I’ve got a R620 and it’s an outstanding box for labbing. I only keep it on when I need to use it, and it’s in my basement for the noise issue. I max out at 300 watts with everything started, 170 idle.
I turn it on with the idrac when needed or with Home Assistant.
Here’s another great source for PVE scripts.
https://tteck.github.io/Proxmox/