older cars kept around 50-60% SoC - how is degradation?

[polyphonic54]

Curious to hear from owners who have kept their daily charge limits low throughout ownership (4+ years).

 

[Electric700]

I keep mine higher than that but generally at or below 80% most of the time, and have seen just over a 2% range degradation. A lot of other owners are seeing similar behavior too.

 

[MorrisonHiker]

I typically charge to 80% on weekdays and probably charge about six days a week. I'll charge to 90% or higher for road trips. My S100D has about 2% degradation over 42,000 miles and 3 years.

 

[David_Cary]

I keep mine on the low side and timed pretty well charging so that I am at 50% overnight, charging say 3-5 AM and make it home around 50%.
70D 5/15 build. 240 original, 222 now? Varies every time I charge to 100%. I usually say 8% degradation.

 

[sorka]

Stored at 50 to 70% but charged to 90% for 260 mile round trip commute. I charge to 90% about 4 times a week. I'm at 112K miles. I'm at 5.5% degradation. 5 years old this month.

 

[tnt1971]

2016 S85D. Took delivery in March, 2016, 72k on the odometer. I rarely charge over 70%, less than 5X a year and most days only charge to 50% or less. Rated miles new were 270, current range charge (just did one two weeks ago) is 262. I did see 275 on a range charge when the car had less than 10k on the odometer. If you use the 270, it is about 3% degradation. It is just under 5% using 275.

 

[polyphonic54]

If you use the 270, it is about 3% degradation. It is just under 5% using 275.

That's exactly what I was looking for. Since 50% is theoretically better for the battery, and I typically only burn 10-15% in a day, I've been keeping it there and charging higher just prior to road trips.

Have you charged higher recently for calibration purposes? My guess is the 275 rating was a calibration error.

 

[SSonnentag]

2017 S 100D with 73,000 miles. Routinely charged to 70%. I'm seeing 6-7% degradation, which seems a bit higher than the average.

 

[polyphonic54]

man, this forum.. care to explain @outdoors ?

 

[tga]

2014 P85+, 86k miles. CPO bought 12/2016 w/ 29k miles. When I got the car, it showed 261 @ 100%. Currently I'm at 228-229 @ 90%, 254 @ 100%, so a bit over 4% degradation.

I generally charge to 70% daily, with a 90% charge the night before a roadtrip (1-2 times/month). I will top off to 100% occasionally 2 hours before departure.

I don't know how the battery was treated by the prior owner.

 

[TRBMD]

2016 75D. Charge kept mostly 40-60%. 26 K miles. Probably 60% done at superchargers for brief (10 min) charge periods. I have lost 2%

 

[tnt1971]

Have you charged higher recently for calibration purposes? My guess is the 275 rating was a calibration error.

I don't think it was. Rarely have I seen the car differ from the top rated miles. For example, at 262 a 50% charge gives me 131. Sometimes I will get a 130 and once in a blue moon I will see 129. When it was new I used to see 136 on a 50% charge and 138 when range mode was on. I take a phone screenshot every time I max charge it and I have the 275 someplace. Some time later it was 272, then 270, then 267, etc. Again, I only charge it up there once or twice a year and it has never sat at that high level of charge. Most of the loss in range happened after the "batterygate" software update and it happened gradually, over about 15k miles.