I had a situation with my 2016 FFE that I have never experienced before, and searching the Forum for help didn't yield any results, so I thought I would post the background and my resolution. After running a few errands, I parked my FFE with about 40% of the charge left. About 20 minutes later, I was going to run another errand, and all the electrical in the car was off. No dome lights, courtesy lights, etc. The first indication is that I could not unlock the car. I sued the key in the FOB (thank you Forum posters for explaining that). I searched the Forum to see if there was a "Master Switch" like a circuit breaker that needed to be reset- no joy. Several posts mentioned dead 12v batteries, however I have never had battery issues, left nothing on in the car, and had just driven it 20 min earlier. I used a volt meter to check and indeed I had 12.8 volts across the battery.
Unsure what to try next, I disconnected the positive terminal from the 12v battery and waited about 5 minutes to see if there was some capacitance or electronics that needed to be reset. To my pleasant surprise, the car appears to work fine after reconnecting the battery. I will now carry a wrench in my glove box that fits the size of the battery lug incase I'm in a parking lot when this happens. I am glad I wasn't driving it when this happened!
Has anyone else had this kind of issues. The only thing out of the ordinary is that it has been pretty warm (high 90's low 100's) this past week, but I wouldn't suspect that or anyone who lives in Phoenix would experience this most of the year
Thanks again for the great Forum