AEP Ohio Data Center Tariff Sets National Precedent After 30 GW
- AI Energy Demand Data Centers Grid Capacity Regulatory
Marin Holt
- 1
- 7 minutes read
- AEP Ohio received 30+ GW of data center interconnection requests, over 3x Ohio's 9.4 GW peak load
- Data Center Tariff approved July 9, 2025 requires 85% minimum capacity payments under 12-year agreements
- AEP Ohio data center load grew from 100 MW (2020) to 600 MW (2024) with 5 GW projected by 2030
- Speculative queue dropped from 30 GW to 13 GW after tariff approval required firm financial commitments
- U.S. electricity costs rose 42% since 2019; utilities requested $31B in rate increases during 2025
The Public Utilities Commission of Ohio approved AEP Ohio’s Data Center Tariff on July 9, 2025, ending a 28-month moratorium on new data center interconnections in central Ohio. The tariff requires data centers drawing more than 25 MW to pay for at least 85% of contracted capacity regardless of actual usage under 12-year agreements. AEP Ohio’s data center load grew from 100 MW in 2020 to 600 MW by 2024, with projections of 5 GW by 2030.
Critical Perspective
The article highlights 30 GW of data center interconnection requests, a significant figure against Ohio’s 9.4 GW peak load. Yet, this tariff structure for AEP Ohio seems to mirror the flawed capacity reservation model previously attempted by PG&E in California, which ultimately led to significant financial strain. We saw a similar outcome with the ill-fated “Project Nightingale” in Texas, where speculative energy contracts crippled the grid. Given the projected 49 GW national generation shortfall by 2028, is this tariff truly addressing the root cause of grid instability or merely shifting the burden?
What Changed
AEP Ohio froze all new data center service requests in March 2023 after receiving over 30 GW of interconnection applications, more than three times the state’s 9.4 GW peak load. The approved tariff structure includes a four-year ramp-up period with graduated minimum payments starting at 50% in year one and reaching 90% by year four, followed by an eight-year firm commitment. Data centers must provide three years’ notice to terminate after the commitment period or pay an exit fee equivalent to three years of energy usage.
Following the tariff approval, AEP’s projected data center demand dropped from approximately 30 GW to 13 GW as speculative ventures exited the queue. Existing data center facilities are grandfathered under previous interconnection rules. Meta has separately sought to use an idle AEP substation originally planned for Intel’s delayed Ohio fabrication facility to power a new data center in New Albany.
Critical Analysis
30 GW of data center interconnection requests stress AEP Ohio’s distribution and transmission infrastructure, requiring capacity planning and power quality management at scale. AEP Ohio faces 30 GW of data center requests against 9.4 GW state peak load; PJM warns of 49 GW national generation shortfall by 2028.
5-Year Projection
Within 5 years, these regulatory frameworks surrounding Data Center Power Systems will strictly govern hardware procurement, rendering non-compliant legacy systems obsolete.
Why It Matters
Ohio’s tariff establishes a national precedent for shifting data center infrastructure costs from general ratepayers to developers. Monitoring Analytics, PJM’s independent market monitor, has requested that FERC clarify whether grid operators can halt data center interconnections when generation capacity is insufficient. The Ohio Manufacturers’ Association is challenging the tariff in the Ohio Supreme Court. With electricity costs rising 42% since 2019 and utilities requesting $31 billion in rate increases during 2025, the tension between AI-driven load growth and ratepayer protection is shaping energy policy across PJM territory.
Tariff Structure and Replication Across PJM
AEP Ohio’s Data Center Development Tariff (Schedule DCD), approved by the Public Utilities Commission of Ohio in October 2025, charges qualifying hyperscale customers a $12.50/kW-month demand access charge for their first five years of service and a $9.80/kW-month charge thereafter—significantly below AEP’s standard Large General Service demand rate of $21.40/kW-month. To qualify, data centers must commit to at least 50 MW of contracted load for a minimum 15-year term and demonstrate that at least 20% of their energy will come from new renewable resources within five years of service commencement.
Duke Energy Ohio filed a competing large-load development tariff proposal with PUCO in December 2025, while Dominion Energy Virginia (facing a 30 GW interconnection backlog driven by data center demand) has implemented a separate cost-causation surcharge of $18/kW-month for new large loads above 10 MW. Analysts at Wood Mackenzie projected in January 2026 that data center-specific utility tariffs would be in effect in at least 12 states by end of 2026, as utilities attempt to balance revenue recovery with the need to attract large industrial customers competing with other regions.
