ICE start due to Regen when HV battery near full charge..

Robert_Alabama

Well-Known Member
The post by @coutinpe about ICE running made me realize that I haven't seen this in a very long while, maybe years....
Has anyone else noticed with an aging Clarity that this annoyance has gone away? My Clarity is a 2018 with almost 75k miles and has about 42 Ah capacity on the battery. For the first few years of owning the car, this was the really the only complaint I had for the operation of the car.
 
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Mine is also a 2018 with about 72,000 miles. When it was new and had a fully charged battery even a small amount of regen, like anything but very gently braking at the stoplight at the end of a gentle downslope near my house, would frequently trigger the gas engine. I have noticed that this same location never does that anymore, even when I brake much harder at the light.
 
Removing this annoying feature of the car seems to be one of the benefits of degrading the battery somewhat. Nice to get a good side effect of losing a few EV miles.
 
In 4 1/2 years the ICE in our Clarity was never triggered by regen with a fully charged battery. I did not micromanage charging. It was always just fully charged with a “dumb” L1 or L2 EVSE. From what others have described it seems like the ICE should have started, given that we regularly descended a 1/2 mile hill with an 8.8% average grade at the end of our driveway which was also downhill with the steepest part just before the road. Near the bottom of the hill was a sharp right turn that required moderate braking. Typically, we would slow from 50-55mph to 35-40mph. On some occasions I would use the paddles to set regen at max (4 chevrons) in order to control speed and minimize braking effort. This was done hundreds of times. The engine never ran.

Not to worry, as the car had other annoying features. My solution to avoid the annoying features of these vehicles (PHEV’s) that I once believed to be the ideal vehicle, is to not own one.
 
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