sr+ charging at 170kw

[coconutboy84]

hey guys, just found this video today.

charging looks so much better on an SR+ now!

 

[willow_hiller]

hey guys, just found this video today.

charging looks so much better on an SR+ now!

Thanks for posting this! I guess for people who were testing 2019.40.2+ in the Northern hemisphere, the key to getting 170 kW is outdoor temperature. Need some of that Aussie December heat!

@Zoomit just based on the limited amount of charging shown here, I think this matches up relatively well with your optimistic V3 prediction. It looks like the taper down from 170 kW starts at around 27% SOC. Hits 100 kW around 52-53%.

 

[Zoomit]

I think this matches up relatively well

I'd say it lines up very well, especially since I made those predictions in July! But seriously, the predictions were simply LR battery performance ratioed down to the SR+ battery size.

The video is disappointing--flipping between two displays and also showing rated range not %SOC, so it'd be hard to plot the data.

But yes, it looks very close to the prediction, maybe a few kW higher early and a few kW lower later. Here's the prediction:

Also, an easy way to remember if you're charging at the ideal rate is checking the charge power as it crosses 50%. Under ideal conditions, LR cars would be decreasing around 150kW while SR+ cars would be around 100kW.

 

[Pbaker609]

I tested the increased supercharging speeds at a V2 supercharger last night but it wasn't ideal conditions due to 30 degree weather and not preconditioning the battery long enough. I started charging at 18% and my charge speed peaked at 111kw when the battery reached 21% but speeds dipped to 85kw by the time I reached 31% battery capacity. I'll try again with the battery properly preconditioned from a lower SoC tomorrow and post results.

 

[LittleBlue]

I was able to get 138kw last night but it tapered quickly.
18% 138kw
19 138
20 138
21 132
22 129
23 123
24 121
25 118
26 114
27 112
28 111
29 109
30 108
31 106
32 104
33 103
34 101
35 99

 

[640k]

does the amperage drop when the kw drops? in other words, if the amperage remains the same, is the kw still relevant?

 

[Zoomit]

does the amperage drop when the kw drops? in other words, if the amperage remains the same, is the kw still relevant?

kW is volts x amps. As a battery charges, the volts go up but the amperage goes down to not stress the battery. An LR battery, under ideal conditions from very low SOC, will start at ~700A and during the charge process the amperage will drop to basically zero at the end.

 

[BEPA400]

I just got a peak of 127kw in my SR+being at 6degrees c maybe that’s why it was low. Or maybe because the station sucks. That was hope supercharger in B.C.

the first time I tried I had driven 150km before arriving with station programmed into destination. Had 3% to start and hit 118kw with a couple other cars also charging. Then drove 50km and tried again from 26% with no other cars charging and I hit 127kw. Have pics and vid but not sure it’s worth anything since I was probably temperature or station limited. At least I got clear over my previous limit of 100kw!

 

[BEPA400]

 

[robfarago]

The video is disappointing--flipping between two displays and also showing rated range not %SOC, so it'd be hard to plot the data.

Sorry only had 1 camera with me.

 

[SoManyM3s]

I can’t even get over 130kw in my LRwith preconditioning due to cold temperatures in NC. And gradual tapering down to less than 100kw by 40%. Is it just my car or is this the cold weather?

 

[Kognos]

I can’t even get over 130kw in my LRwith preconditioning due to cold temperatures in NC. And gradual tapering down to less than 100kw by 40%. Is it just my car or is this the cold weather?

Most likely cold weather. I have ~40-45 outside and I couldn't get charging to go above about 70kw.

The tapering makes sense though, I don't expect 100kw above 50% at all. The "optimistic SR+ V3" line above seems right on-point. I can't wait to test it fully when it's warmer.

I even drove 20 miles to get to the closest supercharger near me in Oregon, and they can't even handle 170kw anyway, cause I just wanted to see it go above 100kw. It wasn't showing the cold indicator anymore and even did the preconditioning since I was navigating to it, but alas, no dice, stuck at 70ish. Grr.

 

[robfarago]

this is the best plot I can do with the video data I have.

it was quite warm ambient termperature 27.5 degrees C (according to the BOM) and hd been 31 degrees earlier in the day. To get to the charger I had just finished 90km of highway driving at around 100km/h. Nb in the video the car temperature sensor said it was 31 degrees C.

 

[SilverSp33d3r]

I was able to add 21kWh into my battery in ~12 min last night going from 3% to 44% but only peaked at 116kW. 60 degree ambient temp and drove 45 miles navigating to supercharger.