hyperionmark
Posts: 41
Joined: Tue Jan 31, 2017 11:46 am
Delivery Date: 31 Jan 2017
Location: Nebraska

Charging in the Sun

Fri May 05, 2017 8:45 am

At what temp or above would you avoid (if you could) charging under full sunlight via L1 trickle charging? What about 6kw L2?
(let's assume you can't roll down or even crack the windows)

desiv
Posts: 568
Joined: Tue Jan 06, 2015 1:10 pm
Delivery Date: 04 Jan 2015
Leaf Number: 018850
Location: Lincoln City, Oregon

Re: Charging in the Sun

Fri May 05, 2017 9:41 am

Interesting question..
I wouldn't think L2 causes much heat increase, even at 6Kw...
QCs, yeah, but L2???

Not sure, but I wouldn't think it would add too much..
Now that said, if it's really really hot, that's bad for the battery and any increase would technically make it worse, but I wouldn't think it would be significantly more..

Never measured tho, so don't take my word for it.. ;-)

desiv
2012 SL - Silver

LeftieBiker
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Location: Upstate New York, US

Re: Charging in the Sun

Fri May 05, 2017 12:53 pm

You should go by the car's pack temperature, not the ambient temp. I avoid charging when 6 temp bars are showing if possible, 7 bars for sure. Some people will charge at 7 bars.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

hyperionmark
Posts: 41
Joined: Tue Jan 31, 2017 11:46 am
Delivery Date: 31 Jan 2017
Location: Nebraska

Re: Charging in the Sun

Fri May 05, 2017 2:14 pm

LeftieBiker wrote:You should go by the car's pack temperature, not the ambient temp. I avoid charging when 6 temp bars are showing if possible, 7 bars for sure. Some people will charge at 7 bars.

Sounds good. I have yet to see mine over 5, although I'm sure that will change in the summer.

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IssacZachary
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Re: Charging in the Sun

Fri May 05, 2017 2:50 pm

hyperionmark wrote:
LeftieBiker wrote:You should go by the car's pack temperature, not the ambient temp. I avoid charging when 6 temp bars are showing if possible, 7 bars for sure. Some people will charge at 7 bars.

Sounds good. I have yet to see mine over 5, although I'm sure that will change in the summer.

I finally saw 5 bars on my meter just two days ago. It goes back to 4 bars every morning though.

What's the difference in terms of damage from charging a hot battery vs. discharging (driving) a hot battery?
2013 SL, 40,000 miles, 12 bars.

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Stanton
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Re: Charging in the Sun

Fri May 05, 2017 2:52 pm

IssacZachary wrote:What's the difference in terms of damage from charging a hot battery vs. discharging (driving) a hot battery?


They're both bad, but there's not much you can do about the latter if you have to drive the car.
I generally avoid charging @7TB and above; I see 6TB all summer in Texas.
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
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2013 sun visor
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Battery Pack replaced (Rev E) @51 months and 41k miles

LeftieBiker
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Location: Upstate New York, US

Re: Charging in the Sun

Fri May 05, 2017 4:13 pm

What's the difference in terms of damage from charging a hot battery vs. discharging (driving) a hot battery?


You have some control over heating a hot pack while driving. Use D for minimum regen, and accelerate gently. I'm not sure if using the A/C while moving matters, but you should probably NOT use it while stopped.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

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IssacZachary
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Re: Charging in the Sun

Fri May 05, 2017 5:06 pm

Not that heat is much of a problem where I live, but sometimes I dream of opening the battery and running stainless steel tubing throughout the whole pack, closing it up and sealing it real tight again, and running coolant through the tubing that's cooled via a small refrigeration unit and then insulating the battery case really well so that once it's cooled down it stays cool.
2013 SL, 40,000 miles, 12 bars.

LeftieBiker
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Joined: Wed May 22, 2013 3:17 am
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Location: Upstate New York, US

Re: Charging in the Sun

Fri May 05, 2017 8:30 pm

If you ever get a new pack, that might be worth trying before it's installed. Or it would be if you lived in a hot climate, anyway...
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

RonSwanson
Posts: 33
Joined: Fri Apr 07, 2017 1:13 pm
Location: Los Angeles

Re: Charging in the Sun

Sat May 06, 2017 6:51 am

Sounds like a lot of work driving and charging this car lol

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