US Grid Constraints: Towards 40GW+ of Behind-The-Meter Datacenter by 2028?
SemiAnalysis Twitter · SemiAnalysis (@SemiAnalysis_) · 2026-06-25
SemiAnalysis forecasts that US electrical grid capacity will fall critically short of AI datacenter power demand, driving Behind-The-Meter generation to supply more than 50% of new US datacenter power by 2028 and creating a TAM exceeding 50GW per year by 2029.
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Extraction
Topics: datacenter-powerbehind-the-meterus-gridenergy-infrastructureai-infrastructure
Claims
- US grid headroom is approaching zero and will turn negative by 2027, making it unable to meet growing datacenter power demand.
- US datacenter gross power demand is forecast to grow from +21GW in 2026 to +84GW by 2030.
- The US grid is only adding approximately 15GW of net-new firm capacity annually, far below what datacenters require.
- Behind-The-Meter power will supply more than half of new US datacenter capacity by 2028, with a TAM exceeding 50GW per year by 2029.
- Developers seeking grid-connected power are increasingly required to post large financial commitments — letters of credit, security deposits, or take-or-pay contracts — and still face multi-year delivery delays.
Key quotes
Behind-The-Meter [is] the only way for the largest players to secure the power they need.
Available headroom is already approaching zero and turns negative by 2027, based on our analysis of required reserve margins across the country.
BTM will power well over half of new US datacenters in 2028+, and the Total Addressable Market (TAM) for DC BTM equipment to cross 50GW/year by 2029.