You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I am charging on a NEMA 14-50 on a (dedicated) 50 amp breaker and had the car set to charge at 40 Amps but it reset to 30. At first I thought it was the recent software update but it did it again today. I seem to recall someone else posting about this but couldn't find it. Any ideas?
Yeah. There have been several threads over the years. This (Anyone Still Experiencing Charge Current Limiting (40A->30A)?) was the latest.
I have had this issue with my car since the Dec 2013 firmware update.
My setup is perfectly-wired (performed to code by my electrician father and inspected by Tesla-endorsed electrician, dedicated-circuit, dedicated-meter, only a short <1-foot run of wires. The voltage reading is regularly between 240-246V and is super-stable as there is nothing else on the circuit and everything is brand-new and short.
Tesla could not solve this and I have pretty much resolved myself to living with it.
I thought you weren't getting 240V or more, no?Thanks for the thread link. It's good to know that I am not alone. My car, wiring, charger, plug, etc. are all new and everything is correctly installed. So it must be a quirk of the software or an overly cautious safety check. Oh well, good to know its normal-ish. Thanks.
The pilot signal is what tells the car which adapter is connected. The UMC reads a resistor from the adapter, figures out the corresponding amperage, and then generates a J1772 pilot signal for that amperage. Without a pilot signal, the car would have no idea what it could safely draw, it could be far below 30A, or the EVSE could be trying to indicate an error over the pilot wire.
Plugging and unplugging can introduce metal dust and oxidation into the interface between the mating surfaces and create a sort of resistor there. In olden days (1970s) I worked for Packard Electric (now Delphi Packard, GM's old wiring division), and one of the ways we could get connectors to fail (especially when they carry a lot of current) was to mate and unmate them a few times.Could it be the constant plugging and unplugging of the cable that is causing it to not have as good of a connection?
I thought you weren't getting 240V or more, no?
Have constant 239-243vYou are correct. I was seeing 230V, but, my understanding is that +/- 5% volts is an acceptable variation.