2014 Battery Stats

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jamieo said:
If I choose to, I will post data every day. If you feel that this is information is useless crap, stop reading this thread.

I started this thread , and I’ll continue to use it regardless of what you think.

I agree. I'll post updated graph every 6 months. Tracking long term health of these batteries provides valuable information. Will the battery last 5 years? :( 10 years? :) or 15 years? :D
 
OceanBlue14 said:
jamieo said:
If I choose to, I will post data every day. If you feel that this is information is useless crap, stop reading this thread.

I started this thread , and I’ll continue to use it regardless of what you think.

I agree. I'll post updated graph every 6 months. Tracking long term health of these batteries provides valuable information. Will the battery last 5 years? :( 10 years? :) or 15 years? :D


Exactly!
 
Then change the title of this thread. This topic is about your specific vehicle in your specific climate.
Has nothing to do with 2014 fleet like title suggests.
 
January 10, 2018 AHr=57.64 SOH=88.14% 395.74V Hx=84.85% 40,112 Miles 16 QCs and 1387 L1/L2

and for comparison, the information from 1 year ago:
January 10, 2017 AHr=58.18 SOH=88% 382.46V Hx=88.05% 25,370 miles 14 QCs and 965 L1/L2s
 
jamieo said:
January 10, 2018 AHr=57.64 SOH=88.14% 395.74V Hx=84.85% 40,112 Miles 16 QCs and 1387 L1/L2

and for comparison, the information from 1 year ago:
January 10, 2017 AHr=58.18 SOH=88% 382.46V Hx=88.05% 25,370 miles 14 QCs and 965 L1/L2s
shows how useless the "SOH" readout is
 
22 Feb 2018. 2014SL. ~49000km. 100 SOH, 97.77 HX. 24 QC and 2111 L1/L2. Montreal, QC.

We got the car in late 2017 and SOH was 94%. Previous owner did mostly L2 charging. A few things that happened after getting it:

1.) we took a deep discharge until --- the first day we got it, not intentionally.
2.) the car is parked outside, and we've had some really cold days this winter (nearly a week straight of -16C or lower, hitting -25 a few times)
3.) mostly L2 charging and keeping the SOC between 20% and 80%, topping up to 100% once a week or two for a full balance.

Not sure which of the above, if any, had an effect on the rising SOH.

Will see how the health is after this summer.
 
My 2014 S lost the first bar after 53 months and 37.5k miles. AHr = 55.29, SOH 84.54, Hx 79.86. AHr is continuously dropping at ~1.5/yr rate (about 3% SOH/yr).

The car lives in a climate where temperature goes above 90F regularly during summer, but has a real winter (15-20F).
 
My comparison 3.3k km vs 25.3k km
Any feedback aprecciated

comparison%202015-2018.png
 
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