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Editorial Article

Global Power Supply: The Essential Bridge Between Electricity Generation and Demand

Updated September 13, 2026

Power Supply: The $71 Billion Market Between the Grid and Everything Else

Every account of electrification starts with a battery and ends with a grid. Neither does anything without a box in the middle. A power supply takes electricity in whatever form the system happens to have it — 230 volts alternating at 50 hertz from a wall socket, 800 volts direct current from a data-centre busway, 400 volts from a traction pack — and converts it into the form a load can actually use, at an efficiency the system can afford. Nothing electric runs without one. Almost nobody outside the industry can name a company that makes them.

Pheonix Research sizes the global power supply market — AC-DC and DC-DC conversion for consumer electronics, industrial equipment, telecom, data centres, renewable inverters and vehicle systems — at USD 42.6 billion in 2025, rising to USD 70.8 billion by 2033 at a 6.7% CAGR. That is a 1.66x expansion over eight years, and it makes power supplies the slowest-growing market anywhere in the electrification chain Pheonix covers.

Set it beside its siblings and the gap is stark. Pheonix puts the EV battery market at a 19.03% CAGR to 2033, lithium mining at 18.97%, stationary energy storage at 18.31%, EV charging infrastructure at 17.61%, battery recycling at 17.51%, electrolyte production at 17.27%, battery manufacturing equipment at 17.02% and EV thermal management at 14.58%. Power supply, at 6.7%, is the only one in single digits — and the only one old enough to have an ordinary growth rate.

A market priced by the watt

The reason is not that electricity is going out of fashion. It is that a power supply is sold as a cost per watt rather than as a capability. A converter is specified against efficiency, density, thermal performance and price, and then it competes for a socket on a board or a shelf in a rack where the substituting alternative is another converter, usually from a supplier that already has the platform. Pheonix characterises the market as moderately consolidated with ten tier-one players, high competitive intensity, high capital intensity and rising M&A activity — the shape of a market where revenue follows volume and volume follows price.

That is what a mature technology stage looks like. Pheonix rates power supply technology as mature, with innovation intensity still high but the product architecture largely settled: switch-mode conversion, wide-bandgap semiconductors at the margin, and a decades-old fight over a few points of efficiency. Regulation is the other departure from the rest of this chain. Pheonix rates regulatory complexity low, with a standardised commercial approval pathway — a rare thing in a series where nearly every other link is governed by a binding safety standard, a chemical restriction or an industrial-policy regime.

The strategic consequence is a market that captures electrification as volume rather than as value. Every charger installed, every inverter commissioned, every kilowatt of data-centre load added pulls power conversion along behind it. Whether any of that shows up in converter makers’ revenue depends on price per watt — and price per watt has been falling for four decades.

Conversion is not one product

The blended CAGR hides a split market, and the split matters more than the average. Power supply covers board-mounted DC-DC converters, embedded AC-DC supplies inside industrial and medical equipment, external wall adapters, server and rack power supply units, high-power industrial rectifiers and busway systems, onboard chargers and auxiliary converters in vehicles. These are not the same business. A 65-watt wall adapter is bought in tens of millions at a few dollars each, and its margin is a manufacturing problem. A megawatt-scale rectifier feeding a data-centre busway is an engineered system sold to a small number of very large buyers, and its margin is an engineering problem.

Both are counted in the same 6.7%. The difference is that the second is where the industry’s technical agenda now sits, and where a slow market can still be a strategically important one.

Where a slow market becomes interesting

One development does change the value of the box, and it is happening in data centres.

The IEA’s Energy and AI work puts data-centre electricity consumption at roughly 415 TWh in 2024, about 1.5% of global electricity, and projects it more than doubling to around 945 TWh by 2030 — just under 3% of world consumption, and slightly more than Japan consumes in total today. In its 2026 update, the agency puts the 2025 figure at 485 TWh rising to about 950 TWh by 2030, with consumption at AI-focused facilities tripling over the period and a base case approaching 1,200 TWh by 2035. Within those numbers, conversion efficiency stops being an engineering footnote: one percentage point of delivered efficiency across 950 TWh is 9.5 TWh a year that a utility does not have to generate.

That is why the power architecture of the AI data centre is being rebuilt around the converter. NVIDIA has set out a transition from the 54 VDC distribution that has served racks for two decades to an 800 VDC busway, converting 13.8 kV grid power directly to 800 VDC at the facility perimeter and eliminating most intermediate AC-DC and DC-DC stages. The company’s stated gains are up to 5% end-to-end efficiency, maintenance costs down by up to 70% because fewer power supply units and fans sit in the chain, and total cost of ownership down by up to 30%. The physical argument is as blunt as the financial one: a single 1 MW rack at 54 VDC needs up to 200 kg of copper busbar, while the same conductor at 800 VDC carries 85% more power, cutting copper requirements by around 45%. Full-scale production is targeted alongside rack-scale systems in 2027.

This is a design change that moves conversion out of the rack and into the facility, which changes who sells what to whom — from a dense market of server power supply units to a smaller number of much larger rectifier and busway systems. It also pulls wide-bandgap devices further into the mainstream. Gallium nitride and silicon carbide converters switch faster and lose less than silicon, and suppliers are now pushing GaN devices beyond the 650-volt class that has bounded them, precisely to serve 800 VDC architectures.

Where the demand actually sits

Data centres are the fastest-moving end market, but they are not the largest. Power supplies sit inside consumer electronics and their wall adapters, industrial automation, telecom infrastructure, medical equipment and lighting. They sit behind every solar and wind installation, converting DC from panels and the variable output of turbines into grid-compatible power. And they sit on board the electric vehicle: in the onboard charger that turns AC into DC, and in the auxiliary DC-DC converter that steps traction-pack voltage down for the vehicle’s electronics.

That last point ties this market back into the rest of the chain. An onboard charger is a power supply with a thermal budget, and its efficiency is paid for twice — once in energy and once in the cooling it does not need. The conversion layer and the thermal layer of an electric vehicle are the same engineering problem approached from opposite ends.

Regional structure follows electronics manufacturing. Pheonix identifies Asia-Pacific as the dominant region on the strength of component and systems production across China, Japan, South Korea and India, and the supplier list reflects it: Delta Electronics and TDK at the centre, alongside Mean Well and Murata; with Siemens, ABB and Schneider Electric serving the industrial and infrastructure end, and Advanced Energy in high-end conversion and semiconductor-equipment supply.

A risk profile that is unusual for this chain

Power supply carries a high overall risk rating, but not for the reasons the rest of the electrification chain does. Pheonix rates geopolitical exposure moderate and substitution risk moderate — higher than EV thermal management on both counts, lower than stationary storage on geopolitics. The exposure is real but conventional: wide-bandgap device supply, power-semiconductor fabrication, and trade policy that already touches both. The IGBT and battery-management IC constraints the Pheonix EV charging report flags are the same constraints arriving one layer down.

What is missing is the thing almost every other market in this series has: a policy gravity well. There is no GB 38031-2025 equivalent for power supplies, no PFAS restriction rewriting the refrigerant, no capacity mechanism rewriting the revenue stack. That means no strategic stockpiling, no export-control premium and no subsidy race to ride. A market priced per watt stays priced per watt.

What to watch

Three things decide whether power supply stays a 6.7% market or becomes something more consequential.

The first is the 800 VDC transition, whose production timeline begins in 2027. If the data-centre industry moves to higher-voltage DC distribution at scale, the addressable conversion market changes shape and the component mix shifts further toward higher-voltage silicon carbide and gallium nitride.

The second is wide-bandgap penetration above 650 volts. Device cost, not device physics, is the binding constraint, and the pace at which GaN and SiC reach parity with silicon in the high-voltage classes determines how quickly efficiency gains get designed in without a price premium.

The third is whether any of the value created stays with the converter. Every previous architecture change in this industry increased the strategic importance of power conversion while reducing its price. The market may repeat that pattern a fourth time — in which case the box in the middle becomes more consequential and no more valuable.

That is the quiet position power supplies occupy. On Pheonix’s numbers the market is roughly two-thirds the size of stationary energy storage in 2025 and under a third of it by 2033. It will not be the growth story of the electrification decade. It will be the precondition for every other growth story in it — and the place where a single percentage point of efficiency is worth more than most product launches.

Sources and further reading

Pheonix Research market intelligence:

Primary and reference sources:

  • IEA, Energy and AI and Key Questions on Energy and AI — data-centre electricity consumption: 415 TWh in 2024 (~1.5% of global electricity), more than doubling to around 945 TWh by 2030, with a 2026 update at 485 TWh in 2025 rising to about 950 TWh by 2030 and a base case near 1,200 TWh by 2035. Regional split: United States ~45%, China ~25%, Europe ~15% in 2024.
  • NVIDIA, NVIDIA 800 VDC Architecture Will Power the Next Generation of AI Factories (May 2025) — the 54 VDC to 800 VDC transition, production timing from 2027, and the efficiency, maintenance, copper and total-cost-of-ownership figures cited above.
  • Power Integrations, 1250 V / 1700 V PowiGaN for 800 VDC AI Data Center — wide-bandgap device development beyond the 650-volt class for higher-voltage DC architectures.

 

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Frequently Asked Questions

Why is this market growing so much more slowly than the rest of the electrification chain?

Because it is a mature market priced by the watt rather than by the capability. Pheonix rates the technology stage mature, competitive intensity high and capital intensity high, with ten tier-one players. Converters compete against other converters on efficiency, density and price, so revenue follows volume while price per watt declines. Against that, nearly every other link in the chain — EV batteries at 19.03%, lithium mining at 18.97%, stationary storage at 18.31% — is still expanding from a much smaller or much younger base.

What does the power supply market actually cover?

Six broad groups: board-mounted DC-DC converters; embedded AC-DC supplies inside industrial, medical and telecom equipment; external adapters for consumer devices; server and rack power supply units; high-power industrial rectifiers and busway systems; and vehicle conversion in the form of onboard chargers and auxiliary DC-DC converters. The price per watt and the margin structure differ sharply between them, and the high-power industrial end is where the engineering agenda now sits.

How much electricity do data centres use?

The IEA puts data-centre consumption at about 415 TWh in 2024, roughly 1.5% of global electricity, and projects it to more than double to around 945 TWh by 2030 — just under 3% of world consumption. Its 2026 update puts 2025 at 485 TWh rising to about 950 TWh by 2030, with AI-focused facilities tripling and a base case approaching 1,200 TWh by 2035. The United States accounted for the largest share in 2024 at about 45%, followed by China at 25% and Europe at 15%.

Who are the leading suppliers and which region dominates?

Asia-Pacific dominates, on the strength of component and systems manufacturing across China, Japan, South Korea and India. The participants Pheonix names include Delta Electronics and TDK, alongside Mean Well and Murata, with Siemens, ABB and Schneider Electric serving industrial and infrastructure applications and Advanced Energy in high-end conversion and semiconductor-equipment supply.