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

RELEASED *

December 2nd, 2025

RECENT UPDATES

 

257 BESS projects tracked 

TOTALS

56 GW //
155 GWh

BESS_Map_Dec2025-1

*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 currently covers systems over 100 MW of capacity and will add 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

(27 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
EIA Anticipated Month Anticipated month of commercial operation reported by the EIA
EIA Anticipated Year Anticipated year of commercial operation reported by the EIA
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
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
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

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