I recently took a road trip in my 2016 Model S 75D. Before leaving for the trip I decided to top off at my office charger, a Clipper Creek 60-amp with a J1772 connector. When I plugged in I noticed an "Unable to Charge" warning on the dash, but it throttled up and started charging anyway. It topped off at 24amps, however, instead of the 48 that it was capable of. I assumed something was wrong with the charger and went on my way. However, at the hotel I stayed at I noticed the same issue on their destination HPWC. It wasn't a big deal because I had all night to charge, but still, strange. I wondered if it was just a coincidence as hotel chargers can be a little rough. Returning home, however, I found that I was getting the same error on my home HPWC and figured it was a problem with my car. Who knows how long it has been a problem, because I charge all night and there is plenty of time to get a full charge at 24amps. Supercharging worked fine throughout the road trip. I made an appointment for mobile service and the tech messaged me and said everything was checking out on their end. He encouraged me to do more testing, and lucky me, I also have a Model X at home. I tried that on my other charger and sure enough, a very similar issue. I was getting the error but the car would still throttle up and charge full speed. At that point I cancelled the appointment and figured I'd test some more. Not long after I had an electrician at my house for a different project and I asked him to check out my chargers. He took a look and was satisfied that everything was hooked up correctly, but admitted he did not have any expertise on the chargers. We both left figuring there might be something wrong with the HPWC units themselves (I have two and both were causing the issue). As a last test I decided to go out and find another L2 charger nearby and found that I was still getting the same issue. At that point I was convinced that there was something wrong with the car, but what are the odds that both of my Teslas encountered the same issue at the same time? I began to suspect a recent software update might be to blame. I've been researching and have noticed several other people with this issue popping up lately. I wanted to start this thread to try to collect them in one place and see if we can figure out what we all might have in common. See these related discussions: Am I the only one getting false unable to charge message | Tesla "Unable to Charge open charge port and press brake pedal and try again" | Tesla Unable to charge disconnect cable and retry message "Unable to charge - Disconnect cable and retry" - fixed Could this all be related to recent updates regarding the fire in Shanghai? Tesla Model S Shanghai Fire, Range, And Charge Issues Seem Connected Tesla pushes battery software update after recent fires I suspect that the cars are now much more sensitive (too sensitive) to voltage drops when charging starts. Anybody else?