Rivian stuck with 400-volt battery architecture for the R2 to save costs but that hasn't weakened its ability to charge quickly at all, thanks to 600-amps.

Out of Spec tested the Rivian R2 against a Tesla Model Y Performance and found it used 18-26% more energy, despite identical EPA efficiency ratings.

Rivian stuck with 400-volt battery architecture for the R2 to save costs but that hasn't weakened its ability to charge quickly at all, thanks to 600-amps.