Navigation charging recommendations - oddities

[DougFrisk]

Here's what I have and why:

The General profile is set to charge to 100% with "optimized" charging.
The "Home" profile is set to timer based charging with a minimum of 25% and prefered hours between 11:00 PM and 5:00 AM when I pay $0.08/KWh.

Upshot is, if we plug in at home, the car tries to charge immediatly to 25% then waits until electricity is chaper. If we plug in anywhere else it charges to 100%

Timer 1 is set to charge to 85% with the charge being done by 5:00 AM when power costs increase. Could be set to a later time, but if it's going to take more than six hours to reach 85% it will start charging earlier rather than after 5:00.

Timer 2 is the one that pre conditions the car about the time my wife leaves for work.

You can see it working in the graph of our electric consumption when we came home with a 12% state of charge after our robotics weekend last Sunday.

You can see that we plugged in at 2:00 and the car charged to 25% and stopped. Then at about 11:00 it started charging the rest of the way to 85% finishing at 5:00 AM.

If it had been a weekday, the EVSE would have locked out the charge until 8:00 PM (we pay a surcharge between 3 PM and 8 PM M-F) so the peak for the 12% to 25% charge would have been later.

The only thing I'd like to change is that I'd like to be able to set the minimum charge for a profile to less than 25%. In theory, the EVSE and car should be capable of going from 10% to 85% in the six hour overnight window. The fact that it charged to 25% at $0.10/KWh cost me about 25 cents.

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[Murph7355]

...
The only thing I'd like to change is that I'd like to be able to set the minimum charge for a profile to less than 25%. In theory, the EVSE and car should be capable of going from 10% to 85% in the six hour overnight window. The fact that it charged to 25% at $0.10/KWh cost me about 25 cents.

I decided to have a play with my general profile to test my theory above, and it worked as expected (and similar to yours).

I'm paying 15c/kWh at our low rate and 27c/kWh high rate

 

[Novemberwhisky]

Yup, what he said. Overall I like the PCM nav system, but every once in a while the Intelligent Range Manager does some strange things and I have to turn it off. A recent example that shares your experience, on a long drive home of 265 miles, the system wanted me to stop to recharge about an hour from home. I have minimum charge at destination set to 10%. I was showing 5% upon arrival at home without charging. I decided to skip the charging stop. Here’s the catch, I wanted the nav system active so I could monitor range, but I did NOT want the system to preheat the battery for a charging stop I wasn’t going to make. I had to deactivate the range manager to do this. I arrived home with 7% and was driving very inefficiently.

Another example that happens when DC fast charging, the range manager stops the charging process because it thinks you have enough juice to make it to the destination. The trouble with this approach is that it assumes the presence of a destination charger which is not always available. Without a destination charge I like to charge well beyond the target charge so I can make it to a charger on the way back from my destination.

Yep totally agree with this. I recently did two long distance trips necessitating 3 charges each leg. It seems cumbersome to have to delete the destination to enable charging over the internet PCM calculated level.

I also found it quite frustrating to have only the SoC at destination displayed on dash I’m much more interested what my charge will be at the best charge point so I have to keep looking at the overview in navigation. Perhaps this is just my range anxiety as I’m new to EVs but if I’m a bit heavy with the right foot I would like to see how I’m doing without diving into menus.

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