System-operator load forecasts re-rated upward by an order of magnitude
Energy & power systems · Sector 05 (rank 3 of 25) · T-05-01
Score 90.2/100 · Evidence factor 1.00 · Confidence high · triangulated · Last verified 2026-09-15
In one sentence. Every major North American system operator revised its decade-ahead demand forecast sharply upward between late 2025 and mid-2026, attributing most of the increase to data centres.
Why it matters
Every capital allocation decision in the sector — generation, transmission, equipment orders, rate cases — is now priced off a demand forecast that moved twelve-fold in five years and was revised 69% in a single year. Decision-makers are committing thirty-year assets against a number with no stable history. The forecast is now the most consequential and least reliable input in the industry.
What is happening
Every major North American system operator revised its decade-ahead demand forecast sharply upward between late 2025 and mid-2026, attributing most of the increase to data centres. NERC's 2026 Long-Term Reliability Assessment raised the ten-year summer peak increase to 224 GW, 69% above the 132 GW it projected a year earlier, and called it the highest compound growth rate since NERC began tracking in 1995. PJM now forecasts 3.6% annual summer peak growth against 0.3% in its 2021 forecast — a twelve-fold change in the planning assumption. This is a change in the planning baseline itself, not a change in weather or economics.
First observable signal. PJM's 2023 load forecast was the first to break from two decades of flat-to-declining projections; NERC's 2023 LTRA first named data centres as a distinct driver. The step change arrived in the January 2026 assessments.
Evidence
| Claim | Type | Date | Source |
|---|---|---|---|
| NERC's 2026 LTRA projects a 224 GW increase in summer peak demand over ten years, 69% higher than the 132 GW in the prior year's assessment | forecast |
2026-01-29 | POWER Magazine (B) |
| Winter peak demand projected to rise 246 GW over ten years; new data centres account for most of the summer increase | forecast |
2026-01-30 | Utility Dive (B) |
| PJM forecasts 3.6% annual summer peak growth to 222 GW by 2036, versus 0.3% per year in its 2021 forecast | forecast |
2026-01-14 | PJM Inside Lines (A) |
| ERCOT's preliminary 2026-2032 forecast reaches 367,790 MW by 2032 against an all-time actual peak of 85,508 MW set in August 2023 | forecast |
2026-04-15 | ERCOT (A) |
| ERCOT itself describes the projection as 'a preliminary snapshot' that it expects 'to be higher than expected future load growth' | opinion |
2026-04-15 | ERCOT (A) |
| IEA attributes around half of the total increase in US electricity demand through 2030 to data-centre expansion | forecast |
2026-03-26 | International Energy Agency (A) |
| Exelon states only 22% of its 65 GW pipeline through 2040 is likely to materialise | estimate |
2026-05-15 | POWER Magazine (B) |
Where sources disagree
- Credible ten-year US peak demand growth — NERC 2026 LTRA: +224 GW summer, 13 of 23 assessment areas at elevated or high risk vs Grid Strategies review, 2026-07-06: All regions would hold 5-93% MORE reserves than target once likely-to-connect queue resources and non-firm imports are counted. Likely reason: NERC counts only firm, fully-committed resources against an uncapped demand forecast — an asymmetry that systematically produces a deficit. Grid Strategies counts probabilistic queue resources against the same demand. Neither adjusts the demand side for queue speculation, which is the larger error term.
Companies and products
Companies. PJM Interconnection, ERCOT, MISO, NERC, Exelon, Dominion Energy, American Electric Power
Products. Long-Term Reliability Assessment, PJM Load Forecast Report, ERCOT Long-Term Load Forecast
Funding. Not a funded trend; it is the planning assumption that directs an estimated $1.4T of announced US investor-owned utility capex through 2030 (EEI, 2026-05-27).
Impact
Industry. Beneficiaries: Independent power producers, Gas turbine OEMs, Transmission developers, Utility shareholders via rate base growth. Losers: Existing ratepayers where cost allocation fails, Industrial load competing for the same capacity, Late-arriving data-centre developers.
Consumer. Measurable in metered load: US commercial-sector consumption is forecast to grow 2.2% in 2026 and 5.3% in 2027 while residential stays near flat, and EIA expects commercial to surpass residential for the first time on record in 2027. No operator publishes metered data-centre-only load, so attribution remains inferred.
Regulatory. Directly triggered FERC Docket RM26-4 on large-load interconnection and the June 2026 Section 206 show-cause orders to all six RTOs. State legislatures in Texas and Ohio have legislated in response.
Geography. US, CA-Canada, EU, GLOBAL
Risks and counter-forces
- Forecast is self-reinforcing: utilities are rewarded for building against it
- Duplicate queue requests inflate the base
- A demand shortfall would strand assets with 30-40 year recovery periods
Counter-trends. Interconnection-queue speculation inflating apparent demand, AI capex retrenchment, Efficiency gains in accelerator silicon per unit of compute
Score breakdown
| Pillar | Score | Dimensions |
|---|---|---|
| Momentum (30%) | 95 | velocity 5 · adoption 4 · capital 5 · revenue 5 |
| Reach (25%) | 95 | breadth 5 · depth 5 · geography 4 · demand 5 |
| Durability (25%) | 80 | persistence 3 · maturity 4 · strategic 5 |
| Consequence (20%) | 90 | regulatory 5 · social 4 |
| Evidence | 100 | quality 5 · diversity 5 → ceiling 100 |
Stage growing · Direction accelerating · Horizon Immediate (0–12 months) · Reading: Act on it
Cross-sector themes. datacentre_demand (12 linked trends in other sectors)
What to watch next
T-05-05Interconnection queues rotating from renewables to gasT-05-07Large-load tariffs and the reallocation of interconnection cost riskT-05-18Unbounded data-centre load forecasts starting to deflate
Sources
- NERC forecasts peak demand to rise 24% on new data center loads — Utility Dive, 2026-01-30. Tier B. https://www.utilitydive.com/news/nerc-10-year-peak-demand-forecast-jumps-24-on-new-data-center-loads/810955/
- NERC Warns Long-Term Grid Reliability Risks Mounting from Surging Demand, Lagging Resources — POWER Magazine, 2026-01-29. Tier B. https://www.powermag.com/nerc-warns-long-term-grid-reliability-risks-mounting-from-surging-demand-lagging-resources/
- PJM's Updated 20-Year Forecast Continues To See Significant Long-Term Load Growth — PJM Inside Lines, 2026-01-14. Tier A. https://insidelines.pjm.com/pjms-updated-20-year-forecast-continues-to-see-significant-long-term-load-growth/
- 2026 PJM Load Forecast Report — PJM Interconnection, 2026-01-14. Tier A. https://www.pjm.com/-/media/DotCom/library/reports-notices/load-forecast/2026-load-report.pdf
- ERCOT Releases Preliminary Long-Term Load Forecast for Years 2026-2032 — ERCOT, 2026-04-15. Tier A. https://www.ercot.com/news/release/04152026-ercot-releases-preliminary
- Electricity 2026 — Executive summary — International Energy Agency, 2026-03-26. Tier A. https://www.iea.org/reports/electricity-2026/executive-summary
- Phantom Data Centers Didn't Break the Power Grid — They Proved it Was Already Broken — POWER Magazine, 2026-05-15. Tier B. https://www.powermag.com/phantom-data-centers-didnt-break-the-power-grid-they-proved-it-was-already-broken/
Generated from record T-05-01 via the canonical article template (18-editorial-formats.md). Research date 2026-09-15. Scores per 14-scoring-framework.md. Forecasts are conditional, never certainties.
- Source artifact
- 06-sample-reports/05-energy-power.md
- Corpus date
- 15 September 2026
- Prepared for this site
- 16 September 2026
- Site publication
- 18 September 2026
- Verification
- Inherited; not fully rechecked