Key takeaways
- PJM is confronting a 6.8 GW capacity shortfall that it attributes largely to surging data‑center demand, and will run a one‑time reliability backstop auction from Sept. 30 to Oct. 21.
- The backstop auction carries a price cap of $555 /MW‑day, up from $325 /MW‑day in PJM's most recent base auction, and PJM could commit as much as $20 billion toward new generation to supply data‑center projects built through 2027.
- PJM projects that data‑center and other large‑load electricity use could increase by as much as 70 GW by 2038.
- Separately, the U.S. Department of Energy has ordered two 380 MW units at the Eddystone Generating Station to stay online through November 20 2026; the units can run on natural gas or distillate fuel oil.
- Both moves land against a backdrop where operators like EdgeCore are already shifting campus power costs onto themselves — see our earlier coverage of EdgeCore's own-power stance and the TVA/PJM rate picture.
PJM's capacity shortfall and backstop auction
PJM, the regional transmission organization for much of the eastern United States, is preparing a reliability backstop auction scheduled for the end of September through October. The auction is intended to address a 6.8 GW shortage that the grid operator links directly to accelerating data‑center load growth.
PJM's own modeling indicates that the combined demand from data‑centers and other large customers could rise by up to 70 GW by 2038. To meet that projected need, the backstop auction is designed with a $555 /MW‑day overall price ceiling, which is higher than the $325 /MW‑day cap used in the previous base capacity auction. PJM has also signaled a willingness to spend as much as $20 billion building new generation capacity to keep pace with data‑center growth through 2027.
Price‑cap comparison
| Auction type | Price cap (per MW‑day) | Timing |
|---|---|---|
| Last base capacity auction | $325 | Prior to 2026 |
| Proposed backstop auction | $555 | Sept 30 – Oct 21, 2026 |
DOE‑ordered Eddystone extension
In the Mid‑Atlantic region, the Department of Energy issued an emergency directive that keeps Units 3 and 4 at the Eddystone Generating Station available through November 20 2026. Each of the two units is rated at 380 MW, for a combined 760 MW of capacity. The order, which became effective on August 23, permits the units to operate on either natural gas or distillate fuel oil, providing flexible, dispatchable generation that PJM can call on as needed.
Where this leaves campus power costs
EdgeCore's push to have data‑center operators fund their own power infrastructure — reported here previously — was already a sign that the traditional utility‑service model was straining under AI‑driven demand. This week's PJM and DOE actions are the grid‑operator side of the same pressure:
- PJM's backstop auction price cap of $555 /MW‑day reflects the scarcity premium that arises when the grid's capacity margin tightens.
- The temporary availability of the Eddystone units illustrates how federal intervention can hold dispatchable resources online to shore up reliability, but such measures are time‑limited.
- Together, they suggest AI operators should expect both higher clearing prices in organized markets and continued reliance on emergency generation extensions as data‑center load keeps outpacing new supply.
Stakeholders should therefore monitor the outcomes of PJM's auction and the expiration dates of emergency orders like the Eddystone extension when planning the power strategy for AI workloads.
Conclusion
PJM's backstop auction and the DOE's Eddystone extension are two sides of the same power‑market strain: capacity is scarce, prices are rising, and regulators are leaning on emergency measures to keep the lights on while data‑center demand keeps climbing. Close tracking of regional capacity initiatives — alongside operator‑side shifts like EdgeCore's own‑power model — will be essential for investors, engineers, and operators navigating the rapidly expanding AI compute landscape.
Sources
This article was researched and fact-checked against the following sources:
- EdgeCore Says Data Centers Should Pay Their Own Power Costs (datacenterknowledge.com)
- PJM’s Power Shortfall Puts Data Center Growth in Focus (datacenterknowledge.com)
- DOE Keeps Eddystone Plant Online Amid Data Center Demand Surge (datacenterknowledge.com)
- PJM files backstop auction plan at FERC to meet capacity shortfall | Utility Dive (utilitydive.com)
- DOE Eddystone Power Plant Order Extends Operations Through November (microgridmedia.com)
