drew
Posts: 2
Joined: Sun Jan 26, 2020 9:04 pm

Re: Battery degredation

Mon Jan 27, 2020 7:56 pm

No problem. I agree it would be helpful if folks who have the information could share where they are at in terms of mileage and battery capacity.

Just a quick correction though: I'm actually at 39,397 miles and my capacity per Torque Pro and the Bolt PIDs is 14.7.

I should also note that I am a heavy user of DC Fast charging as I live in the central city without a garage. I commute about 40 miles round trip into the suburbs 5 days a week. So, i would say I use fast charging about 3 to 4 times a week. I try and use free level 1 charging provided by employer as much as possible, but with only 5 outlets the competition is fierce. I know this should severely impact the battery so am really hoping GM honors their warranty. I am in California and believe the warranty is mandated to 10 years. Fingers crossed.

MrDRMorgan
Posts: 1112
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Mon Jan 27, 2020 8:58 pm

drew wrote:
Mon Jan 27, 2020 7:56 pm
No problem. I agree it would be helpful if folks who have the information could share where they are at in terms of mileage and battery capacity.

Just a quick correction though: I'm actually at 39,397 miles and my capacity per Torque Pro and the Bolt PIDs is 14.7.

I should also note that I am a heavy user of DC Fast charging as I live in the central city without a garage. I commute about 40 miles round trip into the suburbs 5 days a week. So, i would say I use fast charging about 3 to 4 times a week. I try and use free level 1 charging provided by employer as much as possible, but with only 5 outlets the competition is fierce. I know this should severely impact the battery so am really hoping GM honors their warranty. I am in California and believe the warranty is mandated to 10 years. Fingers crossed.
I know nothing about California having a different warranty than that offered by GM. But, the product specification for the 2014 Spark EV states the battery is 21 kWh. The warranty is for 8 years or 35% degradation. If the battery degrades 35%, it will have 13.6 kWh left. If my degradation trendline continues as it has so far, I will hit that limit at about 29k miles or in about 2 more years at my current driving rate. My battery warranty will end on 4 April 2022 (8 years from when the car was first registered. I am the second owner.

TheLondonBroiler
Posts: 200
Joined: Tue Oct 31, 2017 6:25 am

Re: Battery degredation

Tue Jan 28, 2020 4:43 pm

Last I checked, my 2015 is still @ 14.0 via Torque Pro. Very interesting use case, as I don't drive it but once every 2-3 months, and degradation has slowed/stopped since.
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 57,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.6 mi/kwh

MrDRMorgan
Posts: 1112
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Tue Jan 28, 2020 6:40 pm

TheLondonBroiler wrote:
Tue Jan 28, 2020 4:43 pm
Last I checked, my 2015 is still @ 14.0 via Torque Pro. Very interesting use case, as I don't drive it but once every 2-3 months, and degradation has slowed/stopped since.
How many miles do you currently have on your 2015?

TheLondonBroiler
Posts: 200
Joined: Tue Oct 31, 2017 6:25 am

Re: Battery degredation

Tue Jan 28, 2020 8:08 pm

MrDRMorgan wrote:
Tue Jan 28, 2020 6:40 pm
How many miles do you currently have on your 2015?
Approx 46,000. My Bolt it catching up with 42,XXX.... The Bolt has no noticeable degradation. Unfortunately torque pro gives a nonsense number for bat capacity, as GM/LG apparently changed something to do with the PID or calculation, when they went to the 66kwh pack (from 60kwh).
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 57,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.6 mi/kwh

ElDobro
Posts: 65
Joined: Sat Aug 31, 2019 1:05 pm
Location: NJ

Re: Battery degredation

Wed Jan 29, 2020 5:50 am

During the Summer, Torque Pro had the Spark's capacity at 12.4, today it's at 11.5 with 39,866 on the clock. Using heat in the Winter and A/C in the Summer, the GOM usually averages low 50s now and high 70s- low 80s in the Summer.

MrDRMorgan
Posts: 1112
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Wed Jan 29, 2020 10:03 am

ElDobro wrote:
Wed Jan 29, 2020 5:50 am
During the Summer, Torque Pro had the Spark's capacity at 12.4, today it's at 11.5 with 39,866 on the clock. Using heat in the Winter and A/C in the Summer, the GOM usually averages low 50s now and high 70s- low 80s in the Summer.
Have you discussed your battery capacity degradation with a Chevy Dealer who works on Bolts too? The rated battery capacity [energy] for a 2015 Spark EV is 18.4 kWh. The warranty for the battery is 8 years, 100K miles or more than 35% degradation - which ever comes first. 35% degradation means your battery capacity must drop below 11.96 kWh to qualify. It looks like you have already dropped below that point at 37.5% degradation per the Torque Pro numbers. I think you have a good argument for a replacement battery.

ElDobro
Posts: 65
Joined: Sat Aug 31, 2019 1:05 pm
Location: NJ

Re: Battery degredation

Wed Jan 29, 2020 12:29 pm

MrDRMorgan wrote:
Wed Jan 29, 2020 10:03 am
ElDobro wrote:
Wed Jan 29, 2020 5:50 am
During the Summer, Torque Pro had the Spark's capacity at 12.4, today it's at 11.5 with 39,866 on the clock. Using heat in the Winter and A/C in the Summer, the GOM usually averages low 50s now and high 70s- low 80s in the Summer.
Have you discussed your battery capacity degradation with a Chevy Dealer who works on Bolts too? The rated battery capacity [energy] for a 2015 Spark EV is 18.4 kWh. The warranty for the battery is 8 years, 100K miles or more than 35% degradation - which ever comes first. 35% degradation means your battery capacity must drop below 11.96 kWh to qualify. It looks like you have already dropped below that point at 37.5% degradation per the Torque Pro numbers. I think you have a good argument for a replacement battery.
When I get the time, I fully intend to pursue this with the Chevy dealer.

MrDRMorgan
Posts: 1112
Joined: Wed Oct 30, 2013 7:27 am
Location: Manteca in Central California

Re: Battery degredation

Wed Jan 29, 2020 1:20 pm

ElDobro wrote:
Wed Jan 29, 2020 12:29 pm
MrDRMorgan wrote:
Wed Jan 29, 2020 10:03 am
ElDobro wrote:
Wed Jan 29, 2020 5:50 am
During the Summer, Torque Pro had the Spark's capacity at 12.4, today it's at 11.5 with 39,866 on the clock. Using heat in the Winter and A/C in the Summer, the GOM usually averages low 50s now and high 70s- low 80s in the Summer.
Have you discussed your battery capacity degradation with a Chevy Dealer who works on Bolts too? The rated battery capacity [energy] for a 2015 Spark EV is 18.4 kWh. The warranty for the battery is 8 years, 100K miles or more than 35% degradation - which ever comes first. 35% degradation means your battery capacity must drop below 11.96 kWh to qualify. It looks like you have already dropped below that point at 37.5% degradation per the Torque Pro numbers. I think you have a good argument for a replacement battery.
When I get the time, I fully intend to pursue this with the Chevy dealer.
Great! Please continue to post your experiences with the dealer. I estimate my 2016 Spark EV will hit the 40% degradation warranty point sometime in early January 2024. My battery warranty will end in June 2024 so it will be close.

ChadTi99
Posts: 1
Joined: Sun May 17, 2020 12:55 pm

Re: Battery degredation

Sun May 17, 2020 1:02 pm

Just wanted to share my battery degradation experience. I purchased my 2016 Spark EV In October of 2019 with around 23k miles and the initial reading was 15.47kwh. Now at 28k miles the latest reading was 14.40kwh just a few days ago. I’ve tried my best to baby the battery and I’ve only fast charged once but who knows what the previous two owners have done.

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