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I was wondering earlier today about a few things with electric cars... I assume that they use a different (electric vs heat from the combustion engine) method for heat. So do you get heat almost instantly? My daughter always wants the heat on as soon as she gets in a cold car and I have to explain it every time... Also, how much does using heat or AC affect your mileage? Again I am assuming again that the more you are using accessories, then the more you are taxing the batteries a d the less mileage you will get...
 

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I was wondering earlier today about a few things with electric cars... I assume that they use a different (electric vs heat from the combustion engine) method for heat. So do you get heat almost instantly? My daughter always wants the heat on as soon as she gets in a cold car and I have to explain it every time... Also, how much does using heat or AC affect your mileage? Again I am assuming again that the more you are using accessories, then the more you are taxing the batteries a d the less mileage you will get...

EV's heat in one of 2 ways, they either have a heat pump base HVAC system, or they have a PDC (resistive) heater and a A/C unit , Like for a home the Heat Pump is the most energy efficient in Winter, both are about the same in the summer. Your daughter will love EV's, most from the remote phone app can pre heat or cool the car in a closed garage before you get to the car. You can also pre condition the battery while plugged in so you use your house power, instead of the battery power for the pre conditioning.

EV's lose range in the winter time for various reasons, first and foremost batteries have more energy when they are warm, but also EV's do use the battery power to heat or cool the cabin and battery. I have owned GM, Tesla, and Audi EV's and I would say winter time range will vary based on the temperature, and length of trips, but I would plan for 20% less range which is about average. Short trips in winter time will show high consumption (still better than ICE cars), longer trips tend to balance out. Charging rate can also be effected by cold if the battery is not warm enough to accept a fast charge. Tesla, and I understand Hummer EV have this solved as long as you set the navigation destination for a charger, the car will condition the battery to accept the charge.
 

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This is a great question, and we will answer the technical aspects of the HummerEV after the upcoming CES show, as we are gradually talking about all of the great things we are introducing with the HummerEV. We have an all new patent-pending HVAC system that will make very efficient use of the heat generated by the battery - but as I say - we will get you a detailed explanation shortly. In the mean time, the gentleman above (Tom E-Tron) is correct in saying that your daughter will be happy to know you can use your mobile device to precondition the vehicle, or set up a schedule ahead of time, to make sure the cabin is exactly as warm (or as cool) as she would like it to be. Stay tuned!!

Al Oppenheiser - HummerEV Chief Engineer
 

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Hey @Aloppen, thanks for the response.

Kind of off topic, but if you could give some insight for the CES. I had two quick questions.

First, is there any way the commoners like us can attend the event, since it's virtual? It seemed like you needed certain credentials to get in, but with the recent GM at CES presentation news, now we all want to get in haha.

And second, being a part of the GM EV team...is there any chance whatsoever that we get even a slight peak at the upcoming Cadillac Celestiq in the presentation? Other than the Hummer, that thing has been my most anticipated EV coming from GM.

Any help you could give would be appreciated!
 

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This is a great question, and we will answer the technical aspects of the HummerEV after the upcoming CES show, as we are gradually talking about all of the great things we are introducing with the HummerEV. We have an all new patent-pending HVAC system that will make very efficient use of the heat generated by the battery - but as I say - we will get you a detailed explanation shortly. In the mean time, the gentleman above (Tom E-Tron) is correct in saying that your daughter will be happy to know you can use your mobile device to precondition the vehicle, or set up a schedule ahead of time, to make sure the cabin is exactly as warm (or as cool) as she would like it to be. Stay tuned!!

Al Oppenheiser - HummerEV Chief Engineer
Thank you for chiming in, I am excited to hear about the new HVAC system. This is one of the areas where winter efficiency can be hacked if you are able to optimally share heat energy between the battery, motors, power electronics, and interior, and the Hummer EV having such a large interior area, and so much glass, I was hoping you guys would do something different then the HVAC system from the Bolt.
 

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Hey @Aloppen, thanks for the response.

Kind of off topic, but if you could give some insight for the CES. I had two quick questions.

First, is there any way the commoners like us can attend the event, since it's virtual? It seemed like you needed certain credentials to get in, but with the recent GM at CES presentation news, now we all want to get in haha.

And second, being a part of the GM EV team...is there any chance whatsoever that we get even a slight peak at the upcoming Cadillac Celestiq in the presentation? Other than the Hummer, that thing has been my most anticipated EV coming from GM.

Any help you could give would be appreciated!
has the info you need to participate without CES registration.
 
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