Brattle Study Puts $170 Billion Price Tag on US Grid Underutilization
A 10% improvement in distribution grid utilization would reduce US electricity rates by 4.8% and save customers up to $170 billion over ten years, according to Brattle Group analysis.
A 10% improvement in annual distribution grid utilization would cut US electricity rates by up to 4.8% and save customers between $110 billion and $170 billion over the next decade, according to a Brattle Group study cited Monday (2026-07-14) by Sparkfund CEO Pier LaFarge in Utility Dive. The figure reframes where the affordability lever in US electricity actually sits.3
Over the past century, US utilities built the distribution system to peak, engineering infrastructure to handle maximum demand that materializes in roughly 50 to 100 hours a year. The grid runs at near-100% availability and costs most US states between 3% and 4% of GDP, LaFarge noted. It is reliable. For most of the remaining hours in a year, those wires carry far less than they could.3
LaFarge's argument is that selling more power over wires already financed by ratepayers is the most direct path to lower bills. He draws a distinction between distributed resources managed for the owner's financial benefit and those operated for system benefit. Rooftop solar exported at midday peak reduces the homeowner's bill but does not help a grid stressed in the early evening. "For true distribution grid infrastructure, utilities need resources that are 100% operated for system benefit," he wrote.3
The debate lands as US load growth forecasts rise faster than at any point in recent decades, driven by data-center construction and AI workloads. Writing in Oilprice.com in late June (2026-06-29), one analyst noted the AI power boom has revived the public utility financing debate. US utilities currently run equity capital layers around 50% of their capital structures, roughly double what James Bonbright considered appropriate in his foundational 1930s work on US utility economics, and more than double the roughly 20% equity layers pre-Fukushima Japanese utilities carried.2
The arithmetic on financing costs is blunt. One estimate put the potential consumer saving from replacing high-cost utility equity with government-backed debt at 10% to 15% of electricity bills. At 50% equity in a low-risk monopoly business, ratepayers fund a risk premium that exceeds the underlying business risk. Whether rate cases will take up that argument depends partly on political pressure, and US electricity bills have been rising as electrification spreads.2
Coal's continued dominance puts the utilization argument in broader relief. The fuel still accounts for approximately 35% of global electricity supply, according to GlobalElectricity.org, with roughly 2,100 GW of operational capacity worldwide as of 2024. High fixed-cost generation assets produce their lowest unit costs when run hard. That utilization principle applies as directly to distribution infrastructure as it does to thermal plant economics.1
A 10% system-wide utilization improvement is not a modest target. It requires demand-response programs that reach commercial and industrial customers reliably, tariff structures that reward load shifting over raw consumption, and regulatory processes willing to price grid efficiency rather than simply approve more capital investment. State utility commissions are practiced at reviewing capital addition requests. Redesigning incentives around utilization returns is the harder part of the Brattle arithmetic.3,2
NYMEX Henry Hub front-month gas traded at $2.92 on Tuesday (2026-07-14), flat on the session. A sustained improvement in distribution grid utilization would over time reduce the marginal gas-fired generation called on during off-peak hours, but that effect unfolds across years of rate cases, not trading sessions. The near-term signal for US power markets is whether the next wave of utility rate filings incorporates utilization-based returns or follows the familiar path of capital additions financed at an equity layer that critics say remains too high.3