kemrex.de

Innovative technical solutions for Zero Emission operation of commercial trucks

The KEMREX Range Extender makes battery-electric vehicles into a practical alternative to conventional Diesel trucks

300 Kilometer range – fully loaded and without regard to topography or traffic conditions? Knapp e-Mobility makes it possible! With the current battery technology, most e-Trucks available on the market offer too little range and cannot replace a diesel truck in most application scenarios. This problem is especially prevalent in the 12 – 40 ton classes of commercial vehicles.

Our goal is to electrify this segment of heavy commercial vehicles. To achieve this end, we are fitting up e-Trucks with the KEMREX range extender – a mobile power unit that charges the HV battery while the truck is on the road. The addition of the range extender allows us to pursue a "Battery Rightsizing" strategy, saving space, weight and cost – which also improves the payload capacity of the truck.

Charging the battery – while you drive

The KEMREX mobile power unit generates electrical power and charges the HV battery while you drive – “power to go, while you go” instead of waiting for the battery to charge on a stationary charging point somewhere. With an output of 18 – 20 kW, the range extender can nearly double the capacity of the typical e-Truck battery today – and the KEMREX unit only weighs ca. 250 kg vs. 1100-1150 kg for a comparable Li-Ion battery pack. The KEMREX is designed with a diesel rotary engine for ease of use and optimal CO₂ savings. The rotary engine technology is perfectly suited for generator applications and our current focus is on the serial production of the KEMREX power unit with a diesel rotary engine.

Flexible for the future

The KEMREX design is flexible and keeps a number of options open for the future. The rotary engine can run on diesel, synthetic e-fuels and/or hydrogen. The power unit can also have a fuel cell instead of the rotary engine. In the near term, our focus is on diesel as the fuel of choice for practical operation scenarios – because diesel has clear advantages in energy density, in price, and in availability.

Our proposal for a CO₂-neutral future

The KEMREX Range Extender is designed as an integration kit for e-trucks from 12 – 40 ton total authorized weight. Hence, the REMREX range extender can be integrated as an optional equipment package or retrofitted onto existing (used) vehicles of any typical manufacturer in the market today.

We also convert conventional diesel trucks into electric vehicles with the KEMREX range extender as a turn-key complete solution. These trucks can be either new or used and, by larger fleet owners, can even be existing operative vehicles that receive a "second life" as an emission-free truck.

Get in touch!

Questions about the KEMREX power unit?
You would like some advice on how to convert your truck(s)?
You would like an individual proposal?
Don’t hesitate to reach out to us.

CONTACT