So far it has participated at the EducEco Challenge in Colomiers, France and the Shell Eco-marathon Europe. It has shown its reliability and efficiency at both competitions successfully. At the EducEco it finished all test and competition runs and at the Shell Eco-marathon it finished all test and 3 out of 4 competition runs.

eLi15 was modified for the EducEco competition due to differences in the regulations. At the EducEco the battery of eLi15 was supported by silicon solar panels, while we used Gallium-Arsenic at the Shell Eco-marathon. Even the motor controller was different. We tuned our motor controller from the previous seasons for the EducEco and developed our own for the Shell Eco-marathon.


The Technical Features of the Vehicle

Key Data

Mass (ready to drive) in kg
Design speed in km/h

Monocoque made from carbon fibre reinforced plastic (CFRP)

Propelled by an electromotor

Energy provided by LiPo batteries and solar cell

Power Train

Lithium-Polymer batteries as energy storage

Solar cells as secondary energy source

Battery management system

Specifically designed electric motor

Chain transmission

Self-developed motor controller

Communication via CAN-Bus 

Nominal power in W
Power consumption while maintaining on flat surface in km/h and W


CFK Tooling of all parts using the VAP process

Chassis parts manufactured with prepreg technology


  • Integral design for enhanced stability
  • Weight without attachement parts 7 kg
  • Aerodynamicyally optimized shape

17 mm aluminium honeycomb as sandwich material

Top cover-monocoque: conic flange as connecting element

Top cover: flange connects to monocoque; embedded solar cells

Crossbeam: self-supporting, aerodynamically neutral airfoil

Windshield: 3D formed PMMA

All attachements made of CFRP 

Suspension System

3 wheels for reduced rolling friction

Axles adjustable in all dimensions

Space saving, precise front axle steering based on bowden wires

Specifically designed kinematics of the front axle for reduced rolling friction and optimal handling while cornering

Hydraulic disc brakes