Halcyon Data Subscriptions
Gas Power Plant Tracker
247 Plants 153GW Capacity
US gas-fired power plant costs have tripled this decade. Halcyon has built a multi-state, centralized feed of all planned US assets, with asset-level technology, timelines, prices, and changes.
Large Load Tariff Tracker
161 Tariffs
Large load tariffs are specialized electricity rate structures designed for customers with significant power demand, like data centers. These tariffs are used to allocate costs more equitably, ensure grid stability, and manage risk.
Rate Case Tracker
278 Rate Cases 84M Utility Customers
Track key metrics from all IOU-submitted rate cases across the country.
Battery Energy Storage
System Tracker
734+ BESS representing ~325 GWh
Track planned U.S. utility-scale storage, with asset-level technology, timelines, prices, and changes.
New Substation
Development Tracker
Track 445+ projects informing new substation development nationwide.
FERC ANOPR Comment Analysis
175 Organization comments
This workbook summarizes comments submitted regarding FERCs proceeding on the interconnection of large load (RM26-4-000).
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E3 and Halcyon: Large Load Tariff Whitepaper
As data centers and AI-enabled computing drive a scale of load growth utilities haven't seen in decades, large load tariffs have become the primary mechanism for allocating costs and protecting existing customers from cost shifts — but designs vary so widely that comparing them is difficult. In this new whitepaper, E3 partners with Halcyon to leverage data from Halcyon's Large Load Tariff Tracker and examine how these tariffs translate into actual electricity bills for large customers and how costs differ across regions and rate designs.
Download the whitepaper now, for free.