Peak efficiency is at about 40-50mph, at least for Teslas: https://forum.abetterrouteplanner.com/uploads/monthly_2018_11/Tesla_3_LR-Tesla_P3D-Tesla_S100D_effic

Peak efficiency is at about 40-50mph, at least for Teslas: https://forum.abetterrouteplanner.com/uploads/monthly_2018_11/Tesla_3_LR-Tesla_P3D-Tesla_S100D_efficiency_metric.png.78cb018e350cb4396263d576a005abb2.png https://forum.abetterrouteplanner.com/uploads/monthly_2018_1...