Data Center as a Bottleneck Market

On 18 December 2025 the Federal Energy Regulatory Commission ordered PJM, the grid operator serving 67 million people in 13 states and Washington, D.C., to write new transmission services for data centers built beside power plants, a sign that the grid, not the chips, now sets how fast AI capacity switches on. That shift is what the data center as a bottleneck market measures: spending on the grid hookups, on-site power, electrical distribution, batteries, cooling and control software that turn a planned campus into energised megawatts. Douglas Insights values the data center as a bottleneck market at USD 55.2 billion in 2025 and forecasts USD 180 billion by 2035, a compound growth rate of 12.56% a year. The receipt is about 12,600 megawatts of IT capacity commissioned worldwide in 2025 at an average USD 4.38 million of constraint-relief spending per megawatt. The volume leg adds 9.6% a year as AI and cloud campuses keep arriving, and the spend leg adds 2.7% a year as rack densities rise and more operators build their own power. The study sits within Douglas Insights coverage of data centre infrastructure and follows the published Douglas Insights research methodology.

What spending counts toward unlocking data center capacity in this study?

The data center as a bottleneck market counts USD 55.2 billion of 2025 spending on the physical layers that most often stop a data center from going live: power in, power through, and heat out. The International Energy Agency’s Energy and AI report puts data centre electricity use at 415 TWh in 2024, about 1.5% of world electricity, and says around 20% of planned data centre projects are at risk of delay from grid limits.

The data center as a bottleneck study splits value by relief layer into Medium and low voltage power distribution and UPS, Grid interconnection and substations, On-site and bridge power generation, Chillers and heat rejection, Liquid cooling, Battery energy storage, and Power monitoring and load flexibility software. It also splits value by facility type into Hyperscale and AI campuses, Colocation facilities, and Enterprise and edge sites, and by delivery model into New-build campuses and Retrofits of operating sites. Servers, accelerators, networking, buildings, land and utility-side transmission lines beyond the campus fence are excluded. The cooling layer is sized in more depth in the Data Centre Liquid Cooling Market report, and airflow hardware in the Modular Data Centre Containment Systems Market report.

What did FERC’s 18 December 2025 co-location order change for data center power?

The FERC order gave PJM until 19 January 2026 to report on faster generator interconnection and set out new service options for data centers co-located with power plants, and Douglas Insights estimates it moves about 4.5 GW of stalled US capacity toward energisation by 2028. A February 2025 show cause order had found PJM’s tariff unclear on co-location.

The December 2025 order matters for the data center as a bottleneck market because it rewards the layers that let a campus run before the grid is ready: on-site turbines, fuel cells, batteries and switchgear that can island a site or follow grid limits. The order runs through this report. It lifts the on-site power segment, favours suppliers that deliver in months, and splits the slower and faster scenarios.

What drives spending to unlock data center megawatts?

Four forces lift the data center as a bottleneck market, and AI electricity load is the largest. The IEA expects data centre electricity use to more than double from 415 TWh in 2024 to about 945 TWh in 2030 and to reach around 1,200 TWh by 2035 in its base case, with the United States holding 45% of today’s use and nearly half of US electricity growth to 2030 coming from data centres. Douglas Insights converts that curve into about 12,600 MW of IT capacity commissioned in 2025, rising to about 31,500 MW a year by 2035, a 9.6% annual volume leg that adds most of the market’s growth.

Grid scarcity is the second driver. The IEA reports that lead times for transformers and cables have doubled in three years, that new transmission lines take four to eight years in advanced economies, and that gas turbine deliveries now take several years. Operators that cannot wait buy their own substations and bridge generation, and Douglas Insights estimates on-site and bridge power spending grows 14.51% a year, from USD 8.77 billion in 2025 to USD 34.0 billion in 2035, adding about 1.1 points a year to the spend leg.

Rack density is the third driver. AI racks built on current accelerator platforms draw 100 to 140 kW, against 8 to 15 kW for a typical cloud rack five years ago, so each megawatt needs heavier busways, larger UPS blocks and liquid cooling loops. Vertiv, a leading supplier of power and thermal systems, reported 2025 net sales of USD 10.2 billion, up 27.7%, and a year-end backlog of USD 15.0 billion, up 109%. Douglas Insights estimates density adds about 1.0 point a year to spend per megawatt.

Load flexibility is the fourth driver. Grid operators connect large loads faster if they agree to curtail during peaks, which needs batteries and software that shed load within seconds. The IEA estimates that better use of existing lines could unlock about 175 GW of transmission capacity without new wires. Douglas Insights estimates battery storage and load flexibility software together grow from USD 8.11 billion in 2025 to USD 30.9 billion in 2035, adding about 0.6 points a year to the spend leg. Together the four drivers take constraint-relief spending per megawatt from USD 4.38 million in 2025 to about USD 5.72 million in 2035.

What holds back the data center as a bottleneck market?

Three restraints hold the data center as a bottleneck market to 12.56% a year, and equipment supply itself is the first. With transformer and turbine factories booked for years, Douglas Insights estimates factory capacity caps the volume leg about 1.2 points below the pace that announced projects would imply.

Chip efficiency is the second restraint. Each accelerator generation delivers more computation per watt, and inference workloads can move to more efficient chips and smaller models, so power need does not rise one for one with AI use. The IEA’s own 2035 range runs from 700 TWh to 1,700 TWh, and Douglas Insights removes about 0.8 points a year from volume growth for efficiency gains.

Financing and local opposition are the third restraint. Several US counties, Ireland and the Netherlands have paused or restricted new hookups over water, noise and power prices. Douglas Insights removes about 0.5 points a year from volume growth for cancelled or deferred campuses.

Which infrastructure layer carries the value in unlocking data center capacity?

Medium and low voltage power distribution and UPS carries the most data center as a bottleneck value at 28.1% of 2025 revenue, USD 15.5 billion, while Liquid cooling grows fastest at 20.84% a year.

Medium and low voltage power distribution and UPS is worth USD 15.5 billion in 2025. Every megawatt needs switchgear, busways, distribution units and UPS, and AI racks need more of each.

Grid interconnection and substations is worth USD 10.1 billion in 2025. Large campuses now build their own high-voltage substations of 200 MW to 1 GW and pay for utility upgrades, because the utility cannot fund them fast enough.

On-site and bridge power generation is worth USD 8.77 billion in 2025. Gas turbines, reciprocating engines and fuel cells let a campus open years before its grid connection is ready.

Chillers and heat rejection is worth USD 7.73 billion in 2025. Air-cooled halls still need chillers, cooling towers and dry coolers, but growth slows to 6.90% a year as liquid loops take the densest racks.

Liquid cooling is worth USD 4.97 billion in 2025 and grows fastest at 20.84% a year to USD 33.0 billion by 2035. Direct-to-chip cold plates and coolant distribution units are now standard on AI racks above about 50 kW, which air cannot cool.

Battery energy storage is worth USD 4.42 billion in 2025. Lithium iron phosphate systems replace lead-acid UPS strings and give grid operators the fast response they ask for before connecting a flexible load.

Power monitoring and load flexibility software is worth USD 3.70 billion in 2025. Operators need second-by-second control of IT load to agree curtailment terms and to squeeze more IT capacity from a fixed grid allocation.

How do facility type and delivery model split data center relief spending?

By facility type, Douglas Insights estimates Hyperscale and AI campuses take about 64% of 2025 data center as a bottleneck value, Colocation facilities about 27%, and Enterprise and edge sites about 9%. By delivery model, New-build campuses take about 81% and Retrofits of operating sites about 19%, with retrofits concentrated in liquid cooling and battery upgrades of halls built before 2022.

Which region spends most to unlock data center capacity?

North America spends the most in the data center as a bottleneck market, USD 25.5 billion in 2025 or 46.2% of the total, growing 12.72% a year to USD 84.4 billion by 2035. The United States holds 45% of global data centre electricity use, and Northern Virginia, Texas, Ohio and Arizona face the longest grid queues, which is why US operators buy the most on-site power and substations.

Asia Pacific spends USD 16.2 billion in 2025 and grows 12.52% a year to USD 52.8 billion, led by China, Japan, India, Singapore and Australia, with Johor in Malaysia absorbing capacity that Singapore limits. Europe spends USD 8.33 billion in 2025 and grows 10.03% a year to USD 21.7 billion, the slowest region, because grid limits in Dublin, Amsterdam and Frankfurt push projects to the Nordics, Spain and Italy rather than creating new spending.

The Middle East and Africa is the fastest-growing region at 16.40% a year, from USD 3.09 billion in 2025 to USD 14.1 billion by 2035, because the United Arab Emirates and Saudi Arabia are building gigawatt-scale AI campuses powered by dedicated gas and solar plants. Latin America spends USD 2.04 billion in 2025 and grows 13.42% a year to USD 7.19 billion, led by Querétaro in Mexico and São Paulo in Brazil, where cheap renewable power attracts cloud regions.

Which companies supply the power and cooling that unlock data center capacity?

Douglas Insights estimates Schneider Electric holds about 15.3% of 2025 data center as a bottleneck value, and the top five suppliers hold about 47.7%, with no company strong in every layer.

Advantage in the data center as a bottleneck market rests on factory slots, not only technology: a supplier that can ship switchgear, transformers or turbines within 12 months wins orders from operators paying for speed. Vertiv’s 2025 book-to-bill of about 2.9 times in the fourth quarter shows how far orders now run ahead of shipments. Schneider Electric leads on breadth, GE Vernova and Caterpillar on turbines and engines, and Bloom Energy on fuel cells.

What price per megawatt do operators pay to unlock data center capacity?

Operators paid an average USD 4.38 million per megawatt of IT capacity for the layers in the data center as a bottleneck market in 2025, and Douglas Insights expects about USD 5.72 million by 2035. A conventional air-cooled cloud hall spends about USD 3.2 million to USD 3.8 million per megawatt on these layers, while an AI hall with liquid cooling, a private substation and bridge turbines spends USD 5.5 million to USD 7.5 million. Grid interconnection alone runs USD 0.4 million to USD 1.2 million per megawatt. Bridge power from gas turbines or engines adds USD 1.0 million to USD 1.8 million per megawatt of firm capacity. Spend per megawatt in the data center as a bottleneck market rises 2.7% a year because density, liquid loops and on-site power raise content faster than factory scale lowers unit prices.

How long do transformers, turbines and grid queues hold data center projects?

Large power transformers now take two to four years to arrive, gas turbines several years, and new transmission lines four to eight years, so the data center as a bottleneck market is paced by factories and permits rather than by construction crews. The IEA reports that transformer and cable lead times doubled in three years. A 300 MW campus that orders transformers in 2026 may not energise its full load before 2029 unless it buys bridge power or accepts curtailment. Douglas Insights estimates that about 38% of capacity commissioned in 2025 opened with some form of temporary or on-site power, against under 10% in 2021. Douglas Insights expects lead times to ease from 2028 as new transformer factories from Hitachi Energy, Siemens Energy and GE Vernova ramp.

What 2035 range does Douglas Insights set for data center unlocking spend?

The base scenario takes the data center as a bottleneck market to USD 180 billion by 2035, inside a range of USD 115 billion to USD 270 billion. The slower scenario assumes chip efficiency gains outpace AI use, several large campuses are cancelled, and the FERC co-location approach spreads slowly, setting the legs at 6.1% for megawatts and 1.4% for spend per megawatt for USD 115 billion. The faster scenario assumes AI training and inference loads follow the upper IEA path, on-site power becomes standard, and grid operators trade faster hookups for flexibility, setting the legs at 12.8% and 3.9% for USD 270 billion. Each 1-point change in megawatt growth moves the 2035 data center as a bottleneck figure by about USD 17.1 billion. Published growth estimates for data center power and cooling range from about 9.8% to 17.3% a year, and the Douglas Insights figure sits in the middle because it counts commissioned capacity rather than announced pipelines.

Which laws and permitting orders govern data center power hookups?

Two US federal actions and a set of European grid laws shape the data center as a bottleneck market, and Executive Order 14318 of 23 July 2025 is the broadest. The order, published in the Federal Register, speeds federal permits for data center projects above 100 MW or USD 500 million of investment and for the transmission lines, substations and transformers that serve them. The FERC order of 18 December 2025 then told PJM to offer defined services for co-located load. In the European Union, the recast Energy Efficiency Directive requires data centres above 500 kW to report energy and water use, and Ireland’s energy regulator limits new Dublin connections to sites that bring their own dispatchable power. Ireland, the Netherlands and Singapore have used moratoria or allocation rounds to ration grid access.

Douglas Exclusive: the data center as a bottleneck megawatt queue tracker

The megawatt queue tracker follows 412 data center campuses above 50 MW in 31 countries, logging requested grid capacity, utility queue position, energisation date, on-site power plans and the long-lead equipment each has ordered, so the data center as a bottleneck market can be read campus by campus. The tracker shows that campuses using bridge power energised a median 22 months sooner than those waiting for the grid, and that about 61 GW of requested load sat in US utility queues at mid-2026. Related coverage sits in the Data Centre Liquid Cooling Market, Modular Data Centre Containment Systems Market and Cryptocurrency Mining Market reports.

Methodology and receipts: how do 12.6 GW add up to USD 55.2 billion?

The data center as a bottleneck model multiplies about 12,600 megawatts of IT capacity commissioned in 2025 by an average USD 4.38 million of constraint-relief spending per megawatt, giving USD 55.2 billion. Megawatts come from the 412-campus queue tracker, operator disclosures and utility filings in 31 countries, reconciled with IEA electricity estimates. Spend per megawatt comes from 7 relief layers priced from supplier results, tender awards and build budgets for 3 facility types. The forecast compounds 9.6% megawatt growth and 2.7% spend growth from the 2025 base to about 31,500 MW and USD 180 billion in 2035.

Sources

1. Federal Energy Regulatory Commission FERC Directs Nation's Largest Grid Operator to Create New Rules to Embrace Innovation and Protect Consumers (2025)
2. Federal Register (Office of the Federal Register) Executive Order 14318: Accelerating Federal Permitting of Data Center Infrastructure (2025)
3. International Energy Agency Energy and AI: Executive summary (2025)
4. Vertiv Holdings Co, filed with the US Securities and Exchange Commission Vertiv fourth quarter and full year 2025 results (Exhibit 99.1) (2026)