Lucid Gravity UX 3.6 is here!

[ke2]

Posting this in the 3.6.0 thread as I think it might pertain to software version 3.6.0

I drove down from the SF Bay Area to LA on Sunday. We've got a Grand Touring model with Dream Drive 2 Premium. We've upgraded to version 3.6.0 but hadn't driven the car much. About half way through the trip the adaptive cruise control would occasionally wig out on me when I would accelerate to pass someone. I would then have to reset the cruise control. One thing I noticed going down i5 is that the car seemed to be able to drive hands free which was quite the surprise as I thought the hands free needed Dream Drive 2 Pro. I didn't take my hands off the wheel for too long but would just life my hands off for about 30 second and the steering wheel would twitch back and forth minutely so I figured the car must be doing some type of hands free driving.

So is Dream Drive 2 Premium now able to do limited hands free driving?

 

[exxxviii]

All charging rates drop as the battery gets full.

This is true at much higher charging rates. But the L2 charging C-rate is so low that it can (should) stay at peak well past 80% and normally past 90%. At least this is true for every other electric vehicle I am familiar with.

 

[240]

Charged the car from 80 to 85% the other day and it stayed at 19kW for the whole charge which was less than 30 minutes or so. However, if the car needs to charge for more than 45 minutes, the charging is being throttling down to 11kW at the 45 minutes mark.

 

[HC_79]

So is Dream Drive 2 Premium now able to do limited hands free driving?

DD 2 Premium lets you take your hands off the wheel briefly but is not hands-free. You'll get a warning eventually to put your hands back on the wheel.

 

[240]

My charger is currently on firmware 01.02.08, but still having the same charging limitations. Seems like I’m going to have to go through the troublesome troubleshooting process with a service center.

 

[socktucker]

Charged the car from 80 to 85% the other day and it stayed at 19kW for the whole charge which was less than 30 minutes or so. However, if the car needs to charge for more than 45 minutes, the charging is being throttling down to 11kW at the 45 minutes mark.

maybe that's just going to be how it is?

 

[240]

maybe that's just going to be how it is?

Other owners have reported that they’ve had to have their power management system replaced in order to get it to work correctly.

 

[GravitMe]

Other owners have reported that they’ve had to have their power management system replaced in order to get it to work correctly.

Yes, the main power box (MPB) which controls both the AC and DC charging has issues.

 

[240]

Yes, the main power box (MPB) which controls both the AC and DC charging has issues.

Thank you for the clarification. I have a service appointment with Torrance, CA to have several things looked at.

Hopefully this can be resolved easily.

 

[Lycra]

I should clarify for those following my updates - several techs and back-and-forth with the San Jose service center to check on my GT's AC home charging have confirmed the "expected" behavior of the SW making adjustments around the 60% of "Charge Limit" setting. And for sure there is AC charging components delta between GT and DE's.

Now I did push hard that as a customer I don't expect AC charging to ever reduce as SOC increases but that is the current state of GT's HW and SW combo - and it may not be all GT's but possibly some components binned or out of spec, or just SW not modulating well. In any case that is what the service techs know from their communications with engineering side. As for what's the long term POR (Plan of Record), they have no idea. Maybe SW can eventually fix things up so all GT's can AC charge at max rate the whole time, but I wouldn't bank on it in the near term.

Correct ac charge should be the exact same from.0 to 100 percent.

 

[Smorgasbord]

This is true at much higher charging rates. But the L2 charging C-rate is so low that it can (should) stay at peak well past 80% and normally past 90%. At least this is true for every other electric vehicle I am familiar with.

The post I was responding to was responding to a post about 80amp charging not maintaining 80amps as the battery SOC increased.

That's normal behavior for every EV I've ever driven, and I've been driving them since 2011.

They are not supposed to. Only DC charging rates should drop as the SOC increases. That this happens right now appears to be a bug (and doesn’t happen with Lucid’s latest LCHCS)

Sorry, but I know of no car that will maintain an 80amp AC charging rate at 97% SOC.

 

[exxxviii]

The post I was responding to was responding to a post about 80amp charging not maintaining 80amps as the battery SOC increased.

That's normal behavior for every EV I've ever driven, and I've been driving them since 2011.

Yes, and a 19.2 kW charge rate is a very slow rate by any BEV standard. It is a tiny C-rate that should maintain its max to high in the SoC range.

Also, the fact that others are posting similar issues with 11.5 kW charge rates should hint at a general charge curve problem with all L2 charging.

 

[Smorgasbord]

Now I did push hard that as a customer I don't expect AC charging to ever reduce as SOC increases...

Be careful with the word "ever" here. There is no consumer EV I know of that will charge at 80amps when at 99% SOC. Probably not at 95%, either.

That said, having the charge rate reduce at only 60% SOC does seem non-optimal. But, then again, there are very cars that can charge at 80 amps AC anyway.

...a 19.2 kW charge rate is a very slow rate by any BEV standard.

No, it's not.
I bet you can't list a dozen EVs that can charge at that rate even at 20% SOC.

Besides the Lucids, the Porsche Macan EV, Porsche Taycan with an optional charger upgrade, some trims of the Chevy Silverado and Cadillac Lyriq. Original Tesla Model S vehicles had an upgrade to support 80amps, later ones (through 2019) could support up to 72 amps. The Roadster supported up to 70 amps, although there was a claim that revised firmware would support 80 amps.

So, no, 80 amps is not slow by even the highest BEV standards - it's the max there ever was and is and only a handful of vehicles can achieve that at the lowest SOC.

 

[exxxviii]

So, no, 80 amps is not slow by even the highest BEV standards - it's the max there ever was and is and only a handful of vehicles can achieve that at the lowest SOC.

Resoundingly yes: 19.2 kW charging is very slow on any BEV, even a Leaf. DCFC is the speed baseline, and the Lucid probably doesn’t get much below 100 kW at higher SoC.

The AC current is irrelevant here, because the onboard charger converts the power to around 20 A at 926 VDC at the battery. And the battery’s intake is what should limit charge rate. Consider that at the Gravity’s max charge rate of around 400 kW, it is pulling 430 A. And at a measly 100 kW DCFC, it is pulling 110 A. 80 A A/C is a nothing burger.

Edit: Adding a little more context to tie back to my original response… an 80 A L2 charge on a Gravity is only around a 0.16 C-rate. This is a rounding error and well below the point that the car should exhibit reduced charge rate limitations at any SoC. That does not occur until north of 1 C.

 

[FeelLicks]

Resoundingly yes: 19.2 kW charging is very slow on any BEV, even a Leaf. DCFC is the speed baseline, and the Lucid probably doesn’t get much below 100 kW at higher SoC.

The AC current is irrelevant here, because the onboard charger converts the power to around 20 A at 926 VDC at the battery. And the battery’s intake is what should limit charge rate. Consider that at the Gravity’s max charge rate of around 400 kW, it is pulling 430 A. And at a measly 100 kW DCFC, it is pulling 110 A. 80 A A/C is a nothing burger.

Edit: Adding a little more context to tie back to my original response… an 80 A L2 charge on a Gravity is only around a 0.16 C-rate. This is a rounding error and well below the point that the car should exhibit reduced charge rate limitations at any SoC. That does not occur until north of 1 C.

Agreed. And my home charger is only 48A actually. My guess is they just slapped on a very simple and super conservative algo - which I'm ok with for now. Maybe because of the HW change to NACS? Hopefully that means SW will eventually be able to AC charge correctly at full speeds all the time.

 

[9point81]

Resoundingly yes: 19.2 kW charging is very slow on any BEV, even a Leaf. DCFC is the speed baseline, and the Lucid probably doesn’t get much below 100 kW at higher SoC.

The AC current is irrelevant here, because the onboard charger converts the power to around 20 A at 926 VDC at the battery. And the battery’s intake is what should limit charge rate. Consider that at the Gravity’s max charge rate of around 400 kW, it is pulling 430 A. And at a measly 100 kW DCFC, it is pulling 110 A. 80 A A/C is a nothing burger.

Edit: Adding a little more context to tie back to my original response… an 80 A L2 charge on a Gravity is only around a 0.16 C-rate. This is a rounding error and well below the point that the car should exhibit reduced charge rate limitations at any SoC. That does not occur until north of 1 C.

He is meaning 19.2 KW for AC charging is fast. It is slow for DC fast charging. The few EVs on market he mentioned with a 19.2kw AC charging is about right and quite rare in the US. Most top out around 10 kw max for AC charging.

 

[exxxviii]

He is meaning 19.2 KW for AC charging is fast. It is slow for DC fast charging. The few EVs on market he mentioned with a 19.2kw AC charging is about right and quite rare in the US. Most top out around 10 kw max for AC charging.

I got that, but he is confusing that by the fact that 19.2 kW is slow in an absolute sense and is not a reason that the charge curve should degrade at high SoC. My original reply addressed that.

 

[HomeIn2]

As they say, patience is a virtue… However, am I the last remaining GGT with DreamDrive Pro owner that hasn’t got the 3.6 OTA green light yet?

 

[HC_79]

As they say, patience is a virtue… However, am I the last remaining GGT with DreamDrive Pro owner that hasn’t got the 3.6 OTA green light yet?

Nope…..

 

[Dank]

As they say, patience is a virtue… However, am I the last remaining GGT with DreamDrive Pro owner that hasn’t got the 3.6 OTA green light yet?

I have a dream edition without the update