u/kumaclimber

Howdy, I've got a server rack that consumes an average of 500w per hour and I'd like to get it off my power bill because it's costing me a bit more than $50/month. I'd like to find the cheapest way to make that happen. My main requirement is this needs to be backed up by the grid. I don't know much here so any help would be useful. I'm in Portland Oregon.