ABB E-mobility today launched the OM X-Series, a distributed DC charging system that scales from 800 kW to 10 MW and beyond across more than 100 charge points on a single coordinated site architecture. Announced May 5 from Zurich, the platform targets transit depots, logistics hubs, and high-throughput public charging corridors where sustained duty cycles, rather than peak power, define operating economics. ABB E-mobility introduced the system at ACT Expo in Las Vegas, where it is on public display through May 6.
Highlights
- X-Series scales from 800 kW to 10 MW and beyond, supporting more than 100 charge points across one coordinated site
- End-to-end liquid-cooled power path delivers more than 98% conversion efficiency as a continuous operating condition
- Initial configuration pairs two 800 kW cabinets through a DC bus, supporting up to 24 charge outputs
- Direct DC-coupled battery storage improves round-trip efficiency by more than five percentage points compared with AC-coupled systems
Architecture Built for Sustained Load
The X-Series is the third stage in a deliberate architecture progression. The A-Series, launched in 2024, established the company’s high-power all-in-one charging platform. The OM M-Series, introduced two weeks ago, extended that work into modular split-system topologies scaling to 1.2 MW. The X-Series advances the same architectural logic to multi-megawatt sites and mission profiles that demand years of continuous operation rather than intermittent peak loads.
At continuous duty, thermal management determines whether efficiency and reliability specifications hold across the asset’s life. The X-Series addresses this with an end-to-end liquid-cooled power path: a power cabinet with integrated cooling unit, proprietary liquid-cooled power modules, and liquid-cooled cables. According to ABB, the modules sustain more than 98% conversion efficiency as a continuous operating condition rather than a rated peak — outperforming air-cooled alternatives across the duty cycles megawatt sites require. Built-in redundancy is designed to maintain operational continuity through planned and unplanned interruptions.
Three Integrated Elements
The X-Series combines three architectural elements into one site system. A site-level DC bus serves as the shared power spine, with cabinets and storage assets coordinating in real time. Liquid-cooled silicon carbide modules anchor the conversion layer. Battery energy storage connects directly on the DC bus, which ABB says improves round-trip efficiency by more than five percentage points versus AC-coupled storage and enables peak shaving without additional conversion stages. The architecture is also specified to support vehicle-to-grid energy flows where regulatory frameworks permit.
Field Scaling Without Stranded Assets
Because the architecture decouples AC/DC and DC/DC conversion and is specified for future power levels, a site commissioned with the initial X1600 configuration — two 800 kW cabinets feeding up to 24 charge outputs through a shared DC bus — can scale toward multi-megawatt operation on the same infrastructure. ABB says this avoids civil rework and stranded capital as load grows.
The OM M-Series and X-Series share a common dispenser portfolio. Operators can begin with M-Series equipment and migrate to X-Series topology as mission profiles intensify, adding a second dimension of scaling beyond modular power expansion alone.
Halbherr: Thermal Stability Is the Economics
“Charging is moving toward mission profiles where systems must operate under sustained load for years, not just peak moments,” said Michael Halbherr, Chief Executive Officer of ABB E-mobility. “At that level of utilization, thermal stability and energy efficiency are not specifications; they are the economics. The X-Series is built for that standard from the architecture up.”
Context: A Crowded Megawatt Field
The X-Series enters a megawatt charging segment that has accelerated through 2025 and 2026. ABB E-mobility itself, in partnership with MAN Truck & Bus, validated MCS performance at 740 kW peak in a 3.5-hour continuous test session last September. Kempower completed the first North American MCS session in March 2026, and Scania, Volvo Trucks, and ChargePoint have each rolled out megawatt-class hardware over the past 12 months. What distinguishes the X-Series in this field is the framing: ABB is positioning the product not as a higher-power dispenser but as a coordinated site architecture in which megawatt delivery, storage, and continuous duty are designed together rather than bolted onto one another.
The X-Series data sheet is available through ABB E-mobility’s product portal. ABB E-mobility is exhibiting at ACT Expo booth #3601 through May 6.
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