Grid interconnection vs Behind-the-meter generation
Host-utility load studies, agreements, upgrade scopes, and firm-service milestones are project-specific. Compare their dated energization path with turbine procurement, site, fuel, emissions, protection, and operating approvals; the schedule value is material because SemiAnalysis's contested estimate puts AI-cloud contract revenue at roughly ~$12–13B/GW-yr of contracted critical IT, gross, while ~90 GW announced of behind-the-meter generation has been announced.
| Axis | Grid interconnection | Behind-the-meter generation |
|---|---|---|
| Speed to power | host-utility studies, agreement, network-upgrade scope, power rights, and firm-service milestone are project-specific | Enverus's market estimate for delivering a new aeroderivative turbine is ~40 mo (the OEM's dated quote governs a real order); site, fuel, emissions, protection, and operating approvals remain separate clocks |
| Cost certainty | known tariffs / PPA structures; basis and shape risk manageable | fuel price exposure for the asset's life; hedging is on you |
| Regulatory risk | large-load rules are changing mid-queue (ERCOT's Batch Zero audit pause; FERC's rejection of PJM's curtail-first interim service for new large loads); budget for rule changes as well as delay | air permits (~60 days-12 months (Region 8 indicative estimates)), co-location fights at FERC, local opposition |
| Reliability posture | grid + backup generation, the classic stack | islanded operation is a serious engineering program (Ch 4.8), not a procurement line |
| Carbon story | can contract 24/7 CFE, nuclear PPAs (up to ~13 GW announced contracted) | gas BTM retains combustion and fuel-chain emissions; SMR company targets need project-specific delivery evidence |
| Endgame | the destination — cheap, firm, someone else's spinning reserve | usually a bridge: island today, interconnect later, redeploy the turbines |
Quantitative cells are the guide's canonical figures — each is date-stamped and sourced in the numbers register and derived in the chapters below.
How the decision falls
The current winning structure is rarely either/or: it is grid-plus-bridge or co-located hybrid — BTM generation to energize years early, an interconnection application running in parallel, and contracts that let the bridge redeploy. Underwrite the portfolio, not a single supply.
What would flip it: An interconnection queue short enough to erase the schedule advantage, or sustained high gas prices, flips the bridge economics.
Model this fork with your own numbers: Project-finance IRR calculator →
Full derivations, worked examples, and the numbers behind this matrix: Energy supply strategy: the four structures (Ch 3.4) · On-site and BYOP generation (Ch 3.5) · The power-bound era (Ch 16.1)