Tesomega
Member
This post talks about what charge speeds and % charge people are seeing. Who are using ABRP.
A Better Routeplanner
A Better Routeplanner
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⚡️ELECTROMAN⚡️
Village Idiot
Awesome, I'll definitely be taking advantage of this offer. I have to charge my iPhone 6 about three times a day. Looks like I have to wait till end of January for some reason. Maybe Apple could give us a choice, like Tesla does, to choose the max charge percentage, and maybe even the charge rate. It would be interesting to see if the degradation was greatly reduced if the battery was only charged to 80 or 90% everyday.
You can use an older USB - 110v adapter that puts out only .5A I use one at work and with me using the phone it never charges it up all the way. iPhone 6.
JRP3
Hyperactive Member
You could try unplugging the charger at 80 or 90% charge instead of waiting for 100%. But yes a software limit would be nice for when you forget.
I've always wished they would come right out and say something. I dont *need* to charge to 80% every day. So if it's better to do 70%, sign me up.
another issue is that it will affect resale value for tesla owners. people will want to know how many times cars have been supercharged and that was never disclosed as a possible value variable. i think tesla should step up and warranty the battery when it reaches a certain number of supercharges. i believe a slight battery degradation was common knowledge but this slower supercharging rate which will adversely affect resale value was not disclosed upfront. tesla's battery warranty was one of the reasons i felt safe buying this vehicle.
With ICE vehicles you can't tell how the previous owner broke it in, and that can make a substantial difference in power or MPG. We're talking a smaller difference than that here.
that is an interesting comparison but
i still believe tesla needs to act here. i see similarities with the iphone "feature" of slowing down processors on older phones with degraded batteries. the claim of better user experience (avoiding crashes, better battery life) was rejected by the community as a whole and apple decided to replace batteries for a nominal charge of 29 vs 79 dollars. the backlash to the non transparency and the spin on trying to improve user experience did not work. i don't think it will work with tesla either.
Go look at the link a few pages back for data from A Better Route Planner on actual charge rates. All of the battery sizes have a normal charging curve, and there is more area under the 90 and 100 curves than the 85 curve. But all of the battery sizes have outliers with low charge rate. If Tesla wants to make users happier they will likely do so by finding better ways to solve the problems that cause 50kW Supercharging, since that makes for a huge difference in stop time. The difference between 90 and 95 in the first few minutes of charge is trivial in comparison.
Completely a fair point that I had never even considered. However, I will say this in rebuttal; no production car to date has had the level of detail/diagnostics/monitoring that a Tesla has. With that lifetime of data collection, the conclusions to reduce charging levels based on certain metrics, needs to be transparent moving forward.
Whereas in the past, we just couldn't know how much HP was lost to cylinder wear without a dyno, now we have the information to tell an owner, "this is your 301st time supercharging, you should know that all further supercharging sessions will take you an extra 7min now". Unpopular? Probably. Informative? Yes, because then you empower the owner to make different choices if they need to. And one of those choices may be, "I'm going to buy the 100kwh battery because it has less issues with this problem, or higher tolerances for other problems."
I could see having a "battery health" number exposed on a service screen. Perhaps a score out of a hundred. But given the number of gasoline cars I hear knocking because people put regular in them when they require premium, I'm pretty sure anything front and center is going to confuse and/or annoy most owners. Remember that we are the weird ones.
That's what I was getting until they fixed my passenger side cooling louver which was stuck closed.
My reduced charging has nothing to do with degradation. At 50K miles my max power @90% with max battery on is still 458KW (1535 amps x 298 volts) which is the same it was when I got the Ludicrous upgrade at 18K miles and I was still getting the full charge taper. Clearly my internal resistance hasn't increased enough to cause a loss in power.
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How do you know? Do all of those properties degrade at the same, proportional rate? I could see capacity, charge rate and discharge rate degrading at different rates. Perhaps Tesla allows greater degradation for high power discharge, as a remedy for past complaints about power limiting. Or allows higher rates because max discharge only happens for a few seconds at a time as opposed to charging which happens for potentially dozens of minutes. Who knows how it actually works? (rhetorical, because no one outside of Tesla has this info).
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