I have a "Car Battery" type UPS rated for a max of 750W

(litteraly, it looks like a car battery when I open up the case)
I have my main system, pump, and monitor plugged into it and it works fine.
As a matter of fact I have (3) UPS devices; one for main system, one for server, and one for DSLs and Router. One day the power went out for who knows how long and when I came back, the only devices that survived without loosing power was my main machine; the POWER monster!
BTW All of the UPS i have I got for FREE!!!!

I love the perks of my job...........sometimes.