Germany’s Liebherr and Designwerk have developed the first fully electric concrete mixer trucks with 10- or 12-m³ drums on a five-axle chassis.

The models are scheduled to premier later this year in Holcim and KIBAG fleets in Switzerland, where five-axle mixers with 40-tonne GVW are legal.The ETM 1005 and 1205 truck mixers bear on a Designworks Futuricum chassis. With equivalent 680 hp, they can transport large quantities of concrete quietly and reliably without diesel exhaust emissions.

An all-electric solution is particularly well suited for truck mixers, Liebherr notes: Vehicles return again and again to power infrastructure at the ready mixed plant, with battery charging typically an overnight process.The electrified Generation 05 mixer body boasts a low net weight combined with optimal transport volume; long service life thanks to special wear-resistant steel construction; and, ergonomic design around the operation system and access points.

A compact electric drive is flanged directly to the mixer drum; its high efficiency ensures that power consumption for relieving the traction battery remains low. Developed by Liebherr and ZF, the drive combines an efficient, low-maintenance electric motor and mixer gearbox package. It operates free of hydraulic equipment—no hose connections nor pump, no leakage risk.