Database of Emerging Large Load Tariffs (DELTa)

Additional Resources

Large-Load Tariff Trends from DELTa

• SEPA and NC Clean Energy Technology Center (April 2026) U.S. Data Center Gold Rush Drives Surge in New Utility Tariffs
• SEPA and NC Clean Energy Technology Center (February 2025) Innovative Utility Tariffs Pave the Way for Flexible, Carbon-Free Data Centers

Additional Load Growth Resources

• CoBank (2026) The State of Large Load Rate Design
• Corporate Energy Buyers Association (2026) Powering Progress: The Critical Role of Clean Energy Tariffs
• Electric Power Research Institute (2026) Powering Intelligence 2026: Updated Scenarios of U.S. Data Center Electricity Use and Power Strategies
• National Association of Utility Regulatory Commissioners (2026) Load Growth Resources for Regulators
• National Conference of State Legislatures (2026) State Energy Legislation Database [Includes tag for Data Center Energy Legislation]
• North Carolina Clean Energy Technology Center (2026) 50 States of Power Decarbonization https://www.dsireinsight.com/publications [Includes state-by-state tracking of Large-Load Customer Treatment legislation and regulatory proceedings]
• Lawrence Berkeley National Laboratory (2026) Retail Electricity Price Trends and Drivers: Data Update−2026 Edition
• Lawrence Berkeley National Laboratory (2026) United States Data Center Energy Usage Report: 2025 Update
• Brattle Group (2025) Deliberate Design: Creating Electricity Rates with Purpose
• Energy Futures Group (2025) Review of Large Load Tariffs to Identify Safeguards and Protections for Existing Ratepayers
• Lawrence Berkeley National Laboratory (2025) Electricity Rate Designs for Large Loads: Evolving Practices and Opportunities
• RMI (2025) Large Load Tariff Principles