SB4559, the Energy Cost Fairness and Reliability Act of 2026, would direct the Federal Energy Regulatory Commission (FERC) to create a formal federal interconnection framework for large load facilities, especially data centers and other high-demand users seeking service from the interstate transmission system. The bill defines “large load facilities” as facilities or aggregated sites with peak demand above 50 megawatts and requires FERC to issue final rules establishing a load interconnection queue, standard study procedures, and conditions for interconnection. Those conditions include paying the full cost of interconnection studies, meeting reliability standards, and demonstrating demand flexibility, curtailability, and a commitment to secure new generation or equivalent supply resources to serve the load.
The bill also creates a broader policy structure for managing the grid impacts of rapid load growth driven by artificial intelligence, electrification, and industrial expansion. It would require large load customers to bear 100% of assigned network upgrade costs, prohibit shifting those costs to other customers, and impose deposits, milestone payments, and withdrawal penalties to discourage speculative requests. For colocated facilities, the bill provides non-firm transmission access and injection rights on an as-available basis, while also requiring gross-demand charges for ancillary and black start services when the facility remains interconnected to the grid. It further directs DOE to collect data from data centers, establish an AI testbed at a National Laboratory, and report to Congress and FERC on load growth, grid reliability, water use, and energy-efficient AI technologies.
The bill’s impact on state and federal law would be significant primarily at the federal level. It amends the Federal Power Act to give FERC explicit direction to regulate large-load interconnection procedures and queue management, while preserving state authority over retail electricity rates, charges, and terms of service. Transmission providers subject to FERC jurisdiction would need to revise tariffs, adopt new study and cost-allocation practices, and implement queue discipline for large load requests. Data center owners and operators could face new reporting obligations to DOE, and large load developers would likely need to plan for more stringent technical, financial, and reliability requirements before connecting to the grid.
General sentiment in the bill text is strongly supportive of the need to address large-load growth, grid reliability, and electricity affordability, with the findings emphasizing national security, technological leadership, and ratepayer protection. The bill frames the issue as an urgent response to data center expansion and AI-driven demand, and it favors a more structured, cost-causal approach to interconnection. No committee transcript or vote record is provided, so there is no recorded legislative debate or roll-call sentiment beyond the bill’s stated policy rationale.
The main points of contention likely concern who pays for grid upgrades, how much flexibility FERC should have in setting technical standards, and whether the bill’s labor-related prioritization criteria are appropriate for an interconnection statute. The bill requires large load customers to fund all assigned network upgrades and study costs, which would likely be supported by ratepayer advocates and utilities but opposed by large-load developers and data center operators. Its labor provisions—prevailing wage, registered apprenticeships, and labor peace agreements as prioritization factors—may also draw support from labor groups and criticism from industry stakeholders. Additional tension may arise over DOE data collection, confidentiality protections, and the extent to which federal rules could affect project timelines and market access for new data center and industrial loads.
SB4559 would amend the Federal Power Act to require FERC to establish a new federal interconnection regime for large load facilities, including a formal load interconnection queue, standardized study procedures, cost assignment rules, and reliability-based approval conditions. It would shift most interconnection and upgrade costs to large load customers, require tariff revisions by transmission providers, and direct DOE to collect data and conduct research on data center energy use and AI-related load growth, while expressly preserving state jurisdiction over retail rates and service terms.
The bill’s overall tone is proactive and protective of grid reliability, affordability, and national competitiveness, with a clear preference for making large-load customers responsible for the costs and operational impacts they create. Because no committee discussion or votes are available, there is no recorded legislative opposition or support beyond the bill’s own findings, but the structure suggests likely support from consumer, reliability, and labor interests and likely resistance from data center, large-load, and some utility stakeholders.
Likely areas of contention include full cost responsibility for interconnection studies and network upgrades, the requirement that large-load customers demonstrate demand flexibility and curtailability, and the bill’s prioritization rules tied to battery backup, prevailing wage, apprenticeship use, and labor peace agreements. Stakeholders may also dispute DOE’s data-collection authority, confidentiality protections, and whether FERC should be directed to adopt a one-size-fits-all queue system for a rapidly evolving class of load. Large-load developers may view the bill as increasing project costs and delays, while ratepayer advocates may see it as preventing cost shifting to other customers.