Should just be a matter of plugging it up and then plugging your computer(s) into it. I have had no luck with either CyberPower's or APC's " cheap " UPS systems, so I stick with either Cyber's " PR " line or APC's " SmartUPS " line. These units are easily 3 to 10 times the cost of their basic units though. One thing to consider is that the runtime on battery power will be a lot lower than their expensive units, which usually have twice the number of battery cells. I wouldn't expect the battery to last more than three years for any UPS. My rule-of-thumb is no more than a 60-70% load on the UPS. In your case with an 810 watt UPS, I would not have a PC on it that would consume more than about 550 watts at full load. Not many PC's would hit that, unless it was something like a 2600K/3770K with a pair of GTX 670/680 or comparable AMD system.