SilverGS has the answer. It was a software update maybe in 2019? The older S’s have drastically nerfed charging speeds. My 2013 S barely gets 50kW past 40% state of charge and typically settles into the 30s above 50% state of charge.
I’m sure an actuary crunched the numbers and by “protecting” the battery it saved a lot in HV recalls, but I wish out of warranty cars would have the option to prefer speed of charge over range of battery being completely on the owner now.
I’m sure there are also EE reasons. But it’s really been a bummer and besides free supercharging if you’re a local commuter (which now spends MORE time taking up a charging stall) it’s hard to recommend an older S to people. Also somewhat surprising how much some people are asking for them for sale. Nevermind the various hardware that can go on older cars (door handles, delaminating screens, scroll wheels).
I’m not a hater- 236k on my S and it’s showing it’s age lately. But it’s 3.5¢ a mile for me to drive in electricity and more fun than the car it replaced! I will continue to drive it and enjoy!