Data Centers Switch to DC Power, Cut Copper Use 45%

The data centers powering tomorrow's AI are finally fixing a century-old energy waste problem, and the results are remarkable.

Tech giants are abandoning the traditional alternating current (AC) power systems that have dominated data centers since their inception. Instead, they're switching to 800-volt direct current (DC) systems that eliminate wasteful energy conversions and dramatically reduce the massive amounts of copper required to keep servers running.

The change couldn't come at a better time. Modern AI computing racks now draw nearly 1 megawatt of power each, compared to just 10 kilowatts for traditional setups. Under the old AC system, a single rack could require 200 kilograms of copper wiring, and the constant back-and-forth conversion between AC and DC power meant significant energy disappeared as heat.

The new DC approach converts grid power directly to 800 volts of DC at the data center's edge, then delivers it straight to the chips. This eliminates most of the conversion steps that plagued older designs.

The benefits are staggering. Companies like Vertiv, Eaton, and Delta report that the switch cuts copper requirements by 45 percent while improving energy efficiency by 5 percent. For massive data centers, this translates to 30 percent lower operating costs and a dramatically smaller environmental footprint.

Chris Thompson from Vertiv explains that compact DC converters now step down voltage right at the rack level, feeding power directly to the processors that need it. No more converting to AC and back again, no more massive transformers eating up space and generating heat.

The Ripple Effect

This shift means more than just cheaper data centers. The reduced copper demand eases pressure on global mining operations, while the improved efficiency means less strain on electrical grids already struggling to meet growing energy demands.

China has already deployed higher-voltage DC data centers, and American tech leaders aren't far behind. Meta and Microsoft are collaborating through the Mt. Diablo Initiative to test 400-volt DC systems, while Vertiv plans to launch its 800-volt ecosystem commercially in 2026.

Delta has already released 800-volt power racks with embedded battery backup, proving the technology is ready for prime time. SolarEdge is developing transformers that achieve 99 percent efficiency, meaning almost no energy gets wasted in conversion.

The transition does face hurdles. Patrick Hughes from the National Electrical Manufacturers Association notes the industry needs standardized safety frameworks and coordinated equipment ecosystems before widespread adoption can happen. Manufacturers are cautiously investing, waiting for clear standards before retooling their production lines.

But the momentum is undeniable. As AI computing demands continue growing exponentially, the efficiency gains from DC power become impossible to ignore.

Thomas Edison championed DC power over a century ago before losing the "current wars" to AC systems, and now his approach is finally getting its moment in the most cutting-edge facilities on Earth.