Will a quick-fix help with a charge rate reduced Tesla warning?
Posted By RichC on June 25, 2026
About 20 years or so ago, I installed a 50A 240VAC breaker and outlet in our pool garage where I used it for both a TIG and MIG welding setup. It has been working fine for years, but has been used
somewhat infrequently for welding compared to charging an EV. Now that we are using it daily with the Tesla Mobile Connector (with the appropriate pigtail) as our primary (and only) way to home charge our Brenda’s Tesla Model 3 it has started to trigger app warnings during longer charge cycles.
Initially I thought it might be a fluke, but Drew noticed it on his Model S during their last visit too. Hm … this required some digging since I didn’t notice any breaker, conduit, plug or cord overheating (at least to the touch). What happened though is that the Tesla app warns and backs down the amps … creating a much slower charge (see above warning and stepping down to 16A). I noticed it when I expected a full charge during a recent trip and ended up with less.
So, I started pricing out a Tesla Wall Connector ($485) plus an electrician ($804) AND a compatible Siemens tandem breaker ($238) to create panel space (currently maxed out). Hm, maybe I’ll stick with the Mobile Connector and pigtail plug a little longer. After chatting with an electrical friend (not licensed) he suggested that I might try buying a new plug and swapping it out as the tension may not be a tight after plugging things in and out over the years. Good idea.
But before that, I decided to give one more thing a try. Perhaps there is some corrosion on the clamping brass that holds the Mobile Connector prongs? So off with the breakers and in with a little sandpaper on a file. I’m not sure it did anything about the tension (if that is the problem) but it might be worth a try before purchasing a new welding plug.







