gpsman
Posts: 522
Joined: Thu Oct 20, 2016 9:10 pm

2020 owners!

Thu Jan 09, 2020 7:57 am

Any 2020 owners out there?

I'm interested to hear your DCFC experiences.

I have read elsewhere the max. DCFC rate is still 55 kw but it now charges at high rate at much colder temperatures, and maybe, just maybe for a wider swath of battery state of charge range. Chevy advertised 1.5 times faster charging in cold weather and 1.1 times faster charging in mild weather.

I see a reduction in charge speed at 60 degrees so 2020 may have more advantages then people realize. Anyone try it yet? Would love to see a new charge curve and where the step downs are for 2020. My 3 year lease is up soon on my 2017.

Also you probably heard the battery is 10% more capacity (66 kWh vs 60 kWh now) yet weighs about 15 pounds less.

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hodad66
Posts: 69
Joined: Thu Jun 25, 2015 8:49 pm
Location: Indialantic, Fl
Contact: Website

Re: 2020 owners!

Fri Jan 24, 2020 12:20 pm

Just leased a new 2020 LT but no DC charging yet.
2nd Bolt lease, 2020 LT

gpsman
Posts: 522
Joined: Thu Oct 20, 2016 9:10 pm

Re: 2020 owners!

Mon Jan 27, 2020 9:33 pm

I'm doing my first DCFC in my 2020 now.

I have noticed on a 58-60 degree day it is not stair stepping down on the charge rate. It has been a slow continuous taper down in charge rate. Started at 35% battery and 44kw charge rate and it has been a slow taper down. Now at 85% charge and 20 kw charge rate.

35% to 81% in 60 minutes and 30.05 kWh added.

19 kW charge rate at 90%
18 kW charge rate at 91%
17 kW charge at 93%.
16 kw charge at 95%
16 kw charge at 96%
16 kw charge at 97%
14 kw charge at 98%
12 kw charge at 98.5% (interpolated)
10 kw charge at 99%
8 kw for 2-3 minutes.
7 kw read-out says 100% on Chargepoint and FULL on My Chevy App
6 kw continues for 3 minutes
5 kw continues for 3 minutes
4 kw continues for 6 minutes
Done.

3 miles added to range in last 12 minutes past "FULL / 100%"
Last edited by gpsman on Fri Jan 31, 2020 10:34 pm, edited 5 times in total.

GetOffYourGas
Posts: 1159
Joined: Tue Oct 20, 2015 5:25 pm
Location: Syracuse, NY

Re: 2020 owners!

Tue Jan 28, 2020 7:16 pm

gpsman wrote:I'm doing my first DCFC in my 2020 now.

I have noticed on a 58-60 degree day it is not stair stepping down on the charge rate. It has been a slow continuous taper down in charge rate. Started at 35% battery and 44kw charge rate and it has been a slow taper down. Now at 85% charge and 20 kw charge rate.

35% to 81% in 60 minutes and 30.05 kWh added.

19 kW charge rate at 90%
18 kW charge rate at 91%
17 kW charge at 93%.
Then I had to go.


That's very interesting, thanks for sharing! I've often wondered why Chevy implemented a staircase taper profile rather than a more typical constant-voltage taper. Interesting that it looks like they fixed that on the 2020. I wonder how much difference it makes in practice, though.

I'm still eagerly waiting for someone to come up with plots of the profile.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV (traded for Bolt)
2015 C-Max Energi (302A package)
2017 Bolt Premier

marspilgrim
Posts: 60
Joined: Tue Jul 30, 2019 10:13 pm
Location: Chicago

Re: 2020 owners!

Tue Jan 28, 2020 10:24 pm

Did they do anything about the thinly padded seats that is the #1 complaint of owners? It's pretty much mentioned in every single review of the car since it came out, and is likely to continue to effect sales.
2017 Bolt EV Premier

gpsman
Posts: 522
Joined: Thu Oct 20, 2016 9:10 pm

Re: 2020 owners!

Wed Jan 29, 2020 3:24 pm

Seats as far as I can tell (Fabric / LT) are exactly the same.

Oh I also noticed on that 50-60 degree day (about 58 - 60 at time of charging (noon) but the battery could have been a tad colder) it was adding heat from the DCFC for battery conditioning because I could hear all the fluids moving around while cabin climate control was set to off. And it wasn't cooling the battery because it did this in the first minute and was only drawing 43-44 kW at the peak. In my 2017 I could hear the fluids start moving about 20 to 30 minutes into a 50kw DCFC.

The Pedestrian Warning sound is louder and increases with speed up to 24/25 MPH and there is a speaker at the rear used only when in R. Also when you shift to P the sounds gradually fade away vs. be instant off. I can hear the sounds on the freeway in slow n go traffic surrounded by gassers so at first I thought I had "trouble under the hood". Seems way overkill so I'll be looking for a way to mute this vs. pull the fuse since it has some value in parking lots. How about an interrupt switch on the dash that resets after 5 minutes, and with every "key" cycle so you won't accidentally leave it off for long term?

But the "charge level target" feature is nice where you can stop charging at anywhere between 40% and 100% vs. a fixed "hilltop reserve" and it projects how many miles you will get from that partial charge. Did 2019's do that?

gpsman
Posts: 522
Joined: Thu Oct 20, 2016 9:10 pm

Re: 2020 owners!

Wed Jan 29, 2020 6:45 pm

Another "bad" change. (Not sure what year this change happened.)

In my 2017 you could press the fan speed button repeatedly and the speed would decrease .... 3, 2, 1, 0 with zero being off.

In the 2020 the fan speed stops at 1.
There is no way to turn off the fan via button.
Only touch screen.
I do not view this as an improvement. Why????

arthurmartineau
Posts: 1
Joined: Tue Feb 04, 2020 3:42 am

Re: 2020 owners!

Tue Feb 04, 2020 3:58 am

gpsman wrote:Any 2020 owners out there?

I'm interested to hear your DCFC experiences.


Hi This is my first post, but my 2nd EV. I also own a MB B250. This post is for a 2020 Bolt Premier, Black.

I fast charged over the weekend. It was my first time using a DCFC, it was pouring rain, and the card reader wouldn't work on the EA charger, so I was pretty wet by the time I was done. I did get the app to work and was able to start the 350kw charger. It was 51 degrees. I could not see the charger screen through the rain but this is what I know.

I went from 18% to 73% in 49 minutes. I added 37kw (delivered) to the battery for $13. The max rate was 54.61 kw, it started at 52-53 kw. It appears the battery went up by 36kwh. I averaged 45kw and there were no big step downs.

gpsman
Posts: 522
Joined: Thu Oct 20, 2016 9:10 pm

Re: 2020 owners!

Wed Feb 05, 2020 10:13 pm

Thanks. Looks like keeping the battery low is the best method to save time at a DCFC. Lower end speed of charge looks better than the 2017 model year. But the top end of charging is as slow or maybe slower than before.

Darn. I'm sure these decisions are made for good reason.

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Arob216
Posts: 25
Joined: Tue Apr 10, 2018 6:46 pm
Location: Colorado

Re: 2020 owners!

Sat Mar 07, 2020 4:25 am

Just saw a post on Reddit that bulletin 20-NA-053 - DC Fast Charge Robustness Improvements has been issued for 2017-2019 Bolts the enable the 2020 DCFC charging curve to be applied to all models.

I assume there is a cost for the service, but the improvements seem worth it. Has anyone with an older model had this done?
2018 Chevy Bolt Premiere, Nightfall Gray

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