US Data Centers' Captive Power Push Triggers Federal Probe and Bipartisan Pushback
FERC's open cost-allocation investigation and a BloombergNEF 19-gigawatt supply gap expose the limits of off-grid gas as a ratepayer fix.
President Trump's Defense Production Act determinations, issued in April to accelerate grid and energy infrastructure permitting, fast-tracked data center power buildouts without settling the cost allocation dispute between hyperscalers and ratepayers, War on the Rocks reported on September 1 (2026-09-01). That unresolved question now sits before federal regulators and state grid operators with material consequences for how technology companies power their next generation of facilities.7
FERC drew the battle lines in June. On Thursday (2026-06-18), the commission launched a sweeping investigation into how regional grids and utilities divide up electricity delivery costs when data centers build captive generation and use the shared network selectively, directing the inquiry at operators covering nearly all major US load zones. The specific issue: whether private generation facilities should contribute to shared transmission cost pools, and at what scale.3
The demand trajectory explains the regulatory urgency. A Business Insider analysis published in June (2026-06-11) estimated that if all data centers permitted through 2025 come online, they will use between 224.3 and 358.8 terawatt-hours annually, an increase of roughly 50% over the prior cohort. BloombergNEF, as of July 2026, projects that US data centers will account for 20% of national power consumption by 2035, up from 5.9% at the time of publication.2,4
The Trump administration promoted captive power plants as a way to insulate ratepayers from rising electricity prices linked to data center growth. Oilprice.com reported in August (2026-08-23) that both Democratic and Republican representatives were pushing back against that model, calculating that hyperscalers building private generation and drawing on the shared grid only when convenient shift transmission upkeep costs onto households and small businesses.6,2
Off-grid gas generation does not close the supply gap on its own terms. BloombergNEF estimates that even if the grid interconnects 7 gigawatts of new data center demand per year, a pace that would set an all-time record, and even if many hyperscalers install their own gas turbines, the sector faces a 19-gigawatt shortfall by 2035. The Trump administration targets 10 new nuclear plants. At roughly 1 gigawatt per plant, that adds 10 gigawatts. The numbers do not balance.4
Texas applied its own pressure. Governor Abbott's letter calling for a clampdown on data centers, reported by E&E News in June (2026-06-11), was noted by University of Texas energy researcher Josh Rhodes as carrying limited binding authority in practice. Still, the signal reflected growing resistance from elected officials in a state where energy industry interests carry significant political weight, suggesting that public sentiment had moved faster than the regulatory machinery.1
PJM Interconnection moved in parallel. Canary Media reported in August (2026-08-21) that some PJM member states were conditioning expedited interconnection on data centers meeting energy use, economic, and community engagement standards, a direct follow-through on the grid operator's call to rein in new load growth.5
But a competing model has found advocates. Utility Dive reported on September 1 (2026-09-01) that AI data centers, unlike conventional large industrial loads, can modulate consumption dynamically when grid stress rises, operating within system capacity constraints rather than against them. The Brattle Group estimates that a 10% improvement in grid utilization from demand flexibility would cut average retail power rates by nearly 4%. That is a fundamentally different outcome from captive gas plants, which exit the shared network and reduce grid utilization rather than improve it.8
BloombergNEF's 19-gigawatt shortfall estimate already assumes significant self-generation by hyperscalers. The gap persists after the private buildout trend is accounted for, which means neither captive gas plants nor flexible demand management alone resolves the arithmetic.4
FERC's investigation remains open, with no published timeline for cost-allocation rulings. The pricing rules that PJM and other regional transmission organizations set for behind-the-meter generation will shape the financial case for off-grid development. Impose material grid contribution charges in proportion to shared infrastructure use, and the captive-plant economics weaken sharply. The first draft of those rules, expected from ongoing interconnection proceedings, is the next concrete signal for developers deciding where to site the following round of AI campuses.3,5