4kVA

Currently I have 4kVA of battery backup across 3 units. It's pretty impressive actually but the displays say run time is about 15 minutes. That is under pretty heavy load though so even if I'm playing a game it will last a while. The lights will go out except the glow from the monitor.

There is a warning on them that the output is not sinusoidal although it hasn't really seemed to matter.