Xiaomi SU7 Aluminum Wiring Harness Cost Cutting Clarified
Q: Why is the wiring harness of Xiaomi SU7 made of aluminum instead of copper? Is it “cost cutting”?
A: Currently, most automakers utilize aluminum conductors for charging wiring harnesses, and Xiaomi SU7 adopts this approach. Aluminum conductors match copper in performance and safety, differing only in conductivity; however, equivalent current-carrying capacity is achieved by adjusting cross-sectional area. Additionally, aluminum offers unique advantages like lightweighting—aluminum wires are 30% lighter than copper. Thus, for electric vehicles, driven by range and fast-charging priorities, the shift to aluminum is an industry-wide trend, rendering cost-cutting claims entirely baseless.