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Halcyon Data Subscriptions

Quickly evaluate energy market dynamics and find new growth opportunities with regularly updated data sets collated from authoritative sources nationwide 
CONTINUOUSLY UPDATED

IRP Explorer

300+ Plans 200 Utilities

Integrated Resource Plans from electric and gas utilities, with planning horizons, EIA identifiers, and ownership type. Powered by Grids, which lets you quickly ask your own questions against the entire dataset.

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CONTINUOUSLY UPDATED

VPP Explorer

100+  Programs 35 States

Virtual power plant and demand-side management programs, from bring-your-own-device pilots to interruptible riders. Powered by Grids, which lets you quickly ask your own questions against the entire dataset.

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UPDATED - October 22 2026

Gas Power Plant Tracker

538 Plants 325GW 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.

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UPDATED - October 19 2026

Large Load Tariff Tracker

310 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.

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UPDATED - October 27 2026

Rate Case Tracker

339 Rate Cases 84M Utility Customers

Track key metrics from all IOU-submitted rate cases across the country.

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UPDATED - August 12 2026

Battery Energy Storage
System Tracker

965 BESS representing ~408 GWh 

Track planned U.S. utility-scale storage, with asset-level technology, timelines, prices, and changes.

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UPDATED - October 20 2026

New Substation
Development Tracker

Track 5924 projects informing new substation development nationwide.

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September 24 2025

FERC Large Load Interconnection — Show Cause Comparison

30 solutions from 6 grid operators across 5 reform categories

This comparison analyzes grid operator responses to FERC's Show Cause orders.

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We have a pipeline of Data Subscriptions in development, we’d love to hear what’s important to you. Please reach out.

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Halcyon News - ELI Dec022025-3

Halcyon Webinar: FERC Show Cause RTO/ISO Comparison 

FERC’s Show Cause orders have pushed all seven RTOs/ISOs to file their plans for connecting large loads like data centers. The approaches differ widely and move at different paces — staying on top of it all is impossible unless you have Halcyon.

In this 30-minute session, Halcyon experts Alex Klaessig, Jared Necamp and Jacob Grindal walked us through our FERC Show Cause RTO/ISO Comparison and cover:
  • How each of the seven RTOs/ISOs is answering FERC’s Show Cause orders
  • Which of the 29 reform mechanisms are drawing the most attention, and which are slower to take shape
  • The timelines and comment windows coming up next
Watch the recording now, for free.

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