Around 700W on low load, almost idle. Haven’t had the chance to test it at full load yet.
It sits in my basement, so the waste heat is actually useful this time of year. Even more so when my basement would otherwise be freezing.
I plan on implementing scheduling where the two most power hungry servers are powered down and up as needed. The other two take almost nothing.
Also, the UPS supports a green mode that is a lot more efficient but with a downside of output side dropping out a few ms during switchover. This removes any conversion loss. I haven’t tested whether my hardware can tolerate it yet, so for now I’m living with the conversion loss.
My house is powered by cheap hydroelectric supply, generated in a mountain roughly 5km from my house, so I’m not worried.