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Q&A: Can i run my car accessories off a 120vac line when the cars off?
I have a nice stereo and i want to be able to turn my car off and run the stereo for a long time. The battery dies after about 30 minutes so i wanted a way to plug the car accessory into a household outlet. The car draws about 960watts. Thats 60amps on a 12Vdc. Some ideas i had were… 1: plug the 120Vac into the alternator that then converts the alternating current into direct current. 2: put a computer power supply in my car that has a 60amp 12Vdc rail. 3: Buy a very expensive (i cant actually afford it) 12Vdc power supply. 4: use a jump start system that can be plugged into the house outlet and the car at the same time. (would that draw the power off the house?)

The answer in the following:

Answer by sapper345
NO NO NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer by jon L
run your computer in the house , you car accessories will run your battery down with the car not running

Answer by Jeff
no. u will kill ur battery if u do if the cars off.

Answer by henry i
Try your option 2, but disconnect the battery

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