Installed a 40A wall-mount charger myself this spring in the garage, used heavy-duty drywall anchors rated well above the unit's weight since there wasn't a stud lined up where I needed the mounting height. Four months in and there's visible cracking in the drywall radiating out from two of the four anchor points, and the whole unit now shifts something like half an inch side to side every time I plug in or unplug — you can watch it move if you're looking at it. My wife is, understandably, not thrilled about a chunk of the garage wall looking like this four months after I told her I had it handled.
I've got an EE background so I trust my read on the electrical side of this install, but I'm second-guessing the mechanical mounting entirely. Was this always headed here with a heavy wall unit on anchors instead of a stud, or is a 40A charger just inherently going to do this to drywall regardless of what it's screwed into? Trying to figure out if I need to actually find a stud and redo this properly, or if a lighter unit at the wall side would've sidestepped the whole problem.
