Charging with the car 'on'?

[mnx]

The Roadster actually diverts the HVAC output according to thermal control limits; that's why stopping at long traffic lights is such a PITA in the Florida summer. Model S has two compressors, one for the cabin and one for the powertrain so it's not diverting HVAC output back and forth.

OT, the Roadster HVAC could never manage cabin and powertrain temperatures simultaneously; in theory Model S HVAC(s) could.

OT: "We just completed our hot weather endurance testing, we had the Model S out in Death Valley. [During] the hottest portion of the day, we wanted to see if the Model S could maintain cabin temperature while going at 70 mph up an incline in Death Valley. Yes it can. I'll tell you what couldn't: the tow truck that we brought.

Read more: http://www.automobilemag.com/features/news/1208_q_and_a_elon_musk_ceo_tesla/viewall.html#ixzz246GUm6OA"

[jerry33]

Of course, the real question is: How much longer will it take to charge? 5 minutes? 15 minutes? 30 minutes? If you're on a trip and charging at an RV park for 8 hours (240 miles worth of charging) that's not going to impact your arrival time significantly.

[doug]

How would you do that?

The charger is delivering X amps which goes into the battery. But if you dray Y amps for running the car you're charge will be: X - Y = charge

That's fine. What I meant is skipping charge/discharge in the battery.

[markwj]

Of course, the real question is: How much longer will it take to charge? 5 minutes? 15 minutes? 30 minutes? If you're on a trip and charging at an RV park for 8 hours (240 miles worth of charging) that's not going to impact your arrival time significantly.

HVAC in the roadster is somewhere around 1 to 2 kW (educated guess). Heater probably less,

So, it depends what voltage and current you are charging at. 240V 32A is 7.68kW, so expect perhaps 13% to 26% for cooling. Estimates include conversion losses. At 220V/13A it is brutal, and unworkable at 110V/10A.

You might be more comfortable, but will end up staying longer.

[4sevens.com]

I'm curious about the answer to this question for another reason - said there is a need to make a 1000+ mile road trip. What the possibility of putting a generator in the frunk just for the road trip - so the generator is running all the time supplying power to the car... charging or supply power to the powertrain....

[TEG]

FWIW, I can turn the Nissan LEAF "on" (but it stays locked in park) while charging.
I have sat in the car using the A/C & radio while quick charging.

[Robert.Boston]

I'm curious about the answer to this question for another reason - said there is a need to make a 1000+ mile road trip. What the possibility of putting a generator in the frunk just for the road trip - so the generator is running all the time supplying power to the car... charging or supply power to the powertrain....

My lightly informed guess is that there's a difference between drawing current for auxiliary loads like HVAC vs driving the car. Putting a generator in the frunk generally seems like a seriously bad idea, considering the intake and exhaust issues. See "Fisker Fires".

[chmod a+wrx]

OT: "We just completed our hot weather endurance testing, we had the Model S out in Death Valley. [During] the hottest portion of the day, we wanted to see if the Model S could maintain cabin temperature while going at 70 mph up an incline in Death Valley. Yes it can. I'll tell you what couldn't: the tow truck that we brought.

Read more: http://www.automobilemag.com/features/news/1208_q_and_a_elon_musk_ceo_tesla/viewall.html#ixzz246GUm6OA"

Nice article.


Thanks for posting!

[4sevens.com]

My lightly informed guess is that there's a difference between drawing current for auxiliary loads like HVAC vs driving the car. Putting a generator in the frunk generally seems like a seriously bad idea, considering the intake and exhaust issues. See "Fisker Fires".

I'm just thinking about long distance enduro situations... maybe not the frunk... maybe the generator towed behind the car...

[elecblue]

Good thoughts everyone - so how would I post the Q on the FAQ blog?

Thanks!