PUE (total facility power divided by IT-load power) affects effective MW capacity and tenant attractiveness for re-lease. A 50 MW utility allocation translates to 42 MW of IT load at PUE 1.20 and only 33 MW at PUE 1.50. Modern hyperscale designs target 1.10 to 1.25; legacy designs above 1.5 face cap -rate discounts.
How PUE affects the financing math
PUE directly determines how much of the contracted utility allocation actually becomes revenue-generating IT load. At PUE 1.20, a facility with a 50 MW utility allocation supports about 42 MW of IT load; at PUE 1.50, the same allocation supports only 33 MW. That 9 MW gap is meaningful revenue at typical hyperscale rents.
Lenders also treat PUE as a forward-looking obsolescence variable. Tenants increasingly write PUE caps into their leases and will not extend on facilities that fail efficiency targets. The DOE Better Buildings program publishes target PUE benchmarks by climate zone that lenders use as a reference for new construction underwriting.
Sources
- Better Buildings Data Center Accelerator and Challenge · U.S. Department of Energy · current
- Powering Intelligence: Analyzing Artificial Intelligence and Data Center Use of Electricity · Electric Power Research Institute (EPRI) · current