Doubling the voltage: What 800 V architecture really changes in EVs

For more than a decade, most electric vehicles have shared the same electrical backbone: a battery pack operating at roughly 400 V. It’s the invisible standard behind everything from early compliance cars to today’s bestselling EVs. But over the past few years, a growing number of automakers have doubled that number, moving to 800 V architectures and promising dramatically faster charging, better performance, and improved efficiency.

Cars like the Porsche Taycan and Hyundai Ioniq 5 helped push 800 V into the mainstream conversation...