Data Center Power: A Practical Interconnection and Equipment Plan#
A data center power plan needs a documented path from expected computing demand to an operating electrical system. The critical path may include utility studies, transmission work, local permits, fuel supply, equipment integration and commissioning. Buying a generator resolves only part of that sequence.
The right starting point is a phased operating requirement: how much power the campus needs, when it needs it and which interruptions or limitations the business can accept. That requirement makes utility and equipment proposals easier to compare and exposes assumptions that otherwise remain hidden until construction.
This guide combines a dated regulatory snapshot with SecondWatt's recommended planning workflow. Regulatory references were reviewed September 25, 2026. Project-specific studies and agreements must establish the actual connection and operating requirements.
Key Takeaways
- Keep IT load, total facility demand, contracted capacity and generation output separate.
- FERC's large-load proceedings do not provide every project with a guaranteed connection date.
- Generator interconnection and service to a new electrical load follow distinct processes.
- Evaluate bridge generation against permits, fuel, integration and a defined exit plan.
- Release equipment purchases against documented project milestones and comparable package scopes.
Define the demand before selecting the supply#
Start with a schedule showing the opening phase, subsequent expansions and intended full build-out. For each phase, identify the IT load and the additional electrical demand associated with the facility. State whether the numbers are estimated, contracted with tenants or supported by detailed design.
Use consistent units. Megawatts describe power at an operating point; megawatt-hours describe energy over a period. As a simple arithmetic illustration, a constant 10 MW load running for 24 hours consumes 240 MWh. That calculation does not describe the capacity needed for redundancy, transient behavior or future expansion.
National demand research provides context, not a site design. LBNL's 2024 U.S. Data Center Energy Usage Report includes historical estimates and scenarios through 2028. Those scenarios describe potential future demand rather than measured consumption or the power available at a particular site.
For the project itself, document load variation as well as the peak. Ask the design team to identify expected operating states, startup sequences and credible changes in demand. These are inputs to equipment and system studies, not quantities that can be inferred from a national growth percentage.
Separate the four capacities in the project file#
| Capacity measure | What to record | Common comparison error |
|---|---|---|
| IT demand | Computing load and development phase | Treating it as the whole facility's electrical demand |
| Facility demand | The electrical boundary and included supporting loads | Mixing different measurement boundaries |
| Contracted utility capacity | The agreement, service conditions and phase | Assuming installed equipment establishes service rights |
| Generation output | Package, operating conditions and gross or net basis | Comparing catalogue output with required site-net supply |
A project can have a large eventual development target while opening at a much smaller load. Keep that distinction in the request for proposals. Suppliers need to know the initial operating case as well as the final target to evaluate equipment quantity, loading and future integration.
Likewise, distinguish installed capacity from the capacity available when equipment is unavailable for maintenance or another defined contingency. Ask the engineering team to state the design basis and demonstrate the relevant cases. A label such as “redundant” is not a complete performance specification.
What the 2026 FERC actions mean for planning#
On June 18, 2026, FERC launched regional large-load actions involving PJM, MISO, SPP, CAISO, ISO New England and NYISO. The orders sought justification or revision of tariff treatment. Their response deadlines were procedural milestones, not promises that individual campuses would receive power within that period.
The broader RM26-4 proceeding concerns large-load interconnection policy. A proposal or question in that record should not be presented as an effective, universally applicable service requirement.
Keep a project-specific register of the relevant proceeding, subsequent orders, effective tariff and utility correspondence. At each commercial decision, ask which documents actually control the next step. If a proposed change would improve the schedule, show that as a separate scenario until its applicability is established.
This avoids a common scheduling error: using the date of a federal announcement as the start of a fixed countdown to energization. Regional implementation, project studies and physical construction still require their own evidence.
Distinguish load service from generator interconnection#
FERC Order No. 2023 and Order No. 2023-A reform generator interconnection. They should not be used as the universal application guide for a data center seeking retail electric service.
Identify the proposed physical arrangement before assigning a process. A utility-served campus, an exporting generator, a co-located load and a plant operating in parallel with the grid raise different questions. A project may involve more than one of those arrangements.
For each case, ask the relevant provider which studies, agreements, protection settings, metering and operating limits are required. Establish who owns the application and who supplies the technical data. Keep the utility's requested assumptions aligned with the equipment specification as the design changes.
FERC's June 2026 PJM order summary also records further action on co-location service terms. A buyer should therefore use the applicable current documents, rather than a claim that the issue has produced no order or has been resolved uniformly for every project.
Compare supply paths using the same operating requirement#
Evaluate each option against the same load ramp, service requirement and financial boundary. Potential paths include utility supply, phased or conditional service where offered, and on-site generation. The feasibility of each is project-specific.
| Path under consideration | Evidence needed before relying on it |
|---|---|
| Utility supply | Documented service process, upgrade scope, agreements and energization dependencies |
| Conditional or flexible service | Actual offered terms, operating restrictions and business acceptance of those restrictions |
| On-site generation | Permit path, fuel arrangement, site-net performance and integrated electrical design |
| Temporary bridge plant | The same operating evidence plus removal, conversion or replacement arrangements |
| Combined approach | Defined import/export behavior and responsibilities across all operating modes |
Do not assume flexibility is available just because it is discussed in a policy proceeding. Ask the utility what arrangement it can offer and have the operating team assess whether the conditions fit the workload.
Similarly, an equipment delivery date is not a plant operating date. The schedule should show civil works, fuel facilities, electrical installation, controls, inspections and commissioning alongside shipment. Assign an owner to every dependency and distinguish a supplier estimate from a contractual commitment.
When bridge generation deserves further study#
Bridge power should have a defined purpose and exit condition. Examples might include supporting a particular phase while permanent infrastructure is completed or covering a documented gap in the development sequence. The choice requires evidence that the temporary arrangement can operate as intended.
EPA's data-center air-quality resources identify different engine and turbine requirements and the role of state and local permitting. Describing equipment as temporary, standby or bridge power does not establish authorization for the operating hours assumed in the business plan.
Ask the environmental and engineering teams to agree on duty, fuel, annual operating assumptions and site constraints before soliciting final offers. Review the fuel connection and delivery terms at the same time. A plant that is physically installed but lacks its required fuel supply does not solve the scheduling problem.
SecondWatt's mobile gas turbine bridge-power guide provides a useful equipment and exit-scope checklist. Model removal, continued use and delayed permanent service as separate cases rather than assuming the original end date will hold.
Specify the entire equipment package#
For a gas turbine, name the exact variant and package, required electrical output at site conditions, voltage, frequency, fuel and operating mode. Identify what the offer includes: generator, enclosure, controls, starting system, inlet and exhaust equipment, emissions controls and other auxiliaries as applicable.
Use the LM2500 and LM6000 model pages as starting points for research, then verify the actual equipment being offered. A family designation does not establish package completeness, current condition or performance at the proposed location.
The site derating guide explains the questions to resolve before treating a published rating as usable campus power. The fuel requirements guide helps organize fuel-pressure, quality and delivery questions for the package supplier and fuel provider.
For electrical integration, establish the required switchgear and transformer scope from the engineered one-line diagram. Clarify equipment ownership, interface boundaries, protection responsibility and test requirements. Separate those costs from the turbine purchase price so competing offers remain comparable.
Turn the plan into release milestones#
The project should not rely on a universal instruction to buy early or wait for every uncertainty to disappear. Instead, match each commitment to the evidence available and the cost of reversing it.
An early request for budget information can proceed with stated assumptions. A reservation should identify the equipment, conditions and cancellation exposure. A final purchase release should reference the agreed specification and the unresolved project dependencies that management has consciously accepted.
Track at least the following milestones: operating requirement approved, utility process confirmed, environmental applicability reviewed, fuel path established, package scope agreed, integration design advanced and commissioning responsibilities assigned. Some workstreams can overlap, but their relationships should be visible.
The gas turbine RFQ checklist can help prepare comparable requests. When ready to discuss sourcing, send SecondWatt the project requirement with the location, phased demand, electrical requirements, intended duty and target schedule. Specific information produces a more useful conversation than a request for a generic number of megawatts.
Frequently asked questions#
Does a FERC deadline determine when a data center gets power?#
No. A filing or response deadline is different from a project energization commitment. Build the schedule from the applicable process, agreements and construction dependencies.
Can national data-center demand forecasts size my plant?#
They provide market context. Plant sizing requires the site's load profile, electrical boundary, operating conditions and reliability design.
Is bridge generation always faster than utility supply?#
There is no universal answer. Compare complete schedules including permits, fuel, installation and commissioning, rather than equipment shipment alone.
Which turbine model should a data center buy?#
Begin with the operating requirement and site constraints. Compare exact packages on site-net performance, condition, scope and lifecycle obligations before selecting a model.