9-88fa-b1f8feb1a4d2?page=18               False   Boise Bench Substation Boise Bench Substation     43.5575 -116.1548 https://maps.google.com/?q=43.55751,%20-116.1548   - Idaho Power Company

- Savion: previously proposed third-party developer whose project was canceled

- Company-developed alternatives were chosen after third-party projects failed		       The Company estimated the 50 MW Hemingway Incremental Project would cost with $1.5 million in Operations and Maintenance (O&M) costs for during the first-year, rising to $2 million annually thereafter. https://app.halcyon.io/documents/73648d63-18d4-42cb-86dd-1c3b2496d8d2/attachment?page=4 150 600
Flint Grid ESS Flint 67157 68911 27288 OH Franklin PJM Jul 2027 21-1061-EL-BGN https://app.halcyon.io/processes/d915d0ab-5873-4dd5-9c96-bf667652fe1a ER25-2976-000 https://app.halcyon.io/processes/f500cd6a-5989-4070-b6d5-18a30e05a9fa Lithium-ion 200 800 4 https://app.halcyon.io/documents/d9b6f096-2fa3-450e-b909-76a9646ab752/attachment?page=7 Oct 18, 2021 Feb 26, 2025 TBD     https://app.halcyon.io/documents/2c7392fd-5e0e-4572-8077-e470039413e1/attachment?page=1   In Construction Under Construction https://app.halcyon.io/documents/48e9192d-c6ce-48ae-9a5f-df50f600f82f/attachment?page=1 202,283 73 x 2.771 MW Power Electronics FP3150K inverters, 73 x 3.465 MVA inverter step-up transformers and batteries supporting 200 MWE. Power Electronics FP3150K inverters 73 360 BYD Cube Pro containers, each of which will contain 24 - 116 kWh rated batteries https://app.halcyon.io/documents/0f7a0fd5-c434-4b2d-805b-721c3a526d26/attachment?page=97 False A standalone battery storage facility consisting of inverters and associated medium voltage transformers that step up using a single main power transformer to grid voltage of 138kV on the high side. AEP Ohio Jug Street Substation 138 kV Jug Street Substation 138 13713 Jug Street Road, New Albany, OH 40.0964 -82.7336 https://maps.google.com/?q=40.09639,%20-82.73361 https://app.halcyon.io/documents/8266083e-18f4-40f9-a5f1-29e54d05b129/attachment?page=4 - Flint Grid, LLC: developer and operator           200 1000
Skeleton Creek Energy Center Hybrid Skeleton Creek Energy Center 62023 62494 SCBAT OK Garfield SWPP Dec 2025 2024-000012 https://app.halcyon.io/processes/dde429f8-a231-4726-a828-5d98e1d61dec ER25-3459-000 https://app.halcyon.io/processes/98967925-2e16-474f-9b71-ca5cbf6bbcfb Lithium-ion 252 800 4 https://app.halcyon.io/documents/c64c1534-6424-43dc-8360-a16c9ccdb3e2/attachment?page=2 Mar 12, 2024   Jun 1, 2025 6 2025 https://app.halcyon.io/documents/7791727a-0ac8-46b9-b1e7-99506acc8e19/attachment?page=193   In Construction Interconnection Agreement Executed https://app.halcyon.io/documents/4c7f5be1-71f7-4d8c-9764-ddf221f6ef3b/attachment?page=1 202,193 59 PE FP4200M BESS inverters operating at 3.427 MW each Power Electronics FP4200M 59   https://app.halcyon.io/documents/deffb472-2c3f-4d82-8dc9-f2784575e983/attachment?page=78 True 252 MW battery energy storage project co-located with a 250 MW solar photovoltaic generating facility. OG&E Woodring Substation 345 kV Woodring Substation 345 Located in Garfield and Alfalfa Counties, Oklahoma, and is within the Southwest Power Pool balancing authority area 36.5214 -98.0344 https://maps.google.com/?q=36.521428,%20-98.03436 https://app.halcyon.io/entities/327e4829-ac48-43cd-a1bd-4a4553a03d44?page=2 Skeleton Creek Energy Center, LLC: developer and operator

NextEra Energy Resources, LLC: attorneys listed for Skeleton Creek Energy Center

Western Farmers Electric Cooperative: long-term PPA/capacity committed, purchaser/offtaker		           252 1008
Wildcat Ranch Energy Storage Wildcat Ranch Energy Storage, LLC 67134 68877 WLDC1 TX Cochran PNM May 2027 EG25-246-000 https://app.halcyon.io/processes/59d86ed0-524f-4560-ae5a-562da9b673b1 57244 https://app.halcyon.io/processes/4c50df41-f9c5-4039-8879-74d2a783c83d Lithium-ion 120 480 4 https://app.halcyon.io/documents/4d3b6b33-6a56-4976-a68e-3cffc91312c3/attachment Nov 21, 2023         https://app.halcyon.io/documents/1c77f722-0c0c-4eef-b53f-26f4e32f6a94   In Development Interconnection Requested https://app.halcyon.io/documents/4d3b6b33-6a56-4976-a68e-3cffc91312c3/attachment               True Wildcat Ranch Energy Storage is collocated at the existing Wildcat Ranch wind project (Wildcat Wind), which has a capacity of 150 MW.       Cochran County, TX 33.5242 -102.8773 https://maps.google.com/?q=33.524176,%20-102.8773 https://app.halcyon.io/documents/4d3b6b33-6a56-4976-a68e-3cffc91312c3/attachment - Wildcat Ranch Energy Storage, LLC (SPV)

- ESI Energy (Developer)

- NextEra Energy Resources (Parent Company)

- Southwestern Public Service Company (Interconnection counterparty)		           120 480
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