What is behind-the-meter power?

The meter is the boundary between the utility grid and a customer’s site. Power produced on the grid side and delivered to you is front-of-the-meter. Power produced on your own side — and consumed there without passing through the utility’s meter — is behind-the-meter (BTM).

The distinction matters because the two sides operate under very different rules and timelines. Front-of-the-meter power requires an interconnection agreement, transmission capacity, and often years of queue waiting. Behind-the-meter generation, sized to serve the on-site load, can often be built and energized far faster because it sidesteps much of that process.

A behind-the-meter data center pairs its compute load with on-site generation sized to cover it. Common approaches include:

• Gas turbines — aeroderivative or heavy-frame units that provide dispatchable, around-the-clock power.
• Geothermal — where the geology allows, wells tapping subsurface heat for generation, plus closed-loop systems for cooling.
• Solar, storage, and fuel cells — often blended in, though intermittent sources usually need firming.

The site may run fully islanded (off-grid) or stay grid-connected for backup and to export surplus. The defining feature is that the primary power is produced where it is used.

Two forces are pushing large energy users behind the meter. First, the grid is full: interconnection queues stretch years, and in fast-growing regions there simply is not spare capacity to connect a new gigawatt-scale load on demand. Second, AI timelines are compressed — operators want to energize campuses in months, not the half-decade a grid upgrade can take.

Building your own power converts a permitting-and-queue problem into a procurement-and-construction problem, which a well-capitalized operator can move on directly. It also gives more control over cost, reliability, and — with the right generation mix — water use and emissions.

Behind-the-meter is not free of friction:

• Capital and operations. You now own a power plant — its capex, fuel, maintenance, and permitting (air permits, water rights, mineral leases) become your responsibility.
• Generation choice is geology- and market-dependent. Gas is fast and dispatchable but fuel-exposed; geothermal is durable and low-cost to run but only works where the heat is.
• Equipment lead times. The fastest-moving constraint has become the hardware itself — gas turbines in particular are booked years out.

The practical answer is often a blend: fast-start generation to energize now, with longer-lead or lower-cost sources phased in over time.