I was happy to discover the EPA includes entries for EVs in the "Test Car Database" including the roll-down coefficients. This means we can plot the rolling drag power metrics as a function of mph. Using 500 W as the overhead electric load, here are the plots: Each Y-axis value is equivalent of 5 hp. These are parametric, loss-less, drag power curves at the wheel-to-road interface. I need the kW consumption at 30 mph and 60-75 mph for each model Tesla to correct the fixed overhead and efficiency loss of these curves. Normally we use benchmarks at two, different speeds to adjust for losses: tire flex losses there can be shock absorber losses on poor roads wheel bearing and CVT joint losses differential gear losses reduction gear losses from motor to differential motor losses (better for PM versus cheaper induction) inverter losses (better for silicon carbide versus silicon) typical metrics are at the input to the inverter electronics Bob Wilson
