Mercedes-Benz has unveiled an Experimental Charging Vehicle nicknamed ELF, a mobile testbed designed to accelerate advances in ultra-fast, intelligent and sustainable EV charging.
The project brings together bidirectional, solar, inductive and high-power conductive charging in one platform, aiming to shorten stop times and improve real-world convenience while supporting lower-carbon electricity use.
ELF underpins a dual track of research.
At one end, Mercedes is probing future technology using the Megawatt Charging System (MCS), originally developed for heavy-duty transport, to stress-test batteries, power electronics and cabling at extreme loads.
In parallel, it is stretching today’s infrastructure by pushing the Combined Charging System (CCS) towards higher limits using near-series hardware.
The company said the ELF can reach up to 900kW, equivalent to adding 100kWh in about 10 minutes, in simulated highway and urban fast-charge scenarios.
The data feeds directly into upcoming models and programmes, including the CONCEPT AMG GT XX technology demonstrator. Mercedes claims the concept can recover enough energy for around 400 km (WLTP) in five minutes, sustaining an average 850 kW at 1,000 amps across much of the charging curve, and recording a 1,041 kW peak during megawatt charging.
To support those figures, Mercedes worked with Alpitronic, the European high-power charging specialist, on a prototype station used during the concept’s validation runs.
Engineers adapted an MCS unit designed for trucks by fitting a CCS cable while retaining the plug-and-cable cooling performance, enabling current delivery of up to 1,000 A over CCS—around double typical levels.
Vehicle and charger were co-developed and validated on a test bench in Stuttgart-Untertürkheim, reflecting Mercedes’ “system” approach where car and infrastructure are engineered together.
Lessons from the prototype are now being channelled into a new generation of high-performance chargers for Mercedes-Benz charging parks, with the goal of public charging times approaching conventional refuelling.
The company argued that faster, smarter charging — combined with services such as MB.CHARGE Public and renewable-matched Green Charging in Europe, Canada and the United States — would be critical to mass EV adoption.
Mercedes said it was among the first to roll out Plug & Charge in 2021 and said ELF is the next step in making charging simpler and more sustainable.
By pairing megawatt-class experimentation with production-oriented CCS development, the carmaker aims to lift real-world charging speeds for current customers while preparing its vehicles and infrastructure for the next performance plateau.
