This caused a failure in my car's switchpack, which caused a non-start condition. It's NOT covered under warranty (so far). This repair will cost me thousands. In the Tesla "engineering blog" there is an instruction not to ever plug an AC inverter into the Tesla, but there, as far as I know, is no such warning in the user manual. I informed Tesla that I was hoping I could convince them to defeat the 5 minute limit for the DC power jack after the car's turned off, and told them that the purpose was to continue power devices inside the car such as chargers and cameras, and that that time I was not warned about using an inverter. Naturally, I'm pretty steamed about this. I've now been told that "everyday" use (whatever the &^%$* that means) of chargers and other devices will not harm the car, but sine wave inverters are not allowable. The problem is that the inverter I used produces spikes in voltage (as much as 19V) that corrupt electronics in the car. There is apparently insufficient filtering on the DC power socket. I asked whether anything else might cause damage, since almost all power supplies these days are switchers, and was given an answer that did not sound very reassuring: "It shouldn't." What about "won't"? I'd like to get a list of approved devices from Tesla. I just called them and told them so. This is infuriating. Basically, they're so much as telling me "Don't use the 12VDC socket. It's not for customer use."