Increasing SOC without charging

[B.K.]

M3 SR+ V10.2(2020.36.10), Left the house at 92%, just completed charging so the battery was warm, and arrived at the first destination with 88%. In the 30 minutes I was parked and waiting in the car with just the radio on, the SOC is now 90%.

 

[BuggDDS]

Plugged in last night like normal, didn’t touch a thing, my charge limit is always set to 90%, and this morning it’s at 92%

 

[JBT66]

Yep it happens to me from time to time as well. I think it’s just filling in the nooks and crannies.

 

[Siciliano]

Elon added in a new easter egg feature on battery day - regenerative charging for 2 hours after unplugging.

The feature is currently free, but there will be a $10,000 a month charge starting next month.

 

[Jim R]

An engineer could probably explain this for you. Something similar happens with my camera batteries. Shooting in cold weather. Camera dies. Change to fresh batteries. Put spent batteries in pocket next to my body. They warm up and are good for more shots later. So those batteries were affected by temperature changes.

 

[smatthew]

Left with 55% battery. Arrived with 60% battery.

Of course, I was driving downhill........

 

[JulienW]

Installed turbine generator's on my hood and I'm at 95% to 100% SOC 100% of the time and NEVER plug in.

 

[Kirby64]

Plugged in last night like normal, didn’t touch a thing, my charge limit is always set to 90%, and this morning it’s at 92%

Charging tends to overshoot the target percentage by 1-2%. Whatever you have it set at, it hovers around that. So it'll charge to 92%, let it drain to 88%, then charge back up to 92%. This is to keep the contactors from constantly being open.

 

[SigNC]

Also, if the battery finishes charging while cool, if the battery warms up the voltage will rise and your SOC will be higher.

 

[flyingowl]

It started happening to me since .32 update or the one before that. Its jumping +/-2% about once a week. Parked at store was 80, 15min later all of the sudden 82%

 

[Mr X]

Gained 3% in ~4 hours with Sentry mode on. I'm gonna keep sentry on more often

 

[AmokTime]

When the car is parked and sleeps it equalizes cells in the pack and then takes some calibration measurements, which may change the capacity computation. Perhaps you have some difficult-to-balance cells that are throwing you off and the calibration corrects it. I’d expect it to correct downward, but I suppose upward is also possible.

 

[GtiMart]

As others have said, there are two options. Option 1, your battery is getting warmer and more of that power becomes available to you. You don't need to see a blue battery portion for this to happen.
Option 2, the Bms readjusted its estimate of the battery's capacity so it adjusted the percentage full or the rated distance. In that case you didn't gain anything, only the estimated range or percent changed. Your battery stayed at whatever power level it contained prior.

 

[chdavis]

As others have said, there are two options. Option 1, your battery is getting warmer and more of that power becomes available to you. You don't need to see a blue battery portion for this to happen.
Option 2, the Bms readjusted its estimate of the battery's capacity so it adjusted the percentage full or the rated distance. In that case you didn't gain anything, only the estimated range or percent changed. Your battery stayed at whatever power level it contained prior.

Assuming #2 - it would mean he experienced some degradation, if I'm thinking about this correctly. I believe this happened on my car.

 

[McMoo]

I have this happen frequently. There are downhill sections going to my house where I regen and also from exiting highway less than 2 miles away and I feel like it doesn’t immediately account for the regen gains in the range or percentage shown.

 

[Fernand]

There's a 3rd Party wiring kit you can order that runs from your battery to the charge port. You can keep your car's SOC at 99% without ever connecting to an external charger. Not.

 

[Gasaraki]

M3 SR+ V10.2(2020.36.10), Left the house at 92%, just completed charging so the battery was warm, and arrived at the first destination with 88%. In the 30 minutes I was parked and waiting in the car with just the radio on, the SOC is now 90%.

OMG, you found infinite power.

 

[Jim R]

I have this happen frequently. There are downhill sections going to my house where I regen and also from exiting highway less than 2 miles away and I feel like it doesn’t immediately account for the regen gains in the range or percentage shown.

This discussion has nothing to do with re-gen. That's another (interesting) subject. It's about changes to battery readout that happen after parking the car.

 

[McMoo]

This discussion has nothing to do with re-gen. That's another (interesting) subject. It's about changes to battery readout that happen after parking the car.

I may not have been clear. I am getting changes after parking the car. I’ll park in my garage with 50% or 145 miles. I’ll return hours later and I’ll have 52% and 151 miles for example. I was thinking it could be due to regen that was not accounted for until after the car sits and is parked.

 

[PianoAl]

It's the immaculate connection. A miracle!