SR+ Charge rate and time after 2019.12.1.2

[Legen---dary]

I took a road trip of about 900km yesterday, and halfway through did an upgrade to the firmware.

The trip involved 5 supercharge stops, so I managed to gather a little data. The last two stops were with the newer firmware. Here's some charge info from stop number 4. It seems the rate has been increased a little from the 101/102kW limit, and the sustained charge rate increased a fair bit. The charge rate was lower until it got up to about 18% SOC.

Of note, it would flash between 104/105kW. Not sure which is correct.

@ 22% SOC 105kW (after adding 3kWh)

@ 35% SOC 105kW (after adding 10kWh).

@ 40% SOC 105kW (after adding 13kWh)

@ 45% SOC 90kW (after adding 15kWh)

@ 51% SOC 70kW (after adding 19kWh)

 

[Zoomit]

Did you have the Supercharging stations selected in Navigation for stop 4? Just want to verify On-Route Battery Warmup was used.

 

[Legen---dary]

Did you have the Supercharging stations selected in Navigation for stop 4? Just want to verify On-Route Battery Warmup was used.

Yes. I made to sure navigate to all superchargers (even though I know the locations), just to be sure the battery-conditioning function was enabled. Sorry, I should have mentioned that.

 

[Zoomit]

Did you happen to notice, when it was more-or-less steady at 104-105kW, if turning the HVAC off changed the charging numbers?

 

[Legen---dary]

Did you happen to notice, when it was more-or-less steady at 104-105kW, if turning the HVAC off changed the charging numbers?

I did in fact test that. It didn't make a difference to the charge speed, so I suppose the HVAC pulls power on top of the charge, rather than from it. I was trying to get it to stop flickering between 104/105 when performing that test.

 

[Zoomit]

Thanks! The car pulls more than the shown power to supply accessories and HVAC. You confirmed it’s not stall limited and the car can pull in more amps than the battery amp limit.

I’ll check the numbers tonight but it looks like this profile is just ~70% of the new LR battery profile, which is consistent with the difference in pack size.

 

[karki]

I’ll check the numbers tonight but it looks like this profile is just ~70% of the new LR battery profile, which is consistent with the difference in pack size.

That's interesting. So ~105 kW makes sense on an SR+ compared to the ~150 kW max on an LR.

Although, haven't we seen v3 push 250 kW into the LR? If charging rate is directly proportional to pack size like you suggest, wouldn't that mean SR+ could still hit 175 kW max, which would allow it to hit 150 kW on a v2 supercharger? Is there more going on with v3 besides raw kW that allows the battery to take the higher charge?

 

[Zoomit]

That's interesting. So ~105 kW makes sense on an SR+ compared to the ~150 kW max on an LR.

Although, haven't we seen v3 push 250 kW into the LR? If charging rate is directly proportional to pack size like you suggest, wouldn't that mean SR+ could still hit 175 kW max, which would allow it to hit 150 kW on a v2 supercharger? Is there more going on with v3 besides raw kW that allows the battery to take the higher charge?

I do expect the SR batteries to accept 175kW or so on V3 and, importantly, when Tesla engineers feel confident in that charging profile. There are two related development streams going on with this. One is the Supercharger hardware/software getting finalized and checked out to perform as designed. The other is the validation of the car hardware and batteries. Obviously the V2 stations can charge more than 105kW but the higher stress (higher C-rate) charging profile for the SR batteries is not yet ready for fleet use. It looks like both the SR and LR batteries are being "stressed" at the same level now with their respective charging profiles.

This means that while the LR batteries are not likely to receive much additional power from V2 Superchargers after their V3/250 kW charging profiles are released, the SR cars will likely see a significant jump from ~105 kW peak up to 150 kW on the numerous V2 Superchargers. To put that in context, that's a full 50-150% faster charging than it's competition, which peak at 50-100kW.

 

[Zoomit]

I posted a SR+ charging graph on this thread along with updated LR charging sessions.

150kW Supercharging for Model 3

 

[Legen---dary]

I posted a SR+ charging graph on this thread along with updated LR charging sessions.

150kW Supercharging for Model 3

Hey Zoomit. My last data was terribly lacking, so I went out specifically to get you some fresh higher resolution numbers.

Ambient temperature was 20C, navigate to SC on, drove hard for 30 mins prior, no HVAC the entire time.

Cost, for any who are interested in what it is up here in Western Canada at a SC: $17 for this session:

% / kW / kWh / time of day

8 0 0 1828
8 10 0 1828
9 40 0 1828
9 43 1 1829
10 46 1 1829
10 51 1 1829
10 54 1 1829
11 57 1 1830
11 60 1 1830
11 64 1 1830
11 69 2 1830
11 74 2 1830
12 78 2 1830
12 84 2 1830
12 89 2 1830
12 93 2 1830
13 95 2 1831
13 99 2 1831
15 105 3 1831
20 104 6 1833
25 105 8 1835
30 104 11 1836
35 105 14 1838
40 105 16 1839
41 102 17 1840
42 94 18 1840
43 90 18 1841
44 85 19 1841
46 79 20 1842
48 72 21 1843
50 69 22 1844
52 66 23 1845
55 61 24 1846
61 50 28 1850
67 43 31 1854
71 40 33 1857
76 35 35 1901
80 28 38 1905
85 21 40 1912
88 18 42 1917
90 16 43 1920

 

[Zoomit]

fresh higher resolution numbers

Nice! Looks like a similar taper as your previous session. I’m saturated over the next few days but will definitely update the SR+ chart.

 

[Legen---dary]

 

[Zoomit]

Cross posting from here: 150kW Supercharging for Model 3

 

[11thIndian]

This is great info. Thanks guys. I’m still trying to decide between an SR+ and LR RWD. Long range trips would be the exception, but the possibility that SR+ could see the full 150kW on V2 and 175kW on V3 would make my choice a lot easier. But it’s likely I’ll have made my decision before this is confirmed.