The brake light activation requirement for cars using regenerative braking is stated in m/s² but I converted it to mph deceleration per ten seconds which is more meaningful:
≤ 15 MPH deceleration per 10 seconds - The signal must not be generated
> 15 MPH deceleration per 10 seconds - The signal may be generated
> 30 MPH deceleration per 10 seconds - The signal must be generated
That's a good starting point. Since I'm a mechanical engineer I wanted the actual acceleration figures so I looked them up. Once I had an idea what to look for it was pretty easy.
≤ 0.7 m/s² The signal shall not be generated
> than 0.7 m/s² and ≤ 1.3 m/s² The signal may be generated
> than 1.3 m/s² The signal shall be generated
For reference 9.81 m/s² is the same as 1 G of acceleration.
Your approximations in more accessible units are correct.
I have been paying close attention to this. First I noticed that using the paddles never gets more than about 1/2 way down the regen bar, but if you are in adaptive cruise control it sometimes will slow the car fairly aggressively and the regen meter goes almost all the way down to the bottom of the green bar. This suggested to me that it is possible to get more regen braking than you can get with the paddles alone. Then just yesterday I noticed that when using the brake pedal the regen meter often goes pretty deep down. So I believe that in addition to actuating your brake pads against the rotors, the brake pedal also activates a variable and potentially much higher level of regen braking than the paddles can access. Before I made this discovery I felt like I was wasting energy whenever I touched the brake pedal, but now I realize that by using the paddles and very gently touching the brake pedal I can access much more aggressive regen braking. With very careful application of the brake pedal I've almost convinced myself that I can feel a slight pedal range with increased regen braking and almost no friction braking.
The genius of Honda here is that they made the pedal feel so much like a normal brake pedal that it took me almost 3 weeks and over 1000 miles to figure out that more was going on.
This leads me to another mystery. Does anyone know what the power/regen meter on the dash actually measures? Is it linear? Is 1 cm up on the blue side about the same energy usage as 1cm down represents generation on the green side? The engineer in me is a bit offended that they gave us a big meter that apparently measures something important but there are NO UNITS on it!! It would make sense that it represents power, perhaps in kilowatts.