AFAIK from reading many of these posts, TSLA has produced no explanation for its problems, and multiple causes are suggested.
Most , like the post below, report kW rates that may sound OK to a LEAF driver, but still mean waiting several hours for a most-of-a-pack charge for a Tesla.
Degraded superchargers are a continuing problem
I took a road trip from LA to Vegas, and experienced 40 kW max at both Redondo and Primm superchargers. I was not sharing a stall pair, it was around 80*F, and charging in the 10-40% range where my car normally gets 100-110 kW (which my car got just fine the next day). After my trip, I called customer service and the rep was able to instantly look up supercharger info and confirm that those locations were degraded, and he could see everyone else getting <40 kW. Why can phone reps see this info instantly but we can't? Max charge rate and degradation should be added to the "stalls available" info on the touchscreen map so we can plan around the problems. I was late to work and had passengers, so this gave their perception of Tesla a black eye. Also this was my third road trip this year where I've run into this, so the individual supercharger problems really need to be fixed faster because it's way too common, especially with the mass production of model 3's starting soon...
https://www.reddit.com/r/teslamotors/co ... g_problem/
https://teslamotorsclub.com/tmc/threads ... 32/page-19
charging slow at Superchargers
https://teslamotorsclub.com/tmc/threads ... 394/page-7
Has there been any clarification on Supercharger throttling...
https://teslamotorsclub.com/tmc/threads ... 619/page-4