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 Post subject: Re: How bad is DC charging ?
PostPosted: Fri Apr 13, 2018 8:30 pm 
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Posts: 1976
f1geek wrote:
. On the rare 100 mile or greater trips I take, I will then charge to 100% immediately prior to leaving so the pack spends very little time at high voltage.


/\ This... is good battery management.

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 Post subject: Re: How bad is DC charging ?
PostPosted: Sun Apr 15, 2018 12:01 am 
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Joined: Wed Apr 04, 2018 12:12 am
Posts: 13
Yesterday I fully charged battery at 12:30am
In the morning at 8 am I recognized that almost 1 bar (1/16) is gone. How is it possible ?

Another thing.
If I charge up to 100% right before using it. If should be ok for the battery?

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 Post subject: Re: How bad is DC charging ?
PostPosted: Sun Apr 15, 2018 11:39 am 
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The "loss" in SOC could be due to temperature. What was the ambient temperature at 12:30 am and 8 am? I have noticed I get more range once the battery pack warms up to around 20 to 30 C. Was it warmer at 8 am than it was at 12:30am? Otherwise, I don't think it's a big deal and probably not indicative of any problems.

Yes, for battery longevity, charge up to 100% immediately before using. If you know you need 100% at 8am, I would suggest using the charge timer to have the battery hit 100% at 7:30 am to 7:45 am so that the battery spends the least amount of time at full charge.


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 Post subject: Re: How bad is DC charging ?
PostPosted: Sun Apr 15, 2018 11:54 am 
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Joined: Wed Apr 04, 2018 12:12 am
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f1geek wrote:
The "loss" in SOC could be due to temperature. What was the ambient temperature at 12:30 am and 8 am? I have noticed I get more range once the battery pack warms up to around 20 to 30 C. Was it warmer at 8 am than it was at 12:30am? Otherwise, I don't think it's a big deal and probably not indicative of any problems.


I was thinking about difference in temperature too.The temperature at 12:30am was about 10F higher than at 8 am.

f1geek wrote:
Yes, for battery longevity, charge up to 100% immediately before using. If you know you need 100% at 8am, I would suggest using the charge timer to have the battery hit 100% at 7:30 am to 7:45 am so that the battery spends the least amount of time at full charge.


I wish I could do it. I live in apartment. But looks like if I will charge at night up to 90-100% the difference in temperature will lower the SoC.

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