However, the successful electrification of long-haul freight requires not only suitable vehicles and high-capacity batteries, but also a charging infrastructure capable of replenishing several hundred kilowatt-hours of energy within the limited stopping periods available during freight operations.

This talk presents an overview of Megawatt Charging Systems (MCS) for long-haul BETs, with particular emphasis on their deployment and interaction with the electricity network in Great Britain. The presentation first examines the operational characteristics of long-haul battery electric trucks, including battery capacity, energy consumption, state-of-charge behaviour and the influence of vehicle mass, driving speed, temperature and journey characteristics on energy demand. Different charging strategies, including depot, destination, public overnight and en-route charging, are discussed, with particular attention given to the need for megawatt-class en-route charging during relatively short driver rest periods.

The talk then introduces the architecture and technical characteristics of MCS, including high-power DC conversion, thermal management, vehicle–charger communication, protection requirements and emerging international standards. A modelling framework for estimating charging demand is presented, in which traffic characteristics, journey distance, battery state of charge, energy consumption and charging participation are used to generate individual and aggregated charging load profiles. The importance of stochastic and Monte Carlo approaches is highlighted because truck arrivals, journey characteristics and charging requirements vary significantly in practice.

The presentation further discusses MCS station sizing and strategic siting along major freight corridors, logistics hubs, motorway service areas and ports. Particular attention is given to the implications of multi-megawatt charging hubs for distribution and transmission networks, including transformer and feeder loading, voltage variation, network congestion, power quality and available connection capacity. Mitigation options such as battery energy storage systems, renewable generation, smart charging, dynamic power sharing, reactive-power support and network reinforcement are considered.

The talk concludes by examining the principal technical, economic and regulatory barriers to large-scale MCS deployment, together with opportunities in charging infrastructure, power electronics, energy storage, renewable integration, intelligent energy management and grid-support services. Although the presentation focuses on Great Britain, the challenges and solutions discussed are relevant to many countries planning for the electrification of heavy-duty road freight.