Megawatt truck charging scales beyond the pilot phase

By early 2026, the Megawatt Charging System (MCS) had solidified its position as the emerging global standard for ultra-fast charging of heavy-duty electric trucks, with the IEC TS 63379 specification enabling up to 3.75 megawatts through a uniform, cross-manufacturer interface. Designed for manual operation despite its substantial size and high current capacity, MCS suits long-haul trucking scenarios where drivers connect during rest breaks, but its physical demands and manual nature present challenges in space-constrained or high-throughput environments.

While MCS addresses a critical segment of heavy-duty charging, alternative megawatt charging technologies are advancing to either surpass its power capabilities or eliminate the need for manual connectors, thereby catering to diverse operational contexts. For instance, at Power2Drive Europe, akroVA showcased a manually operated plug rated for up to six megawatts using innovative ring-shaped contact surfaces, and Fraunhofer IVI introduced an automated underbody charging system capable of delivering 4.5 megawatts, targeting depot, port, and autonomous vehicle applications where rapid, hands-free charging is paramount.

This shift in innovation reflects a broader industry debate moving beyond connector standardization towards whether a single interface like MCS can comprehensively serve the varied spectrum of heavy-duty transport charging needs. Stakeholders now question if MCS alone can efficiently support public motorway hubs, depot operations, and autonomous logistics terminals, or if a portfolio of complementary or alternative systems is necessary to optimize charging infrastructure across different use cases and operational constraints.

Fraunhofer's HV-MELA-BAT program demonstrates a breakthrough in modular DC/DC converter technology by achieving megawatt-level EV charging from limited grid connections, specifically enabling over 1 MW charging from just a 500 kW link. This is made possible through a galvanically isolated series resonant converter operating at up to 200 kHz, delivering an exceptional power density of 9 kW/l and peak efficiency of 99.26%, with modular scalability up to 1 MW. The integration of second-life EV batteries as buffer storage within a common DC bus architecture not only enhances operational flexibility but also supports bidirectional power flows and the seamless incorporation of on-site solar generation, optimizing load balancing and energy use.

CSI's Mobile Battery Energy Storage Systems (BESS) push the envelope further by incorporating bidirectional Megawatt Charging System (MCS) capabilities on both input and output sides, allowing rapid recharging and high-power delivery up to 1 MW for commercial EVs in grid-constrained environments. This bidirectional 480 VAC connection extends functionality beyond vehicle charging to include building load management, peak shaving, and energy shifting, thereby enhancing economic viability for fleet operators. As Greg Laudermilch, CSI’s VP of Sales and Marketing, highlights, this mobile energy storage approach acts as a flexible infrastructure bridge, enabling fleets to adopt next-generation electric vehicles without waiting for permanent grid upgrades or charging infrastructure installation.

Volvo Penta’s mobile BESS subsystem, showcased powering Contour’s Hivolt 380X fast-charging unit at IAA 2026, exemplifies the growing trend of modular, high-performance energy storage solutions tailored for sites with limited or no permanent grid infrastructure. Featuring high energy density, rapid charge/discharge capabilities, and an advanced battery management system that ensures longevity and cybersecurity, this European-made platform targets transport, logistics, and off-highway sectors requiring scalable charging capacity without the delays of grid upgrades or permitting. This solution underscores the industry’s shift toward flexible, deployable energy storage that can meet the demanding needs of commercial EV charging in diverse operational contexts.

Siemens’ launch of the 1.68 MW SICHARGE FLEX marks a pivotal advancement in high-power EV charging, delivering dynamic power scaling from 480 kW up to 1.68 MW with support for both CCS and MCS standards. Its flexible installation options—allowing up to 300 meters from the central power supply—and integration with cloud-based management platforms like Sifinity Control and DepotFinity enable scalable, secure, and efficient operation tailored for heavy-duty transport corridors. This combination of cutting-edge power delivery and robust cybersecurity positions SICHARGE FLEX as a foundational technology for next-generation megawatt charging infrastructure.

The real-world pilot deployment by OMV Austria on the Germany–Italy A12 corridor exemplifies how megawatt-class charging infrastructure can be scaled in tandem with grid upgrades and intelligent energy management. Starting with six charging points at Kufstein and expanding to ten post local grid enhancement, this project showcases the critical role of distribution system operator collaboration and cloud-based optimization in managing limited grid capacity while supporting heavy-duty electric fleets on major transport routes.

CSI’s introduction of bidirectional Megawatt Charging System (MCS) capability in its mobile Battery Energy Storage Systems (BESS) redefines flexibility for heavy-duty EV charging by enabling rapid recharge of the BESS itself and delivering up to one megawatt of power to vehicles. As Greg Laudermilch, CSI’s VP of Sales and Marketing, highlights, this mobile energy storage approach allows charging infrastructure to dynamically follow demand, bridging gaps while permanent grid upgrades and fixed stations are developed. Eligible for substantial CORE Voucher funding, these systems serve diverse sectors including Class 8 trucks, buses, ports, and construction, aligning with emerging international standards like IEC TS 63379 and SAE J3271 that promote interoperability in megawatt charging ecosystems.

Volvo Penta’s unveiling of a modular, European-made mobile BESS subsystem at IAA 2026 further advances fast EV charging solutions tailored for sites with limited or no grid infrastructure. Built on the Volvo Group’s proven battery platform, this system combines high energy density and rapid charge-discharge cycles with advanced battery management and cybersecurity features, enabling transport and logistics operators to deploy scalable, zero-emission charging capacity without the delays of grid upgrades or permitting. This approach exemplifies a shift toward flexible, integrated energy storage and charging solutions that accelerate the transition to heavy-duty electric mobility across challenging operational environments.

By mid-2026, the commercial EV sector has seen a transformative shift toward modular, off-the-shelf power distribution units that consolidate multiple electrical functions—such as switching, protection, sensing, diagnostics, and communications—into unified platforms. Sensata’s OmniNode™, operating up to 1,000 V DC and 500 A continuous current, exemplifies this trend by simplifying complex vehicle electrical architectures and enhancing safety through compliance with ISO 26262 standards up to ASIL-B. This integration not only reduces engineering complexity but also accelerates OEM development timelines, enabling scalable electrification for Class 5-and-above commercial vehicles.

Eaton’s development of scalable onboard charging protection technologies complements these modular power distribution solutions by helping OEMs and fleet operators navigate cost-benefit trade-offs tailored to specific vehicle applications. The combined effect of these integrated systems addresses longstanding challenges in electrical architecture complexity and safety, streamlining procurement and fostering flexible platforms that support future battery-electric vehicle programs. As a result, manufacturers can achieve greater consistency and efficiency in vehicle platform design, ultimately accelerating the broader adoption of megawatt-level commercial EV charging.