Database of Emerging Large-Load Tariffs (DELTa)

Electricity tariffs – utilities’ rates and contracts with their customers – are a key tool for managing the costs and uncertainties that come with serving large, new customers.

Explore this comprehensive map of 75+ tariffs 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 using the form below the map.

Smarter Rates for Large Loads

U.S. electricity demand is rising quickly, driven primarily by data center buildout, manufacturing, and both vehicle and building electrification.

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 customers that costs and benefits of new infrastructure investment will be fairly allocated. 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 the Database of Emerging Large-Load Tariffs (DELTa) — a public, user-friendly database of contemporary utility rates, contracts, and key service rules for large loads. NCCETC and SEPA track regulatory activity regularly and plan to update DELTa quarterly.

DELTa offers:

• An interactive map and database of 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 for a large-load growth era.

Each 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.

SEPA and NCCETC invite all stakeholders to connect with our organizations to explore research projects, convenings, and education that leverage DELTa.