BunnyRabbiy
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If you're talking about operating a stereo system that normally uses AC wall power, it's possible to do so from your car, but with certain limitations. First, you'll need a power inverter, available from almost any department store, such as Walmart, Best Buy, etc. They're fairly inexpensive.
But you do have to be careful about the power requirements, meaning wattage. Your car's cigarette lighter is fused at 10 amps, which at 12v means a maximum power of 120 watts. So if your amp is cranked up higher than 120 watts, you'll blow the fuse.
Now, let's say your power requirements are within limits. You still need to run your car or your battery will still run down over a small amount of time, and then you'll need a tow truck to jump start your car.
If your power requirements are higher and you decide to hook a heavier inverter directly to the car battery, keep in mind that your alternator probably puts out less than 60 amps, much of which is being used to run the engine. So mathematically, you have a possible 720 watts to work with, but in reality, it's more like 400 watts. If your amp still exceeds that 400 watts, then you run the risk of burning out your alternator, and you'll need a tow truck to drag your car home.
Your car battery was not made to power your car or any of its electrics. That's the job of the alternator. The battery's function is to power the starter. Sure, you can use it for light duty in some short term requirements, but you run the risk of wearing down or even damaging your battery for any extended use.
803 days ago
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