M1tch
2021 M3P with EAP
I personally charge to 90% as I intend keeping the car for many years. A friend of mine has his on lease and therefore “doesn’t care” about the long term battery health so charges to 100% regularly.
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Charging to 100%? Is it that bad?
- Thread starter Xdeanyy
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WannabeOwner
Well-Known Member
What is the SOC percentage when you get it back home?
I reckon if it has fallen to 95% that's "not all that bad", and if it has fallen to 90% I wouldn't give it a second thought.
So I reckon it depends how far away from home you charge at - e.g. when doing your regular shopping.
Plenty of stories of airport taxies that were regularly charged to 100% (overnight) and left sitting like that, and rapid-charged during the day - so basic zero "gentle charging" and even those didn't have significant degradation - and that was earlier battery chemistry and BMS than today
Since you don't have LFP, you should train yourself out of doing this. First, that last 10% takes WAY longer to complete, so you are wasting a lot of time charging (and/or taking up public charging space even if you are not waiting in the car). Second, and more important, you will be impacting the lifetime of the battery (and possibly resale value of the car).
MrBadger
Badger out
Big issue of charging to 100% at a public charge point is tying up that charge point for others to use due to slow charge speeds at high SOC%
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Yeah, I don’t think I’ve ever gone past 80% on a Supercharger. Wanted to murder the other drivers at Gordano the other week when they were all charging to 100% while other queued up.
I'm generally using a public charger that's empty overnight so it's not an inconvenience to others. I hate those supercharger hoggers. Other day I was at a super charger and two Model S next to me were there when I arrived on fully green charge and there when I left. I went from 15% to 85% in that time.
If you plan on keeping the car for many years and want to have minimal battery degradation, you really shouldn't charge to 90%.
M1tch
2021 M3P with EAP
I charge to 90% at the weekend and use 80% commuting to work on a Sunday evening. I slow charge in the week to 90% and return home on a Friday evening. It’s that or ICE.
PITA
Model 3 Performance
Sat right now... happily around 80%
I do charge it to 100% every 3 months on average for a big trip.
Otherwise, 80-90% is always good enough. As we have 3 Phase charging at home, I can charge about 65% on cheap rate during 4 hours... so it's very handy
Rarely let it drop below 15%
I do charge it to 100% every 3 months on average for a big trip.
Otherwise, 80-90% is always good enough. As we have 3 Phase charging at home, I can charge about 65% on cheap rate during 4 hours... so it's very handy
Rarely let it drop below 15%
Nick77
Deep Blue Model 3 LR (2021 MIC)
BitJam
Active Member
Kyle Conner charges an EV to 100%, drives it down to 0% and measures how much juice was used. Of course you need to do this at least twice to get degradition over the time between tests.
You can also use service mode to check degradation but it doesn't work on all Teslas due to a bug:
A cheap and easy way is to use the energy consumption screen which gives you wh/mile and remaining range which can be combined with the state of charge percentage to give you the total watt hours in the battery. Again, you need to do a before and after to get the degradation between tests.
There's no top end buffer. 100% is a full 4.20V/cell
...and by "90% is fine", Tesla means that you're not expected to have > 30% degradation by the time the warranty expires. It does not mean that you'll anything close to minimal battery degradation doing that all the time.
BitJam
Active Member
There is a buffer at the bottom end so when it says 0% there is actually some energy left. Kyle measures the buffer size in his video I linked to above.
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