Im trying to calculate if a standard car battery will be able to run 2 computers, 2 monitors, and some small hardware, and if so, for how long. The entire configuration should be no more than 1000watts. (400 each computer, 50 each monitor, and 100 for small hardware). I cant seem to find how many watts a car battery will output. Since car batteries are 12v, Ill have to run everything through a transformer (12v -> 120v, 1000watts stable). Any help would be strongly appreciated.