Clear View of Hummer EV charging (with screenshot)

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Tom E-Tron

· #2 · Nov 29, 2021

Nebula1701 said:
Clear view of charger LCD while the Hummer is charging at a 350 kW EA station.

View attachment 1407

156 kW at 67% is not bad, not great.. Wish we could see the entire curve....

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azbill

· #3 · Nov 29, 2021

So from 23% to 67% was an average charge rate of 235kW. So it had to have started at over 300kW. And it added about 145 miles in that 25 minutes.

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azbill

· #4 · Nov 29, 2021

Tom E-Tron said:
156 kW at 67% is not bad, not great.. Wish we could see the entire curve....

I saw another screen shot at 90% it was still at 142kW, but that was for a completely different charging session.

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Tom E-Tron

· #5 · Nov 29, 2021

azbill said:
I saw another screen shot at 90% it was still at 142kW, but that was for a completely different charging session.

The driver in the video says it drops to 23kW at 80%, which is awful, Mach E like... We really need to see a 10-90% charge session, to really draw meaningful conclusions. E-Tron charges 10-90% in 29 minutes.

Also in this video it shows 98kWh dispensed, which means about 85 kWh into the battery, when you account for charging losses.

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azbill

· #6 · Nov 29, 2021

Tom E-Tron said:
The driver in the video says it drops to 23kW at 80%, which is awful, Mach E like... We really need to see a 10-90% charge session, to really draw meaningful conclusions. E-Tron charges 10-90% in 29 minutes.

Also in this video it shows 98kWh dispensed, which means about 85 kWh into the battery, when you account for charging losses.

I did not trust what that driver stated, I saw another photo with the rate much higher at 90%. Actually 44% of battery is 88kW, so 10kW charging loss, similar to what Lucid was seeing. Your E-Tron is adding 160 miles in 29 minutes, so the Hummer is close to that, even though it is much less efficient. My Mach E can get 225 miles of range at 70-75 mph when charged to just 80%.

Mach E charging curve is being updated, I expect to get that change next month, when I get a recall done on my windshield and glass roof. A few people have it already, but for some reason they are having dealers do the software update, instead of via OTA. Ford seems to have issues with the OTA updates, my car got all three so far, with no issues installing them. Some others with cars older than mine have received none, and some people have had their cars fail to install the latest update, even after several tries. Blue Cruise is supposed to be done via OTA and that has been delayed into next year.

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d0wnshift

· #7 · Nov 29, 2021

Maybe it's because i'm new to EVs but isn't one of the purposes is saving money on gas? That $41 bill on half a charge is very disconcerting to me.

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Nebula1701

Discussion Starter · #8 · Nov 29, 2021

d0wnshift said:
Maybe it's because i'm new to EVs but isn't one of the purposes is saving money on gas? That $41 bill on half a charge is very disconcerting to me.

In Michigan the EA price is as follows:
Guest and Pass members are charged $0.43 per kWh (reflective on what we see in the video)
If you were a Pass+ member it would be $0.31 per kWh

It's different per state because of electricity costs and local laws, you can lookup the pricing for your location here:

Pricing and Plans for EV Charging | Electrify America

Electrify America aims to keep prices low while providing more electric vehicle chargers, with faster speeds, in better locations across the U.S. Learn about our pricing.

www.electrifyamerica.com

For most trips, which will be local, you will be charging from home and that is far more cost effective and you will save a lot compared to these fast chargers or vs a pump.

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d0wnshift

· #9 · Nov 29, 2021

Nebula1701 said:
In Michigan the EA price is as follows:
Guest and Pass members are charged $0.43 per kWh (reflective on what we see in the video)
If you were a Pass+ member it would be $0.31 per kWh

It's different per state because of electricity costs and local laws, you can lookup the pricing for your location here:

Pricing and Plans for EV Charging | Electrify America

Electrify America aims to keep prices low while providing more electric vehicle chargers, with faster speeds, in better locations across the U.S. Learn about our pricing.

www.electrifyamerica.com

Yikes i had no idea. That's ridiculously high. So in order to fill up from empty will take over $80 and at least an hour of time. I understand i won't be using these chargers daily but that just seems ridiculous at those rates.

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Tom E-Tron

· #10 · Nov 29, 2021

azbill said:
I did not trust what that driver stated, I saw another photo with the rate much higher at 90%. Actually 44% of battery is 88kW, so 10kW charging loss, similar to what Lucid was seeing. Your E-Tron is adding 160 miles in 29 minutes, so the Hummer is close to that, even though it is much less efficient. My Mach E can get 225 miles of range at 70-75 mph when charged to just 80%.

Mach E charging curve is being updated, I expect to get that change next month, when I get a recall done on my windshield and glass roof. A few people have it already, but for some reason they are having dealers do the software update, instead of via OTA. Ford seems to have issues with the OTA updates, my car got all three so far, with no issues installing them. Some others with cars older than mine have received none, and some people have had their cars fail to install the latest update, even after several tries. Blue Cruise is supposed to be done via OTA and that has been delayed into next year.

We will have to wait and see in the real world on the Hummer charging curve, and what has to be done to achieve that curve, does it coldgate? Does it overheat charging in AZ, all this remains to be determined.

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Tom E-Tron

· #11 · Nov 29, 2021

d0wnshift said:
Yikes i had no idea. That's ridiculously high. So in order to fill up from empty will take over $80 and at least an hour of time. I understand i won't be using these chargers daily but that just seems ridiculous at those rates.

Hummer EV will cost more than a diesel to take on a road trip, and be slow, charging stops every 200 miles for an hour each.

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azbill

· #12 · Nov 29, 2021 (Edited)

Tom E-Tron said:
We will have to wait and see in the real world on the Hummer charging curve, and what has to be done to achieve that curve, does it coldgate? Does it overheat charging in AZ, all this remains to be determined.

I listened to a part of the driver discussion again, and he stated "it will go down to 23kW", but he never stated 80% in that statement. I think he meant that it would be down to 23kW at the end, not at 80%. I believe GM has stated the Hummer and Lyric will charge at up to 19kW on L2, so slowing down to 23kW at the end makes more sense.

The driver also made some other inaccurate comments, at one point he stated it had 4 batteries, then with it at 72% charge in 30 minutes, he said it would take 1 hour to get to 80%. Again I think he may have meant to get fully charged.

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Tom E-Tron

· #13 · Nov 29, 2021

azbill said:
I listened to a part of the driver discussion again, and he stated "it will go down to 23kW", but he never stated 80% in that statement. I think he meant that it would be down to 23kW at the end, not at 80%. I believe GM has stated the Hummer and Lyric will charge at up to 19kW on L2, so slowing down to 23kW at the end makes more sense.

The Initial Hummer EV does not have that 19.2kW charger

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azbill

· #14 · Nov 29, 2021

Tom E-Tron said:
The Initial Hummer EV does not have that 19.2kW charger

My Bolt only has a 7kW onboard charger but it charges at 16kW at 95% and 10kW at 98% on a DFDC. If you consider the drivers statement of needing to charge for another 30 minutes to finish from 72%, he would need to add another 56kWh in that 30 minutes to reach 100%. That is an average of 112kW, plus 10% loss would be an average charge rate of 124kW, so there is no way it slows down to 23kW at 80%.

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