The world's energy system is quietly rewiring itself. The dominant new energy sources and loads are natively direct current (DC): Photovoltaic systems generate it, batteries store it, and electric vehicles and AI data centers consume it. Yet the distribution infrastructure connecting them still runs on alternating current (AC), the architecture that has prevailed since the 1890s.

WHERE DC DELIVERS REAL VALUE TODAY

AI Data Centers

<p>For AI data centers, DC is becoming the required architecture: it meets the power density demands of next-generation AI hardware, fits more compute behind a scarce grid connection, and turns efficiency gains directly into revenue.&nbsp;</p>

Industrial Application

<p>For automation-intensive industrial plants, the business case is positive from the first day of operation, driven by the DC-native loads that most factories already contain.</p>

Commercial Buildings

<p>For large commercial buildings, DC already pays by creating a backbone for major loads such as elevators, climate-control systems, and energy storage while leaving tenant-facing systems on AC.</p>

WHAT DRIVES DC ADOPTION?

The explosive growth in AI compute demand, renewable energy capacity, and the rising penetration of power electronics are creating a perfect storm for DC adoption. Direct current systems eliminate costly and inefficient AC-to-DC conversions as more energy flows through power electronics, renewable sources, and battery storage systems - making DC the natural choice for efficient power architectures.

2x

<p>Projected growth in global data center electricity consumption by 2030<sup>1</sup></p>

70%

<p>Of all electrical energy is processed by power electronics<sup>2</sup></p>

6x

<p>Forecast growth in global battery storage capacity by 2030<sup>3</sup></p>

2x

<p>Forecast growth in global solar PV capacity by 2030<sup>4</sup></p>

DEMYSTIFYING DIRECT CURRENT ARCHITECTURE

Myth 1: DC is only for niche or small-scale applications.

The reality is that DC already operates across every voltage tier. HVDC has been commercially mature for decades in offshore wind and grid interconnection. At the LVDC tier, IT equipment, EV batteries, and drives run on DC internally, and AI data centers are transitioning to 800V DC distribution, with AC converted to DC centrally.

Myth 2: DC cannot be protected safely.

The concern has a sound physical basis. Unlike AC, DC has no natural current zero-crossing, making faults more difficult to interrupt. Until recently, that posed a genuine engineering challenge. Advances in solid-state and hybrid breakers have largely removed it. Commercial systems now interrupt DC faults in microseconds, and international standards increasingly define safe operation for LVDC installations.

Myth 3: DC is inherently more expensive.

Some DC components still carry a premium because they are produced at far lower volumes than comparable AC equipment. That premium reflects manufacturing scale, not a fundamental property of DC. For the total system cost, shared DC architectures can reduce conversion equipment, copper use, and space requirements while increasing usable power density.

DC SOLUTIONS IN PRACTICE

Combining AC for regional distribution with DC for high-power applications creates value across industries. Suppliers and operators that move early will gain an advantage.

Marine & Ports

Direct Current systems pioneered by ABB more than a decade ago transformed marine electrification, proving that DC power can deliver higher efficiency, lower emissions and greater flexibility in mission-critical environments. In Canada, ABB’s integrated power, propulsion and control solutions equip BC Ferries’ new hybrid-electric major vessels, demonstrating how DC integration works at scale in marine infrastructure. ABB’s Onboard DC Grid™ power distribution system enables higher system efficiency than comparable propulsion arrangements.

Data centers

Data Centers represent the most immediate and capital-intensive proving ground for DC architecture, as AI and cloud workloads push power densities beyond what traditional AC infrastructure can efficiently support. Today, one in four data centers use ABB DC technologies. Currently, ABB is developing 800V DC solutions for next-generation AI infrastructure with NVIDIA.

Industrial

Direct current systems revolutionize industrial operations by enabling more efficient, cost-effective power distribution in specialized manufacturing environments. DC power is particularly valuable in energy-intensive industries such as electrolysis plants, electric arc furnaces, and welding operations. Moreover, DC microgrid systems allow for integrating renewable energy sources like solar and wind power. In Finland, ABB powers Europe’s first low-carbon aluminium smelter with high-power DC rectifier expertise. In Canada, ABB partners with Hydrogen Optimized to supply DC power systems for large-scale green hydrogen production.

Buildings

Large commercial buildings already contain significant DC-native loads — elevators, climate control, EV charging, energy storage. A shared DC backbone reduces conversion losses and creates a platform for smarter energy management. ABB offers DC solutions across the full building infrastructure stack.

HYBRID ARCHITECTURE

The future of power architecture is hybrid. AC remains, and will remain, the backbone of most transmission and regional distribution; over a century of mature protection systems and cost-efficient transformers still outperform DC at that scale. What’s changing is the architecture inside the facilities that connect to it with emerging DC sub-systems forming the hybrid architecture. Understanding this model empowers industries to become more future-ready for the coming next era of energy architecture.

BARRIERS TO DC ADOPTION

Standards remain fragmented

Standards exist across the DC voltage range but vary in maturity and are inconsistent across regions. As a result, equipment approved in one market may require redesign, retesting, or project-specific approval in another, adding cost and slowing deployment. Organizations such as Current/OS and the Open DC Alliance work towards advancing a coherent and interoperable ecosystem for direct current.

Skills gap in DC expertise

Lack of technical experts is one of the most cited DC barriers. The shortage of skills is concentrated in a narrow set of DC-specific competences. Those competences sit close to the existing VFDs and power electronics workforce, making targeted retraining and closing the skills gap faster than building an entirely new workforce.

WANT TO LEARN MORE?

Explore insights from ABB and BCG for:

  • Electrification and automation suppliers
  • Data center, plant, and building operators