an electrical substation
Report
Utilities

The Megawatt you don’t build for

Flexible load, firm proof
Large-load flexibility is becoming an infrastructure alternative

But a promised curtailment is not capacity. Utilities can defer firm network investment only when flexible megawatts are contractible, observable, dispatchable and auditable.

The large-load problem is commonly framed as a race to build. That is only half the diagnosis. Electric utilities and grid planners face a compound uncertainty: the volume of proposed demand is unusually large, the probability and pace of project realization are uncertain, and the eventual electrical behavior of AI-intensive facilities may differ materially from a flat 24/7 block.

At a glance

Four signals for the executive committee, covering the scale of future demand, regulatory movement, demonstrated compute-level flexibility and the uncertainty already shaping grid-planning decisions.

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9–17%

EPRI’s scenario range for data centers’ share of US electricity demand in 2030, up from 4–5% in 2024.

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Six RTOs/ISOs

FERC ordered every regional grid operator under its jurisdiction to justify or reform large-load connection rules in June 2026.

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25% for 3 hours

A Phoenix field demonstration reduced power consumption in a 256-GPU AI cluster by 25% for three hours while maintaining the trial’s stated quality-of-service guarantees.

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Nearly 50% in Texas forecasting

NERC reports that new Texas data-center demand projections are reduced by almost 50% from initially requested levels to reflect observed early-operation consumption.

What leaders should do

Base decisions on common readiness, ramp and duplication criteria; define the constraint, notice, duration, frequency, rebound, priority and failure consequence before selecting technology; align telemetry, baseline, event records, audit access and settlement; pilot by constraint pocket; and award planning credit only through the applicable accreditation methodology and demonstrated performance.

Download the full report to examine the evidence behind large-load flexibility, compare the service models now taking shape and test what your utility would need to prove before a flexible megawatt can become planning-grade capacity.
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