MCS Standard Charging Connector vs. 6 MW Alternative: The Future of Heavy-Duty EV Connectors
The Megawatt Charging System (MCS) is entering commercial service as the standard interface for ultra-fast charging of battery-electric heavy-duty trucks. However, alternative concepts are emerging that could exceed MCS capabilities or eliminate the charging connector altogether.
MCS Standard:
IEC TS 63379 published in early 2026
Operating voltages up to 1,250V, currents up to 3,000A
Peak charging power up to 3.75 MW
Manual connection with liquid-cooled cables
Uniform, cross-manufacturer standard
Alternative: akroVA 6 MW Connector:
Demonstrates power transmission of 4,000A at 1,500V (6 MW)
Uses ring-shaped contact surfaces for any orientation insertion
Designed to support 3-12 MW scalable concept
Similar use case to MCS but substantially higher power
Alternative: Fraunhofer Underbody Charging System:
Eliminates manual charging connection entirely
Truck drives over charging unit integrated into ground
Supports up to 4.5 MW at 1,250V
IEC 61851-26 compliance
Particularly suited for depot operations, ports, and autonomous vehicles
According to Dr. Sven Klausner, Head of Charging Infrastructure at Fraunhofer IVI: "Work is currently underway at the IEC level on standardising the associated charging interface(s)." A first version of the interface standard is expected in the first half of 2027.
