Between 1100 and 1200Wh. DL580 is using about 700Wh, Dl360e about 200Wh, and R610 about 250Wh. The power usage fluctuate a bit due to temperature and usage, but is around that value. In the future I plan to make a DIY metered PDU. To be able to monitor the power usage of every server. I plan on using it to also detect issues in workflow by monitoring the power usage.