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PJM capacity, 5CP peak load contribution · estimate

CleanArc Data Centers, Caroline County, Virginia

A 900 MW campus whose first 300 MW comes online in 2027. In PJM, its capacity charge is set by what it draws in five summer hours.

PJM coincident-peak charge a year at the announced load

$109,530,000

on 900 MW drawn at all 5 peaks, at $121.7/kW-yr

At the published draw, 0 MW$0At 900 MW$109,530,000Each peak sat out$21,906,000

What sets it: The five highest PJM load hours, each on a separate weekday, June to September. Each of those peaks the campus curtails through takes its share off the year.

Change these numbers

What the estimate uses

  • 900 MW treated as draw at peak hours once built out: the campus's announced grid capacity, built in three 300 MW phases through the mid-2030s.
  • 0 MW treated as draw at peak hours now: nothing is operating yet. Ground broke in November 2025 and the first 300 MW is due online in the first quarter of 2027.
  • No curtailment. The rate, $121.7/kW-yr, comes from PJM 2027/2028 auction results: 2027/2028 capacity price, $333.44/MW-day, times 365. Your utility's loss and scaling factors apply on top. It is not the site utility's own tariff.

Sources

  • CleanArc Data Centers (PR Newswire), Nov 20, 2025: 900 MW of grid capacity near Ruther Glen; the first 300 MW online in 1Q 2027, the second projected for 2030, the third in 2033 to 2035.
  • Construction Dive, Dec 1, 2025: the campus is under construction, with 900 MW of grid capacity in phases and the first 300 MW expected in 2027.

Figures as published on October 30, 2026. PJM Peak Load Contribution: mean of the five coincident peak hours, scaled by the zone's factors.

What this is not

  1. Not a bill. Announced capacity is not metered load, and a campus rarely draws all of it at a system peak.
  2. One charge only, the PJM capacity, 5CP peak load contribution. Energy, other transmission and distribution charges are not in it.
  3. The figure assumes the campus curtails at none of the peaks. Sitting peaks out is what lowers it.

Run your actual contracted and drawn MW, year by year, in the estimator. Corrections to the public figures: contact.