HV Mode question

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So you have to not only avoid braking, but also the regen paddle to prevent unwanted engine start-up after fully charging your Clarity's battery.

This is not true for every owner. Myself and several others have reported that we have made numerous trips with a fully charged battery, using both brakes and paddles, without starting engine starting.
 
However, I would not want to be in some remote area far from refueling options, relying on the displayed "optimistic" range.

Would you prefer to be in some remote location with a BEV? At least in the continental US, it’s virtually impossible to drive 300 miles without passing at least one gas station.
 
I would not want to be in some remote area far from refueling options, relying on the displayed "optimistic" range.
Maybe the range estimates tend to be optimistic, but as range is depleted, the estimates become closer to reality and ultimately converge at zero.
In other words you will never run out of gas (or electrons) while showing that miles are still available.
 
This is not true for every owner. Myself and several others have reported that we have made numerous trips with a fully charged battery, using both brakes and paddles, without starting engine starting.
I agree, it's not guaranteed the engine will start if you touch the brakes or regen paddle when the battery is fully charged. It hasn't happened to me in years. However, when it does happen to a new owner they need to know it's a design "feature," not a failure with their particular car.

I wonder if the reduced capacity of my 2017-built traction battery has any bearing on the likelihood of unintentional regen-initiated engine start-ups?
 
However, when it does happen to a new owner they need to know it's a design "feature," not a failure with their particular car.

I wonder if the reduced capacity of my 2017-built traction battery has any bearing on the likelihood of unintentional regen-initiated engine start-ups?

It is a design “feature” that in some cases “fails” to meet an owners expectations. So, while it works as designed, some owners consider it a less than brilliant solution.

With this car, it is next to impossible to pinpoint what may cause certain vehicular behavior. I may have mentioned previously, that it sometimes seems as though each of us is driving a completely different car.
 
I'd like an explanation of point #1 - how or why would regenerative braking energy start the engine. ?!?

The car uses the electric motor to slow down. This creates regenerative energy that the fully charged batteries refuse to accept. The engine starts in order to absorb this energy.

If you find this to be a mind boggling engineering decision, you are not alone.
 
One detail about the estimated range (both HV/and EV) -- it's based on actual usage. As others have noted, if you drive the same routes daily the estimates do get more accurate. However, on a recent trip to Arizona, my HV and EV range were way optimistic compared to reality and at one point almost ran out of gas. That hasn't been my general experience, but on this trip I was running the AC on the highest setting continually, and driving pretty fast (it seems everyone in AZ goes 80+). Anyway, the guess-o-meter was off by as much as 30 miles which I hadn't seen before (and is not typical). But it's a pain in the butt because the car only has a 7 gallon tank, so you are using the guessed range more than one would if they had a larger tank.
 
Much like any normal car, it is an option to use the fuel gauge or even the low fuel light, to determine when adding fuel may become necessary. At 80-ish mph the car gets about 36mpg. Set one of the trip meters at each fill up and figure on getting fuel every 200-220 miles at those speeds.
 
The Honda manual says the fuel light comes on at about 1.1 gal of gas remaining. This makes sense to me, two days ago I had only 38 estimate miles remaining and no fuel light. I do agree that fill at 200-220 is the right increment, but that's when you have say 80 or so total miles remaining-- and quite a ways from when one sees the fuel light.

I typically drive through eastern oregon, nevada/california and through tonopah, NV. Anyway, there are stretches more than 60 miles without gas in those locations. My gas guzzling Subaru, thanks to its large tank could go 400+ miles between gas stations.

Anyway, my perception of the reasonableness of the fuel light, depends on where I'm going.
 
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