a very valid point though...

the master fuse is rated at 200A and the alternator is rated at 170A... so, I would say that the car can sustain 100 Amps, with a peak at 150A and burning hot at 200A after which, it is dead... (so, we have 1200W sustained, about 2000W peaking)

per my very rough estimate, I have added 2 inverters rated at 200 W sustained each (400W each peak), couple headrest monitors at 10W sustained each, will have a running detector at 5W peak, a DVR at 50W (i need to check the specs again), and few cameras at 1-3W each...

all of those would add about 500W if all of them are running at full capacity, which is, to power two laptops, watch both monitors, record all 8 cameras, charge 4 cell phones (5W stock chargers for 3 of them, 40 W for mine)... if I will run all 4 seat heaters, AC full blast, steering wheel heater, honk the horn, have front, rear fogs, high and low beams on... At this point i probably will blow a fuse or two, since i will not have enough juice to run this freak show!!!

a second battery could be in works... lol..