EV charging behemoth ABB E-mobility offers a range of EVSE systems to address use cases of all shapes and sizes. The company’s latest offering is the OM X-Series, a distributed charging system designed to provide a single coordinated site architecture for the largest and highest-power charging sites. The system can scale from 800 kW to 10 MW and beyond, across more than 100 charge points.
ABB E-mobility calls the X-Series the third step in its architecture progression. The A-Series, launched in 2024, is a line of all-in-one chargers. The OM M-Series, launched in April 2026, extended the same architecture into site-level split systems. The new X-Series “advances this architecture to the highest-performance applications: sustained duty cycles, megawatt-scale site topologies, and multiple mission profiles within one shared power system.”
As ABB explains, megawatt charging sites may sustain continuous duty for years, so thermal management is critical to maintaining efficiency and reliability specifications. The X-Series features an end-to-end liquid-cooled power path: power cabinet with integrated cooling unit; proprietary liquid-cooled power modules; and liquid-cooled cables that carry thermal management through every conversion stage.
The X-Series site architecture consists of three integrated elements. A site-level DC bus forms a shared power spine across which cabinets and storage assets coordinate, and enables capacity to move in real time to match demand. The power conversion layer consists of liquid-cooled silicon carbide modules. Battery energy storage connects directly on the DC bus, a feature that ABB says improves round-trip efficiency by more than five percentage points compared to AC-coupled systems, and enables peak shaving and demand management without additional conversion stages. The architecture is also designed to support vehicle-to-grid energy flows.
The initial X-Series configuration consists of two 800 kW cabinets connected through a DC bus, and supports up to 24 charge outputs. ABB E-mobility can extend the system to multi-megawatt scale on this architecture.
The OM M-Series and X-Series share a common dispenser portfolio, allowing sites to begin with M-Series chargers and extend to X-Series topology as demand grows.
“Charging is moving toward mission profiles where systems must operate under sustained load for years, not just peak moments,” said Michael Halbherr, CEO 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.”
Source: ABB E-mobility