Ferrari, BMW, Tesla and a number of Chinese automakers are gradually replacing copper wiring in their cars with aluminum, a shift that helps cut production costs and weight, according to Reuters.
The main driver behind the transition is the sharp rise in copper prices. Demand for the metal is high not only in the auto industry but also among companies building data centers, power grids and other infrastructure.
Why aluminum
Aluminum is inferior to copper in electrical conductivity, which means cables have to be thicker. From that angle, the switch might seem like a step backward. However, aluminum has two key advantages: it’s roughly four times cheaper than copper and significantly lighter, which matters especially for EVs.
Who is already using aluminum wiring?
According to Reuters, Tesla uses aluminum cables in the Model Y and Cybertruck; Ferrari uses them in its hybrids and its first electric vehicle, the Luce; BMW has used such cables since 2011 and is expanding their use. Several Chinese automakers are making the switch as well.
Will this make cars worse?
Automakers say the switch doesn’t compromise quality compared to copper-wired vehicles, since properly designed aluminum cables can deliver the necessary reliability and safety.
In short, the auto industry is working to balance cost, vehicle weight and material performance. If the shift to aluminum wiring becomes widespread, it could help make electric vehicles more affordable.
