Microgrid vs behind-the-meter.

A microgrid is a self-contained electrical system that can disconnect from the utility grid and run on its own. Behind-the-meter dedicated generation is a plant built to serve one load directly — often with no grid connection at all. Backup gensets are emergency machines that run only when everything else has failed. The three get used interchangeably in conversation, but they are different tools for different problems.

Microgrid: grid-attached, islandable

A microgrid normally operates connected to utility service, drawing on the grid as its primary supply while its own resources — generators, batteries, sometimes solar — optimize costs and stand ready. Its defining ability is islanding: when the grid fails, the microgrid separates and carries its loads alone. Campuses, hospitals, and military bases use them this way. The grid remains the workhorse; the microgrid is insurance with an economics side hustle.

The word has stretched with popularity — vendors describe almost any on-site energy system as a microgrid — but the anchor definition holds: grid-attached in normal operation, islandable when it matters.

Dedicated BTM generation: independent by design

Behind-the-meter dedicated generation inverts that relationship. The plant is the primary and permanent power source, sized for the load with redundancy, and it may never touch the transmission grid. Nothing was interrupted and restored; there was never a utility feed to lose. The point is not resilience against outages — it is speed and control: capacity on the buildout's schedule rather than the queue's. A power foundry is this category taken to full scale, with the fuel supply built in.

Backup gensets: the last resort

Standby generators — typically diesel — exist for one job: ride through an outage. They are permitted for limited run hours, fueled for hours or days, and not designed for continuous duty. Every serious data center has them, and no serious data center plans to run on them.

Confusing gensets with primary generation is where taxonomy errors get expensive. Emergency machines carry emergency permits and emergency economics; scaling them into a primary supply means redesigning both.

Which one fits

The right tool follows from the question. Protecting a grid-served facility from occasional outages: gensets. Adding resilience and cost optimization to a load that keeps its utility service: a microgrid. Securing hundreds of megawatts of firm capacity when the interconnection queue would otherwise set your schedule: dedicated behind-the-meter generation, with its trade-offs covered honestly in the cost math.

About Corley Energy

Corley Energy is a behind-the-meter independent power producer, founded in 2024 by Jake Corley, Tim Bozeman, and Mark Meyer. We convert stranded Permian Basin natural gas into firm, contracted electricity for AI data centers at Power Foundry, our ~1,000-acre development in Upton County, Texas. Start with what a power foundry is, see the company facts, or check current capacity on the Sites page.

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