Megawatt Charging Passes Winter Test

750kW trial in Sweden shows high-power charging can run reliably in sub-zero conditions for heavy trucks 

20 Feb 2026

Europe’s push to electrify long-haul freight has cleared a key winter hurdle after a megawatt charging system delivered stable high-power performance in sub-zero conditions in Sweden.

An electric truck from MAN Truck & Bus charged at up to 750 kilowatts using equipment supplied by Finland-based Kempower. The trial was designed to test whether ultra-fast charging can operate reliably outside laboratory settings, particularly in freezing weather that can disrupt battery systems and power electronics.

During the test, the charger maintained stable communication with the vehicle and sustained high output without interruption, despite temperatures below zero. Cold weather typically slows battery charging and increases strain on components, making winter performance a critical measure for heavy-duty electric transport.

For fleet operators in northern Europe, charging reliability is closely tied to operating costs and delivery schedules. Any significant drop in charging speed during winter months can extend downtime and reduce vehicle utilisation. Demonstrating consistent high-power output under real-world conditions provides clearer evidence for logistics groups assessing electric trucks for long-distance routes.

The trial also signals the gradual shift of megawatt charging systems from controlled pilot projects to field deployment. Industry participants are increasingly testing equipment in conditions that reflect daily freight operations, gathering data on durability, system integration and performance in harsh climates.

However, scaling the technology presents further challenges. Supplying several heavy trucks simultaneously at very high power levels will require grid upgrades, careful site planning and energy management systems to avoid network strain. Equipment installed in remote or cold regions will also need continued monitoring to ensure long-term resilience.

Even so, the Swedish trial marks incremental progress. As charging systems prove capable of operating year-round, confidence in electric long-haul transport is likely to strengthen, particularly in markets where winter conditions were once seen as a significant barrier to adoption.