Yes, that is normal. Lets imagine you lived in CO, as you drive down from Pikes Peak, you are charging the battery, using the motors to slow the car, and harvesting that power. Once the battery is 'full' all 8 bars, your regen brakes quits working. So to keep you safe, the computers leave room for some serious downhill regen. Now sadly for this mental demonstration, you really live in FL. There are no long downhills, there are no short downhills, there is only flat. So for you to fill the battery, imagine this: You are doing 112 MPH on the Daytona Speedway and you slowly decelerate to 0 using only regen. That would fill your top two bars, but just is not an every day experience. If Hell freezes over and some cold spreads to FL, you could run the heater long enough to get 8 bars, but that also seems unlikely.
