DELTa: Database of Emerging Large-Load Tariffs

Electricity tariffs are a key tool for managing rapid, concentrated load growth from new large loads like data centers.

Explore this first-of-a-kind comprehensive map of over 100 large-load utility tariffs and service rules designed to help plan for load growth, fairly distribute costs and benefits, and support local policy objectives in the United States. Download the full database below.

Smarter Rates for Large Loads

U.S. electricity demand is rising quickly, driven in the near term primarily by data center buildout. Across the industry, stakeholders are exploring new procedures, programs, and rules to gain a clearer view of growth forecasts, plan strategically for new grid infrastructure, and assure all customers that costs and benefits of new infrastructure investment will be fairly distributed. In particular, many are working to adjust or develop new large customer tariffs to manage the costs of growth in tandem with goals for economic development, energy affordability, and clean energy.

To help navigate these challenges, SEPA and the NC Clean Energy Technology Center (NCCETC) created DELTa, the Database of Emerging Large-Load Tariffs — the first public, user-friendly database of contemporary utility tariffs and service rules for large loads. NCCETC and SEPA regularly track state regulatory and policy activity and update DELTa quarterly.

DELTa offers:

• An interactive map and database of approved and proposed utility large-load tariffs and service rules in the United States
• Case summaries and analysis of approved and proposed tariffs and service rules; and
• A way to compare how different utilities are refining their approach.

Each utility tariff or service rule included in DELTa targets one or more of the following objectives:

• Improving transparency, customer protections, and risk mitigation around large loads;
• Specifying the customer commitments essential for the utility to begin investing in large-load service;
• Incentivizing large customers to help manage peak load and support new clean energy; and
• Defining customer size and operational thresholds beyond which new structures may help achieve system requirements and policy goals.

To partner with SEPA and NCCETC on research, convenings, or education that leverages DELTa, please contact us at the email below.