Originally Posted by swj123

I just bought a nice 2016 370z roadster. When I bought it the the guy said I don't know if the AC works I never tried it. The next day I was driving and turned on the AC and all is fine for a while. Then it happened. It quit charging and battery went dead. From 14v to 12v after running AC 30 minutes or so. Got new Battery. It's like something is overheating the alternator. Too much draw from the AC?