I cannot speak for others. There have been numerous cases where a Model 3 would not charge, period. Not from any source. We were in that camp earlier this year. Other owners of Models S and X have had similar experiences.
As you can see from various responses to your concern, there are a number of folks who are quite knowledgeable and helpful when it comes to temperamental issues with our vehicles.
In my opinion only, your headline bordered on the sensational, leading us to believe that your car would not take a charge at all from any source. Instead, your home set up with a Christmas light timer somehow threw a wrench into your charging ability. There is an ocean of difference between the car's charging system being totally kaput and an unconventional home set up that failed.
I also would have gone to another charging spot away from home like a Supercharger or a destination charger to see if the car would charge from those sources before I posted on here. In other words, do a little more detective work before asking for help.
Then, perhaps a gentler, more thorough headline like, "My car stops charging at home with an external timer" would have been more helpful and on point.
Regardless, glad that you were able to figure out the problem.
