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Discussion Starter · #3 ·
Good find, I had been hoping GM would share the Hummer with Marques. I wonder if this was recorded a while ago, or recently?
I would think it might have been a while ago since he specifically mentions that the two he sees are the only functional (or some other similar term if I remember correctly!) vehicles out there. But maybe not. I think the longer video done with Al Oppenheiser in there must have been several months old as he was wearing a jacket inside the car so it must have been pretty cold inside. I don’t think the ac works that great in July when the video came out! 🤪
 

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Discussion Starter · #4 ·
Or maybe Marques just doesn’t know about the many prototypes running around now. He does mention the Ford lightning which he looked at a few weeks ago. I don’t know how early they show some of the cars though…
 

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I would think it might have been a while ago since he specifically mentions that the two he sees are the only functional (or some other similar term if I remember correctly!) vehicles out there. But maybe not. I think the longer video done with Al Oppenheiser in there must have been several months old as he was wearing a jacket inside the car so it must have been pretty cold inside. I don’t think the ac works that great in July when the video came out! 🤪
Good Eye, I knew Al's video was delayed release because he mentioned they just built a batch of Hummers which we will start to see "all over", that spike in Hummer activity was in early May, so maybe that conversation with Overland Bound was recorded in March or April.

Marques also mentions the SUT is coming out "next year" which unless there is a delay, is inaccurate.
 

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I caught the “next year” comment as well. I’ve heard that on a few videos so either people are not fully educated about release dates or there is something we don’t know about. My guess is the video creators just aren’t doing their due diligence, because some of the people who attended the event in Dallas said the reps confirmed release this fall. However, they also told us Edition 1 reservation holders would start being contacted in July and here we are with no one being contacted yet. I hope there aren’t any delays that pop up.
 

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I am so excited for the Edition 1 people to get the call, and I am waiting for the EV3X (at least that's my plan.... Now if I get the call for some reason that someone gave up their Edition 1, then I might change my mind).... Anyway my rambling I just want to hear and see more news and new stuff... The whole Sea of Tranquility thing is getting a little old
 

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I am so excited for the Edition 1 people to get the call, and I am waiting for the EV3X (at least that's my plan.... Now if I get the call for some reason that someone gave up their Edition 1, then I might change my mind).... Anyway my rambling I just want to hear and see more news and new stuff... The whole Sea of Tranquility thing is getting a little old
Same here except I’m on the EV2X. I’m leaning toward bumping up to the 3X though. Waiting to see what Initial issues the edition 1’s may or may not have and how long it takes to work out those kinks. I just want to see some more new info as well!
 

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I caught the “next year” comment as well. I’ve heard that on a few videos so either people are not fully educated about release dates or there is something we don’t know about. My guess is the video creators just aren’t doing their due diligence, because some of the people who attended the event in Dallas said the reps confirmed release this fall. However, they also told us Edition 1 reservation holders would start being contacted in July and here we are with no one being contacted yet. I hope there aren’t any delays that pop up.
Ya, its mostly Tech people that have been talking about the Hummer coming out next year. When GM comes to show them the Hummer EV they introduce it as a 2022, which to tech people means coming out in 2022, but to us car people, we know that typically means released in 2nd half 2021. GM communications should do a better job clearing that up.
 

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Im not very familiar with charging rates and how it compares to other vehicles, but this guy makes it sound like the numbers were good and even specifically said it would be good for road trips. What about it isn’t good?
He even mentioned that it was only on a 150kw charger so there will be faster options available
 

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Im not very familiar with charging rates and how it compares to other vehicles, but this guy makes it sound like the numbers were good and even specifically said it would be good for road trips. What about it isn’t good?
He even mentioned that it was only on a 150kw charger so there will be faster options available
If the Hummer Ev is only charging at 53 kW at 80% I for one will be disappointed. I find it really hard to believe that is a production limit on a 200 kWh pack, because charging limits are all abut "C" rate, so the charging rate is relative to the battery capacity. Charging curve is more important that peak charging rate, here is a video so you can see some different charging curves, and what it means for charging time.

 

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OK, being an engineer I did some calculations, assuming it maintained 150KW initially, then assuming a linear taper down to 53KW at 80%. The taper would have begun at 65%. To add the 71KWH, it would have charged at 150KW for 15 minutes (37.5KWH), followed by 20 minutes during the taper (33.5KWH).
 

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OK, being an engineer I did some calculations, assuming it maintained 150KW initially, then assuming a linear taper down to 53KW at 80%. The taper would have begun at 65%. To add the 71KWH, it would have charged at 150KW for 15 minutes (37.5KWH), followed by 20 minutes during the taper (33.5KWH).
Thank you for doing the calculations, I sure hope this is not the charging curve we will get in the production model Hummer Ev. Most modern EV's charge 10-80% in less then 30 minutes. if this takes 35 minutes to go 47-80% thats not good... Another interesting thing, is they added 33% which was 71 kWh, so that says the Hummer might have around 210 kWh usable? WOW...
 

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So if they say it can get 100 miles in 10 minutes of charging do you think it just starts off at a really high charge and then tapers off quickly
Yes, Most batteries start off strong, and then taper. How fast they taper is key to a great road trip car. If you look at that video I sent you, all 4 cars have a different charging curve, and in the beginning the E-Tron fell way behind, into 4th place only to come back and win at the top end. The E-Tron charging curve is optimal for a few reasons, first being most people are nervous to run their EV down too low, so they never see the really peak part of the charging curve. If you pull into the charger at 30%, you will not see the peak rate in most EV's

In order to get GM's 100 miles in 10 minutes you likely have to be down to about 5% SOC, which on a road trip is hard to do, because charge stations are never right where you want them, and 350kW capable chargers are indeed rare.
 

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Thank you for doing the calculations, I sure hope this is not the charging curve we will get in the production model Hummer Ev. Most modern EV's charge 10-80% in less then 30 minutes. if this takes 35 minutes to go 47-80% thats not good... Another interesting thing, is they added 33% which was 71 kWh, so that says the Hummer might have around 210 kWh usable? WOW...
I noticed the >200 KWH also. Keep in mind that the charging was limited initially by the charger itself. The results will be different on a 350 KW charger when starting at lower SoC. We also have to consider that today the largest batteries out there are less than half the capacity of this one. 53KW at 80% does seem low, even my Mach E is at about 80KW, before it drops at 80%.
 
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