I don't know if this question is suitable for ServerFault, but here it's anyway.
I brought what's called power-inverter connected it to a battery charger to test how many amps my computer uses, so I found out it uses 10 amps (per what I don't know).
so anyway, I bought a 100amps car battery, connected it to the inverter and now it's capable of running my computer for 1.30 hour only.
The inverter itself is 1200 Watts (I tried 1000 watts inverter & it got really hot it's cables nearly melted down).
I am running AMD 1090T, 16G DDR 3 RAM, 2X 1 T.B Green Energy W.D HDD on windows 7 x64bit. ThermalTake PSU 600
What I'm doing wrong? I need something that will last for 5 hours at least instead of an hour & half.