I'm running two computers off a single battery backup and I'm having problems with overloading. So obviously I need a bigger battery or just a seperate battery for each computer. My current battery is has 1100 watts or volts whichever it is....and I'm running a G5 2.5 quad with two SATA 500 gb drives, the Nvidia 7800 graphics card and 6.5 GB of ram---the other computer on the battery is a dual 2.4 Xeon PC with 1 gig of ram, 5 IDE drives (ranging from 200-300 gb a peice) and 5 SCSI drives....and when both computers are at full load my battery starts to scream at me.... I have a second battery that is 720 volts or watts, but that one is too small to power my PC.....how much power does the G5 need? Will it run off of my 720 battery? thanks!!