It goes off when going to sleep after about 20 minutes - basically the same time as the factory amp.Are you saying it turns off right away, or when the vehicle goes to sleep and turns off the factory amp?
Mine is would also turn off when going to sleep but that draw on the larger 1,000 watt amp for ~10 minutes was enough to drain the 12V battery after a few weeks.
Keep us posted, thanks!
Are you using the NVX amp? I ran the 500RMS version for 2+ years in my Model 3 and never had it drain my 12v. However, that was with signal sense and maybe it was shutting off real quick. (I had never checked).
Will keep you posted!