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Mine seems to have leveled off around a CAC of 195. I'll post an update in a few weeks or when someone else sends me new data.
I did another range mode charge followed by a performance mode get-on-the-freeway, and this time the VDS went up to 257 kW, or 344 hp. For...
Some thoughts: First, it's a 2.0. It's VIN #543, and 500 and over are 2.0/2.5. Don't worry about the soft top. I live in Seattle, where it...
The PEM is the same, though I think there are some firmware changes in it. I haven't noticed any difference in parasitic losses, but I drive my...
In my case, not only isn't it needed, it's physical therapy not to have it. I told this story before, so I'll keep it short, but basically I had...
Adding ggr's #537. It's interesting because it's got both the longest time and lowest mileage of any of the cars in the dataset. It's...
There's not a specific notation for it in the log, but it's incredibly obvious. The log has a permanent once/day CAC measurement, and when you...
I don't think that it does much balancing in standard mode on the 3.0 battery, since the standard mode full charge is so low (~80% IIRC). And two...
That's actually really interesting, because the big bump up on mine around 130 days was due to a bunch of consecutive range mode charges, and the...
And here's the updated days-since-install chart.[ATTACH]
After my post last night Dave Denhart (#181) sent me an updated log that added more than two months' worth of data and which makes it the longest...
Here's the same data, but using days since upgrade rather than miles since upgrade on the x-axis. Now 425 is a bit of an outlier, and 33 fits...
Here's the latest version of the chart with one new Roadster (#33) added, thanks to slcasner. In addition, I realized that when I was extracting...
I hadn't looked, which gave me an excuse to have fun getting on the freeway this morning. I topped out at 681A, so I assume that the current is...
It seems like a bigger difference than between sport and non-sport is 3.0 vs. original battery. On a standard charge just getting on the freeway...
Not to mention that "pentest" is short for "penetration test," which usually means white hat hackers trying to attack a system to find holes to...
I agree completely. Which is why the more 3.0 owners who are willing to share their log files with me, the better. So far, there are only three...
Last I looked it was at about 195 and still declining.
I really doubt it. It seems pretty consistent that range mode charges increase the CAC on 3.0 batteries. While I haven't computed statistics on...
The balancing grid is always all 0s when the car is either charging or unplugged. It only balances when it's done charging (standard or range,...
It will switch the AC to cooling the battery if it thinks the battery is too warm. If the AC is weak, then presumably it will stay that way for...
Hi, and welcome. You seem like you've done your homework much better than many prospective Roadster owners. Roadster (the TMC member, not the...
It still seems low. My CAC is around 197, and when I recently did a range mode charge and then set it to standard mode it was at 285. Maybe it...
That doesn't sound right. When I range mode charge and set to standard, I get 285, and (as is well documented elsewhere), my battery has lost...
A couple of years ago I had a pretty serious knee injury, which meant that I couldn't bend my left knee more than a tiny amount. To aggravate...
I think it does vary by location, because I used my credit card and got a lot of frequent flyer miles for it.
At least as far as the VDS is concerned, the 3.0 upgrade is a pretty significant increase in power (I saw it claiming 243kW on a full battery when...
On my 3.0 I've seen the VDS claim as much as 243kW, which is ~326hp. How accurate it is and how that translates to the dyno is anyone's guess,...
The Roadster 3.0 cells are different from the Model S (or original Roadster) cells. They're from LG Chem, not Panasonic. As far as I know,...
670 has standard charge ideal range around 215 and IIRC range mode is ~314 (or was it 320?)
The owner of #181 contributed his data to me (thanks, Dave!), and I took another log from my car after doing a long drive and a few range charges,...
We knew it would eventually happen: I've passed you, Dave. I hit 121K this morning, and I'll be at 8 years in August.
I doubt I'd trade mine, though I might keep the current one and also get a new one. Like others, there's really a limited set of changes that I'd...
That's assuming that the CAC really determines when the car quits. I've seen cases where, when the range gets low, the car will adjust the ideal...
The slopes of the lines for the 3.0 batteries are -.0026 Ah/mile for 425 and -.0024 Ah/mile for 670 (with 670 measured up to where I started range...
Or pull the logs and use one of the log parsing tools that folks here wrote.
I'd love to add more cars to this. If you want to contribute logs, please PM me. All you have to do is get the log from the car and upload it to...
And finally, the data for the old batteries graphed as CAC vs. time since battery install. For my second battery I started the graph at the point...
Here's a graph that zooms in on the 3.0 upgrade period, and normalizes the x-axis to miles after upgrade. This shows much better that the decline...
Here's the lifetime CAC vs. Mileage with ecarfan's Roadster #425 added. Two things are interesting: on the original batteries, we had roughly...
I'm in Seattle, and it's been a cool spring. I saw a piece on TV saying that we've set the record for the latest first 60 degree day (which...
BTW, this offer is open to anyone. It might be interesting to do a big graph with lots of CAC vs. mileage curves for the original and 3.0...
If you send me your log file, I'll be happy to make a graph like that for you. PM me and we'll figure out how to transfer the file if you're...
Oh, and IIRC the little bump at 115,500 miles was also a range charge.
[ATTACH] Here is the graph showing what happened to the CAC when I range charged it every day for a week, then went back to normal. When it was...
I suspect that what's happening is none of the three options in my post that started the thread. I while back I decided to range charge the car...
It's in the log file that you can get with a USB drive. That's where the whole car histories that Dave and I used to make our graphs came from.
If it's got a working PEM, it's worth way more than $2100.
I looked at Dave's chart a little more closely, and I am no longer comforted. I think that all of the flattening of the CAC curve is due to his...
Dave's chart certainly makes me feel better. We'll see in a few months if mine is also levelling out. I'd be perfectly fine with sitting at a...