Can you run 2 power inverters in cigarette lighters in a car or will this cause a problem?

Question

I am going to be going on a trip and i have 2 laptops that i would like to plug in and i was going to buy two 75watt inverters to accomplish this. Wll this work or will it cause a problem with the electrical or cause a fuse to blow or anything like this?

Answer 1

75 W at 120 volt is approximately 0.62 Amps. With a 12 volt input at approximately 6 amps (in this example 1/10 the output current takes 10 times the input current).

The total draw should be somewhere in the neighborhood of 12 amps - check the fuse for the lighter circuit - if it's 15 amp or greater, you should be fine.

Answer 2

As long as you do NOT draw more AMP than the fuse can supply, that is NOT a problem.

Most cars will have 10 to 20 amps (that is 120 watt to 240 watt).

Good Luck...

Answer 3

Wattage = Amps times voltage

multiply the cigarette lighter fuse amps by 12 volts. That will tell you how many watts you can pull. For example if it is a 30 amp fuse, you can pull 360 watts.a 15 amp will allow 180 watts. a 15 amp or larger fuse would allow the two 75 watt inverters. and allow a little for surges (by a couple spare fuses).

Then you need to know how much power the laptops require. 75 watts is about 6 amps at 12 volts, and that will translate to .6 amps at 120 volts. Then the inverters will also use some current themselves.

Answer 4

its might blow the fuse most only have a 15amp fuse

Answer 5

Should work okay so long as you don't exceed 150watts (the limit of cigarette lighters according to crutchfield)