Technically there is probably a slight efficiency curve with regenerative brakes because there's still a lot of heat loss that's proportional to power transfer, even if it doesn't come from friction. I think the "color circle" turns yellow a bit prematurely; you're still pumping nearly 50 kW into the battery at 45 MPH, which is pretty high on the charge rate spectrum. I ignore the color circle when I'm regenning.
When you hit the brake, of course, it's going to start blending a little bit of friction brakes in before it hits the maximum regen force so that the transition is linear, so it does make sense in that situation.
I have a feeling it's based more on acceleration/deceleration rate than power consumption/generation rate, but it's probably a combination of both.
When you hit the brake, of course, it's going to start blending a little bit of friction brakes in before it hits the maximum regen force so that the transition is linear, so it does make sense in that situation.
I have a feeling it's based more on acceleration/deceleration rate than power consumption/generation rate, but it's probably a combination of both.