I never knew charging would be this slow above 80%

[DaveA]

Showboating time!!!! The taycan is on a league of its own.

And a one trick pony…

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[Christopher]

There are some manufacturers that let you use less of the actual battery size. Thus, what you see as 100% is not really 100%. Some leave as much as a 5-10% buffer at the top. For those, they will appear to reflect better charging speeds at higher "shown" percentages. The car may show 90%, but could actually only be 80%. While all have at least some buffer built in, most EV's have much higher battery use. Can vary from car to car. But, probably in the 98 to 99% range. I should have said "most" indicating nearly all EV's. Rivian and Tesla let you use most of the battery available. Tesla's are very slow at the top as well. As are "most" other EV's. Sorry for any confusion.

I guess there could also be some that let you pack it in all the way to the top. But, that's been pretty widely known as not being a healthy approach for the long term life of the battery.

I guess this could be the reason why you see other vehicles that have better charging performance at the top. I remember a while ago reading an article where Tesla was using the same battery pack in their lower range models and just unlocking the range via software update if the customer purchase the higher range model. That sounds like the same situation where there would be extra space at the top and why the charging is faster because you're really charging to 90% instead of 100%.

I just wish all manufacturers would release charging curves for common scenarios such as L2 and DCFC. Maybe one day the EPA will have a standard measurement for charging such as what they do with MPG.

 

[kizamybute']

I guess this could be the reason why you see other vehicles that have better charging performance at the top. I remember a while ago reading an article where Tesla was using the same battery pack in their lower range models and just unlocking the range via software update if the customer purchase the higher range model. That sounds like the same situation where there would be extra space at the top and why the charging is faster because you're really charging to 90% instead of 100%.

I just wish all manufacturers would release charging curves for common scenarios such as L2 and DCFC. Maybe one day the EPA will have a standard measurement for charging such as what they do with MPG.

Exactly right. I do remember hearing that the "60" or "70" versions with a 75 kwh battery actually installed, had better charging rates at the top since they weren't actually charging the battery "full". Also, assists in degradation as they experienced less degradation than did others since that buffer was built in.

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