MrDRMorgan
Posts: 1132
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Mon Jul 27, 2020 3:58 pm

ElDobro wrote:
Mon Jul 27, 2020 3:38 pm
My battery's holding at 12.4kWh, and I still don't have any issues with my range.
At my current rates of degradation, my 2014 Spark EV will hit the battery replacement threshold at 12.4 kWh and my 2016 at 11.4 kWh. The real question is will the degradation continue at the present rate, which, if it does, I will be able to make a warranty claim for each car.

Currently, GOM range is not an issue for either car. The 2014 is used for local driving. The 2016 is used mainly for local driving with some drives into the Bay Area. As long as the EA and EVgo stations continue working, I have no problems. But, recent bad charging experiences make me question how reliable the EA stations really are. EVgo almost always works.

TheLondonBroiler
Posts: 227
Joined: Tue Oct 31, 2017 6:25 am

Re: Battery degredation

Mon Jul 27, 2020 4:58 pm

ElDobro wrote:
Mon Jul 27, 2020 3:38 pm
My battery's holding at 12.4kWh, and I still don't have any issues with my range.
Dude! Yours is a 2016 too, isn't it? Regardless of whether it meets your needs or not, I think you'll be on solid ground to take advantage of the battery warranty this winter or next.
2015 Spark EV w/ DCFC 46,XXX miles
Purchased 1/20/18 w/ 16,5XX miles
0-40k mile efficiency avg - 5.3 mi/kwh

2019 Bolt EV w/ DCFC 59,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.6 mi/kwh

marcusku
Posts: 4
Joined: Sun Jul 26, 2020 4:48 pm

Re: Battery degredation

Mon Jul 27, 2020 5:57 pm

Thanks for the replies. The car will be for local driving only. My wife has a Bolt and I have a VW TDI Sportwagen for long trips. Most people would argue why I "need" it all but it pains me to start the car for only a few miles--I know it's weird.

Unfortunately I don't have the luxury of driving it beforehand because I'm in WI and there are almost no Spark EV near me. Not my first choice to buy a car solely on pictures but I figure the big ticket items are under warranty. Smaller stuff the risk will be on me.

So the battery warranty varies by year? Is 2016 not necessary the best choice? I really wanted a 2016 with the idea the battery is newer and hopefully GM worked out a few of the bugs after a couple of years.

MrDRMorgan
Posts: 1132
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Mon Jul 27, 2020 6:26 pm

marcusku wrote:
Mon Jul 27, 2020 5:57 pm
Thanks for the replies. The car will be for local driving only. My wife has a Bolt and I have a VW TDI Sportwagen for long trips. Most people would argue why I "need" it all but it pains me to start the car for only a few miles--I know it's weird.

Unfortunately I don't have the luxury of driving it beforehand because I'm in WI and there are almost no Spark EV near me. Not my first choice to buy a car solely on pictures but I figure the big ticket items are under warranty. Smaller stuff the risk will be on me.

So the battery warranty varies by year? Is 2016 not necessary the best choice? I really wanted a 2016 with the idea the battery is newer and hopefully GM worked out a few of the bugs after a couple of years.
Having had the opportunity to extensively drive all three model years, my vote for the best of the three is the 2016 Spark EV followed by the 2014 Spark EV. For some reason, the 2015 Spark EV seemed to have some problems. My 2014 and 2016 have both been trouble-free, were both purchased as used vehicles and I have no plans to part with either of them.

ElDobro
Posts: 74
Joined: Sat Aug 31, 2019 1:05 pm
Location: NJ

Re: Battery degredation

Tue Jul 28, 2020 2:42 pm

TheLondonBroiler wrote:
Mon Jul 27, 2020 4:58 pm
ElDobro wrote:
Mon Jul 27, 2020 3:38 pm
My battery's holding at 12.4kWh, and I still don't have any issues with my range.
Dude! Yours is a 2016 too, isn't it? Regardless of whether it meets your needs or not, I think you'll be on solid ground to take advantage of the battery warranty this winter or next.
2015. The car usually drops to 11.5 kWh during Winter, so I'll check in at the dealer I bought my Volt from. In NJ, there's no such thing as a Bolt dealer.

MrDRMorgan
Posts: 1132
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Tue Jul 28, 2020 4:27 pm

ElDobro wrote:
Tue Jul 28, 2020 2:42 pm
TheLondonBroiler wrote:
Mon Jul 27, 2020 4:58 pm
ElDobro wrote:
Mon Jul 27, 2020 3:38 pm
My battery's holding at 12.4kWh, and I still don't have any issues with my range.
Dude! Yours is a 2016 too, isn't it? Regardless of whether it meets your needs or not, I think you'll be on solid ground to take advantage of the battery warranty this winter or next.
2015. The car usually drops to 11.5 kWh during Winter, so I'll check in at the dealer I bought my Volt from. In NJ, there's no such thing as a Bolt dealer.
For my 2016 Spark EV: At 10,284 miles the battery capacity was 16.6 kWh. Today, at 31,229 miles, the battery capacity is 14.4 kWh. There are 125 data points in between and the plotted curve shows a constant downward trend with one "flattening out" at around 20k miles and a second flattening out starting at 29700 miles (March 2020). Overall, the battery is degrading about 1.0 kWh every 9500 miles. My current projection is I hit the warranty point when the battery capacity hits 11.4 kWh or at about 60k miles on the ODO if the present degradation rate continues. It is going to be close!

But, even with an 11.4 kwh battery capacity and my average 6.01 mi/kWh, I will still have a full charge range of about 68 miles. This still works for me even taking into consideration the summer and winter variations. I will just have to charge more often if I venture out of town - assuming working chargers are available and not spaced too far apart.

marcusku
Posts: 4
Joined: Sun Jul 26, 2020 4:48 pm

Re: Battery degredation

Thu Jul 30, 2020 5:10 pm

A Chevy dealer should be able to test the capacity of the battery shouldn't they by plugging in a diagnostic tester? I've been really getting the run around. It would be nice to know before purchasing but maybe I shouldn't worry about it since it is still under warranty.

TheLondonBroiler
Posts: 227
Joined: Tue Oct 31, 2017 6:25 am

Re: Battery degredation

Thu Jul 30, 2020 5:52 pm

marcusku wrote:
Thu Jul 30, 2020 5:10 pm
I've been really getting the run around. It would be nice to know before purchasing but maybe I shouldn't worry about it since it is still under warranty.
A dealer giving you the run around?! I don't believe it :lol: jk.

It's natural to want the most for your money and to get the best you can. Theoretically you win if it's high or low (assuming you get a new pack under warranty, which is no guarantee, rather bringing capacity to 60% or 11.4kwh, for 2016, is all that's guaranteed (it's 65% for '14 & '15)).

You can get an instant estimated capacity figure by using an obd scanner and torque pro (~$15 if you already have an android phone, and it's a really useful tool for MOST 1996 newer vehicles). Shameless self promotion, I made a video (okay, it's not that good) explaining the process of setup (which isn't particularly well done either, haha, better than nothing I guess).
https://youtu.be/LjqDk08x9EY
2015 Spark EV w/ DCFC 46,XXX miles
Purchased 1/20/18 w/ 16,5XX miles
0-40k mile efficiency avg - 5.3 mi/kwh

2019 Bolt EV w/ DCFC 59,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.6 mi/kwh

marcusku
Posts: 4
Joined: Sun Jul 26, 2020 4:48 pm

Re: Battery degredation

Sat Aug 01, 2020 8:29 am

Two dealers now have told me that they do not have a way to give me the theoretical capacity but plugging into the car's computer. So if this is true how do they determine of the battery is below the threshold?

TheLondonBroiler
Posts: 227
Joined: Tue Oct 31, 2017 6:25 am

Re: Battery degredation

Sat Aug 01, 2020 8:42 am

marcusku wrote:
Sat Aug 01, 2020 8:29 am
Two dealers now have told me that they do not have a way to give me the theoretical capacity but plugging into the car's computer. So if this is true how do they determine of the battery is below the threshold?
If they're not "Volt" or EV certified, they're allegedly not able to work on EVs or PHEVs.

Edit: In which event, they probably shouldn't sell them either... not that it would stop them from doing so.
2015 Spark EV w/ DCFC 46,XXX miles
Purchased 1/20/18 w/ 16,5XX miles
0-40k mile efficiency avg - 5.3 mi/kwh

2019 Bolt EV w/ DCFC 59,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.6 mi/kwh

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