Last updated: August 13, 2026
On-Site & Behind-the-Meter Power for Data Centers, Explained
When the grid interconnection queue takes five years and a hyperscaler needs capacity in two, some developers are building their own power plants instead. Roughly 2 GW of behind-the-meter generation capacity was online as of mid-2026, and that figure is growing fast — here's what it actually means for site selection.
⚡ TL;DR — What to Know About Behind-the-Meter Power
- • What it is: on-site generation (usually gas turbines) powering the facility directly, never touching the public grid
- • Why now: primary-market grid interconnection waits now average 4+ years, versus roughly 2-3 years for on-site generation
- • Scale today: ~2 GW of BTM capacity online mid-2026, projected to reach 2.8–3.2 GW by year end
- • Largest example: xAI's Colossus 1 & 2 near Memphis, roughly 1,500 MW of operating on-site gas turbine capacity
- • What it doesn't skip: zoning, land use review, and air permitting — BTM avoids the interconnection queue, not the rest of the approval process
Why Developers Are Bypassing the Grid
The math is straightforward once you see the timelines side by side. Grid interconnection for a large load now averages more than four years in primary data center markets, with a national median around five years and some regions running longer — see our full interconnection queue guide for why that process has gotten slower. On-site generation, by contrast, can typically be delivered in two to three years because it doesn't require a formal utility interconnection study or approval before construction — the power never touches shared infrastructure, so there's no queue to wait in.
That speed comes at a cost. On-site gas generation is generally more expensive per megawatt than grid power, and a developer taking this route is making a bet that speed-to-market outweighs the premium — a bet that's increasingly common given how much AI compute demand has outpaced utility planning cycles.
How Big Is This, Actually
As of mid-2026, roughly 2 GW of behind-the-meter generation capacity is operating nationally across a small number of projects, with xAI's Colossus 1 and 2 facilities outside Memphis making up close to 1,500 MW of that on their own — the largest single concentration of on-site gas turbine capacity tied to one operator. Industry estimates put total operating BTM capacity at 2.8 to 3.2 GW by the end of 2026. Turbine manufacturer GE Vernova has said it expects roughly 20 GW of annualized gas turbine output in 2026, with continued growth through 2028 — a supply-side signal of how much this segment is scaling, even if not every turbine ordered ends up behind a data center meter.
What This Means If You Own Land
A BTM strategy shifts which infrastructure matters most on a parcel, but it doesn't remove requirements — it swaps some of them. Natural gas pipeline access and capacity become as important as electrical transmission proximity was for a purely grid-connected site. Water still matters if the cooling design uses any evaporative component (see our water and cooling requirements guide). And a site still needs to clear zoning and land use review — see zoning and permitting for data centers — plus air permits for the turbines themselves, which can be slower and draw more local opposition than a standard industrial permit. If you're marketing a parcel, knowing whether it has usable gas pipeline access nearby is now a relevant selling point alongside the traditional substation and transmission story.
When on-site power is NOT the right call
BTM generation makes the most sense for a developer under real time pressure who can absorb a cost premium and manage the permitting and community relations around on-site combustion equipment. It's a weaker fit for a project with a longer runway, tight capital constraints, or a location where local air-permitting resistance is likely to be significant — in those cases, working through the standard interconnection queue, or targeting a site with documented existing grid capacity, is often the more predictable path. There's also a real long-term risk worth naming plainly: a developer that builds an on-site gas plant to solve a near-term gap may end up operating it indefinitely if a cost-competitive grid connection never materializes, or may have paid a speed premium that a since-completed interconnection makes look unnecessary in hindsight.
Frequently Asked Questions
What is behind-the-meter power for a data center?
Behind-the-meter (BTM) power means the generation equipment — usually natural gas turbines, sometimes paired with batteries — sits on-site or immediately adjacent to the facility, and power flows straight from that equipment to the data center's load without going through the utility's meter or the public grid at all. It's functionally a private power plant built to serve one customer, as opposed to grid-connected power that's generated somewhere else on the system and delivered over shared transmission and distribution infrastructure.
Why are data center developers building their own power plants instead of connecting to the grid?
Timing, mainly. In primary data center markets, average waits for a new grid connection now exceed four years, and the median large-load interconnection timeline nationally runs around five years from request to commercial operation — with some regions stretching to seven or more. On-site generation can come online in roughly two to three years and doesn't require a formal interconnection study or utility approval before construction starts, since it never touches the shared grid. For a developer racing to meet AI compute demand, that gap is often decisive even though on-site generation usually costs more per megawatt than grid power.
How much behind-the-meter generation capacity is actually in service?
As of mid-2026, roughly 2 GW of behind-the-meter generation capacity is online across a handful of projects nationally, with xAI's Colossus 1 and 2 facilities outside Memphis accounting for close to 1,500 MW of that — currently the largest concentration of operating on-site gas turbine capacity tied to a single data center operator. Industry estimates put total operating BTM capacity at somewhere between 2.8 and 3.2 GW by the end of 2026, and turbine manufacturer GE Vernova has said it expects to reach around 20 GW of annualized gas turbine output in 2026, with further growth targeted through 2028 — a rough proxy for how fast this segment is scaling.
Does behind-the-meter power change what a landowner's site needs to offer?
It shifts the emphasis but doesn't eliminate the underlying requirements. A BTM-powered site still needs adequate acreage, water access if the design uses any evaporative cooling, and — critically — natural gas pipeline access and capacity, which becomes as important as electrical transmission proximity was for a grid-connected site. It also still needs air permits for the on-site turbines, which can be a slower and more locally contentious process than a standard industrial permit. A landowner shouldn't assume BTM makes a site's power situation irrelevant; it changes which infrastructure matters most.
What are the real risks or downsides of behind-the-meter power for data centers?
The most-cited long-term risk is stranded-asset economics: a developer that builds an on-site gas plant to solve a near-term power gap may end up running that plant indefinitely if grid interconnection never becomes cost-competitive, or conversely may have paid a premium for speed that a delayed grid connection eventually undercuts. On-site gas turbines also face real air-permitting and local community pushback in a way that a grid-connected site — where the emissions happen at a power plant elsewhere — generally doesn't. And BTM generation is still subject to zoning and land use review; it's a power strategy, not a permitting shortcut.
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