ABB E-mobility Launches OM X-Series

ABB E-mobility launched the OM X-Series at the Advanced Clean Transportation (ACT) Expo in Las Vegas on May 5, 2026, a distributed DC fast-charging platform that scales from 800 kW to 10 MW and beyond across more than 100 charge points on a single coordinated site, targeting transit depots, logistics hubs, and high-throughput corridors where sustained duty cycles drive operating economics. The system uses an end-to-end liquid-cooled power path to sustain more than 98% conversion efficiency as a continuous operating condition. S1

The problem it targets

Heavy-duty fleet charging fails at the edges: isolated charging clusters waste energy as heat and strand capacity as a depot scales from a handful of trucks to a full megawatt-scale operation. ABB’s answer is architectural. A site-level DC bus acts as a shared “power spine,” and battery energy storage connects directly on that DC bus, which ABB says improves round-trip efficiency by more than five percentage points versus AC-coupled storage. CEO Michael Halbherr put the design thesis bluntly: “Thermal stability and energy efficiency are not specifications; they are the economics.” S2

What is genuinely new

The distinguishing feature is granularity at scale. Dynamic power sharing across dispensers operates at 66.5 kW increments, letting the system allocate power finely across many vehicles instead of stranding it in fixed-size chargers. The initial configuration is two 800 kW cabinets linked over a DC bus with direct battery-storage integration, supporting up to 24 charge outputs, then expandable past 100 charge points on the same spine. The liquid-cooled modules and cables — not just liquid-cooled connectors — are what let ABB rate continuous-duty operation rather than peak bursts. S3

Market context and competitors

ABB is entering a crowded megawatt-charging field. Tellus Power Global recently introduced its Nexus Megawatt Charging System, a modular platform spanning 600 kW to 1.2 MW for fleet and commercial use, and Kempower has validated megawatt charging in U.S. truck deployments. ABB’s differentiation is the ceiling — 10 MW and 100-plus points on one shared DC bus with integrated storage — pitched at large transit and logistics depots rather than single high-power corridor stalls. ABB did not disclose pricing or U.S. availability at launch. S1

Critical Perspective

The headline 10 MW is a site-architecture maximum, not a single-port rating: the building block remains 800 kW cabinets, so a “10 MW” deployment is a coordinated cluster, and the >98% efficiency is a conversion-stage figure that excludes site-level transformer and distribution losses. The DC-coupled storage advantage is real but depends on a fleet adding batteries — operators who skip storage forgo the five-point round-trip gain. With no published price, the case that liquid cooling pays for itself in lower energy losses over a heavy duty cycle is plausible but, for now, against total cost of ownership. S2

Why It Matters

For fleet operators electrifying class-8 trucks and transit buses, the binding constraint is no longer vehicles — it is depot power that can charge dozens of high-capacity batteries on tight turnaround without overheating or stranding capacity. A platform that scales from 800 kW to 10 MW on one DC bus lets a depot start small and grow without civil rework, and the DC-coupled storage path is how operators shave demand charges that often dominate depot operating cost. The OM X-Series signals that megawatt charging is consolidating around shared-DC-bus architectures with integrated storage as the reference design. S3

Related Coverage

• ABB E-mobility Launches MCS1200 1.2-Megawatt Charger With Integrated Solid-State Transformer for Heavy-Duty Trucks: ABB E-mobility launches another high-power charger for heavy-duty trucks
• Kempower MCS Launches at Fleet Depots in Sweden and California: Other companies also launch megawatt charging solutions for fleet depots
• WattEV Unveils 12 to 15 kV Solid-State Transformer for Megawatt Charging of Heavy-Duty Electric Trucks: Solid-state transformers are key for megawatt charging of heavy-duty trucks
• DG Matrix Ships First Commercially Available Multiport Solid-State Transformer Aligned With NVIDIA 800VDC AI Factory Spec: Solid-state transformers are enabling high-voltage DC for AI factories