You can measure how badly the grid is failing AI by reading engine manufacturers' order books. The behind-the-meter buildout is now a multi-gigawatt supply chain in its own right — and it is what makes a 2027 power date believable.
INNIO, the Jenbacher gas-engine maker, has booked three landmark datacenter orders this year: 1.5 GW with VoltaGrid for 300 engines packaged into 25 MW modules (February), roughly 1.1 GW for more than 200 J624 engines to a mega-campus developer (July), and a further 450 MW for behind-the-meter prime power in North America (September). All three are scheduled for delivery by 2028, and every one is for prime power, not backup. Wärtsilä's 412 MW Ohio order and the aeroderivative turbine wave tell the same story on the other side of the market.
The reason is the queue. ERCOT is sitting on an estimated 474 GW of interconnection requests, 90% of them datacenters, and Texas has frozen new grid approvals pending an audit due mid-December. PJM is studying a limited fast-track for a handful of large loads every two years. FERC has told grid operators to accommodate behind-the-meter generation. Developers heard all of that and ordered engines.
The trade-off is real: on-site generation costs more per MWh than utility service and carries fuel, permitting and O&M risk. But it collapses the schedule from five-plus years to under two — and more and more of the 2028 capacity pipeline is being planned as hybrid or islanded from day one.
What it means if you're buying: A site's power story is now its delivery date. "Grid in 2030" is a land deal; "gas lateral under evaluation, engines on order, grid as the second tranche" is a datacenter. When you underwrite a powered-site listing, look for the pieces that actually move the schedule: pipeline proximity and capacity, air-permit status (attainment area or not), engine or turbine procurement, and whether the utility tranche is verbally confirmed or in a signed service agreement.
What to do about it: SIRIUS 1000 (~2,000 acres in Alabama, 600 MW Alabama Power in 24 months, Energy Transfer gas near site for behind-the-meter first power in 2H 2027, scaling to ~1 GW) and PERSEUS 20 (20 MW existing plus gas expansion in Texas) are the hybrid plays live on the marketplace today; ARCTURUS brings 400 MW of off-grid power to its Charlotte-metro Rubin campus. Sellers with gas-adjacent land: the engine lead time is the asset now, so list before the 2028 delivery slots are gone.
Order announcements · innio.com ↗ · Summary and analysis by Ax3
