Driving 20 minutes doesn't warm up the battery enough to get the full charge speed. (Even once full regen is available, that isn't warm enough for full speed Supercharging.)
My S supercharge speed seems to be restricted at ~50KW
- Thread starter phdwhite
- Start date
Driving 20 minutes doesn't warm up the battery enough to get the full charge speed. (Even once full regen is available, that isn't warm enough for full speed Supercharging.)
That is normal behaviour for a battery that isn’t fully warmed up yet. If you have any regen limit, then charge speed will be limited to similar (<50kw). Even if you have no regen limit, the battery may still not be warm enough for full speed 115kw supercharging.
People are probably getting low charge rates due to cool battery, and then trying to shuffle around believing here was something wrong with charger. Yes, the next charger you plug into may appear to give faster speeds at start compared to the first one you plugged into, but that’s because your battery is warmer now. That is not usually productive, and you will likely charge fastest if you just leave it plugged in.
I got only 35 kW at the East Palo Alto Supercharger (urban 72 kW max) at 52F outside. TeslaFi said the battery heater was on. I didn't try other chargers. This is the first time I've seen the battery heater on, which could just be a new API/TeslaFi feature. FW 2018.50.6. Only charged for 15 minutes, but 35 kW was constant the whole time.
Seems like a newly conservative Supercharging behavior for slightly cold temperatures.
Seems like a newly conservative Supercharging behavior for slightly cold temperatures.
Big Earl
bnkwupt
2015 MS 85kW on the road now. Stopped by Cambridge OH and Dayton OH SCs. Both limited to 50-70kW initial charging with battery at only 20% after having driven for hours in 50F weather.
This sucks, I will pick up on the advice here and call Tesla from the next SC when this happens.
This sucks, I will pick up on the advice here and call Tesla from the next SC when this happens.
RedOctober
Member
Weird thing is the charging on my S has increased by 37kw for some u/k reason. Had to be a software update but never received any kind of notification.
This is a common problem now. I can't get above 40kw on my 2013 P85 with 60k miles. Even my chademo adapter only gets 38kw. Service center says "we couldn't find any faults in your logs, nothing is wrong".
I just took our 2013 MS85 to a Supercharger for the first time since June with some pretty good results. I was picking up my wife at LAX and wanted to try out the V2 stalls in Redondo Beach early Sunday morning, but by the time I got within 30 miles the on-board navigation said there was only 1/8 available so I knew I wasn't likely to get an unpaired stall. I opted to charge at the 72kW Urban stalls at Manhattan Beach and the navigation said there were 6/12 available. I arrived with 50 miles of range remaining and I was 2nd in line for the next available stall. After waiting 6 minutes, I was able to plug in and saw the charging speed hold at 72kW.
As I had breakfast at the Corner Bakery, I was monitoring the charging via mobile app and noticed it started to taper down to 71kW at 94 range miles (38%) and 50kW at 142 range miles (58%). I was able to get from 50 to 197 range miles (21% to 81%) after 40 minutes of charging which is not too bad. I thought the new Supercharging experience was going to be bad because the last time two times I tried V2 stalls with a low SOC%, I never got above 42kW. I was never clear if it was my car (hardware or software) or the Supercharger hardware. Charging is slightly worse than chart from ABRP:
Another observation was the front radiator fans were humming when I got back to my car while it was Supercharging. 2 miles later I'm driving in gridlock through the Sepulveda tunnel and I hear a loud droning noise that sounded like a street cleaner truck. I wondered if the tunnel had ventilation fans, but I soon realized that droning noise was the fans from my Tesla. I think Tesla is very concerned about thermal management with the older battery packs and made some changes through software.
BTW, my HVAC was off, ambient temp was 70F, and I don't drive the car hard (lifetime 302Wh/mi).
As I had breakfast at the Corner Bakery, I was monitoring the charging via mobile app and noticed it started to taper down to 71kW at 94 range miles (38%) and 50kW at 142 range miles (58%). I was able to get from 50 to 197 range miles (21% to 81%) after 40 minutes of charging which is not too bad. I thought the new Supercharging experience was going to be bad because the last time two times I tried V2 stalls with a low SOC%, I never got above 42kW. I was never clear if it was my car (hardware or software) or the Supercharger hardware. Charging is slightly worse than chart from ABRP:
Another observation was the front radiator fans were humming when I got back to my car while it was Supercharging. 2 miles later I'm driving in gridlock through the Sepulveda tunnel and I hear a loud droning noise that sounded like a street cleaner truck. I wondered if the tunnel had ventilation fans, but I soon realized that droning noise was the fans from my Tesla. I think Tesla is very concerned about thermal management with the older battery packs and made some changes through software.
BTW, my HVAC was off, ambient temp was 70F, and I don't drive the car hard (lifetime 302Wh/mi).
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Lasttoy
Active Member
I've read alot of post today on this. Seems all owners of OLD cars have been throttled back on our charge rate. My high lately is 78. It's getting worse. Also my car used 72 miles last night to go 52 miles and I was down to 59 mph. My mileage range has gone really far down?.
aerodyne
Active Member
Here is a chart showing a comparison on SuC speeds on my car. Worth noting is V10 update seems to have smoothed out the charge rate at the upper end.
The sum of power in Kw plus SOC in percent is nearly constant at 111-112. Lower than it used to be last year, but an improvement over this Summer.
The sum of power in Kw plus SOC in percent is nearly constant at 111-112. Lower than it used to be last year, but an improvement over this Summer.
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IMG_20191118_180424594.jpg
Same happening me, won't go above 50 kw. Tried multiple supercharging stations including newer with few cars and others there getting much higher rate. Does not depend on soc as have brought it by at 20%, also in socal on the coast with temp about 70 F. Did an experiment and my 85d C series battery pack will only take about 64kwh going from 7% soc to 98%. That's what the charger delivered to the car over the charging session. Do others have similare?
aerodyne
Active Member
aerodyne
Active Member
See my post with image above. I got significantly higher after updating to V10
Most batteries I'm familiar with can develop a "surface charge" (at high charge rates) that makes it more difficult for a deep charge to occur. Moving to another stall uses part of that, and still more sinks into the cell during the move, which results in a temporary increase in charge current when you plug in. This also explains why charge current decreases as the SOC increases. Forcing a battery to charge faster will definitely shorten it's life, and in extreme cases cause it to overheat and possibly explode. This even applies to the lowly NiCads and Lead-Acid batteries.
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