There is probably balancing that takes place past 93% charge or something like that. Sitting at 100% for a little bit may help the BMS calibrate a bit better but who really knows.
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What Percent is Your Tesla Charged to While at Home?
- Thread starter Resist
- Start date
There is probably balancing that takes place past 93% charge or something like that. Sitting at 100% for a little bit may help the BMS calibrate a bit better but who really knows.
From my understanding, the lower the SOC, the better. So letting the car sit at 25% / 20%, or even 10% should not be an issue, but rather good for battery life.
I don't think anybody knows for sure.
But my understanding is also that balancing can be done by charging to 100% SOC and then driving it back down right after the charging session completes.
Poll needs another option....
I have my HomeAssistant instance dynamically adjusting charge target to strongly preference charging on solar. I programmed an adjustment for temperature, too. So just about 60% in summer temperature conditions, up to 75% in deep winter conditions. That way we usually have sufficient range to get to the second closest DCFC in every major direction we would want to drive.
It gets a 95% charge then drive to ~20% trip every 4-8 weeks to trigger pack rebalance / total energy recalculate.
I have my HomeAssistant instance dynamically adjusting charge target to strongly preference charging on solar. I programmed an adjustment for temperature, too. So just about 60% in summer temperature conditions, up to 75% in deep winter conditions. That way we usually have sufficient range to get to the second closest DCFC in every major direction we would want to drive.
It gets a 95% charge then drive to ~20% trip every 4-8 weeks to trigger pack rebalance / total energy recalculate.
melvladimir
Member
Finally, I charged it to 100%: it showed 567 km.
It's a little weird: the first photo was taken June 10, 2023 (previous owner, 3000 km ago) it was 551km, and the second - I did it on August 25: 567 km.
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melvladimir
Member
Yes, you are right! I added Aero caps, switched wheels in settings, and forgot about it)
melvladimir
Member
Yeah. I turned it on when I had a long trip (502 km) as you explained earlier, to check when I would have to decrease the speed because I started from 110 km/h. For about 300 km I drove at 110 km/h, then I switched to 100 km/h and the final 150 km was mixed speed, mostly ~70 km/h and consumption 110-120Wh/km. So, after 502 km, which took 6 hours, 4% / 21 km left, and the average consumption was 141Wh/km.
I have these options, but it should be combined with 100% SoC. I don't know when I'll do it
johnny_cakes
Member
Press stop charging. LOL
Seriously, I rarely charge at home. I charge at work and it rarely gets to 30%. I come usually somewhere around 5 to 20% and leave it overnight. I charge what I need for the day with 5% buffer.
johnny_cakes
Member
I couldn't do 5% buffer but good for you. Your battery capacity must have held up well.
melvladimir
Member
For how long you have been doing this? Did you test your battery capacity at the very beginning? It's very interesting to have empirical results because I read very skeptical opinions regarding below 20% SoC.
Very, very well! If your trip is unpredictable use the worse case scenario as your scenario. If not, there is always the Supercharger. The key here is to charge just before your trip not any sooner.
melvladimir
Member
Yeah, I saw it. Still, I want to see some real empirical tests of very low SoC, that it doesn't affect capacity/power.
stopcrazypp
Well-Known Member
I have never seen any empirical cell tests or any chemical mechanism explanation that shows very low SOCs will have a long term negative effect vs higher SOCs. This one was always the worst one of the myths as there is literally zero evidence to support it.
The very higher SOCs at least there are some cell tests that show this.
Below 20% is fine.
For cycles some tests show the sweetspot is perhaps stop discharge at 10% or so.
But its absolutely not bad to go to 0%, compared to using high SOC.
Low SOC is not an issue.
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