Grid connection reference

How long does a grid connection take?

The answer depends on your site, requested capacity, the network work required and the delivery time of equipment such as transformers. Here is what grid operators and regulators actually report across the US and Europe, with sources beside each finding.

Sources reviewed: 7 September 2026 Coverage: US regions and European markets

United States: what the evidence shows

Berkeley Lab and GridTracker report a median of more than five years from request to commercial operation for generation projects built in 2025 in regions with available data. Their dataset excludes load connections, distribution-connected projects and behind-the-meter projects. This is generation context, not a forecast for an electricity buyer. Read Queued Up, 2026 edition.

Region	Official evidence	For your project
PJMMid-Atlantic and parts of the Midwest	PJM's generator process studies new generation and associated upgrades. Its separate large-load work addresses how to serve growing customer demand. PJM generation process (2025, PDF); large-load plan, 16 January 2026.	Ask the serving utility for the available capacity, required upgrades and delivery schedule at your location. A generation queue entry does not establish a new customer's energization date.
ERCOTMost of Texas	ERCOT's Batch Zero framework covers qualifying large loads of 75 MW and above. An August directive requires a data-center audit before projects advance. ERCOT, 18 June 2026; Texas audit directive, 3 August 2026.	Confirm the applicable process and current audit requirements with your transmission service provider. The threshold describes a study process, not a standard wait time or a guarantee for smaller sites.
CAISOCalifornia ISO footprint	CAISO states that utility tariffs govern new load studies, connections and cost recovery; CAISO does not study load interconnections under its generator process. CAISO large-load guidance.	Obtain a site-specific study and schedule from the local utility. Generator queue durations are not a substitute for its assessment.
NYISONew York	NYISO performs qualifying load system-impact studies with the connecting transmission owner. Facilities work and the load interconnection agreement are then handled with that owner. FERC's description of the NYISO process, 18 June 2026 (PDF).	Separate the study milestone from the facilities construction schedule. Ask the connecting utility to confirm when the requested capacity can actually be energized.
MISOMidcontinent region	MISO is developing a firm-service step-up process for partial load before necessary infrastructure is complete. It is a proposed approach, not a promise of immediate full service. MISO proposal, updated 3 August 2026.	Ask about the first usable capacity and the later full-service date separately, including any operating limits while network work is underway.
SPPSouthwest Power Pool footprint	SPP's high-impact large-load framework coordinates transmission, generation and load studies. Its published pathway targets agreements within 90 days; this is not an end-to-end construction timeline. SPP large-load framework.	Confirm eligibility, the study outcome, construction dependencies and whether service can be curtailed. A fast agreement can still require physical network work before power is available.
ISO New EnglandNew England	ISO-NE is developing large-load rules with participating transmission owners. Its July update, amended in August, describes continuing stakeholder and regulatory work. ISO-NE large-load update.	Check the serving utility's requirements and the status of any applicable new rules. The cited update does not provide a region-wide customer wait-time average.

Transformer shortage and lead times: equipment, not only studies

A service upgrade often waits on equipment as well as on studies. The US Department of Energy’s Office of Electricity reports that lead times for transformer orders, particularly distribution transformers, rose from three to six months in 2019 to 12 to 30 months in 2023, and that utility trade members saw average lead times for distribution transformers across all voltage classes rise 443 percent between 2020 and 2022, with orders that had taken two to four months taking 22 to 33 months. DOE Office of Electricity on transformer lead times (accessed 15 September 2026). DOE’s Large Power Transformer Resilience report to Congress, July 2024 covers the large-transformer class separately. Lead times differ by transformer class, voltage and region, and sources report them differently. For a site, the practical question is the delivery date of the specific transformer in the utility’s offer, not a national average.

Europe: location changes the answer

These sources report different measures: requested capacity, granted access, local reinforcement dates or connection procedures. They do not establish a comparable national wait-time average. The dates and scope below matter when using them for site planning.

Market	Official evidence	For your project
GermanyLocal distribution or transmission operator	Bundesnetzagentur describes flexible connection agreements that can limit power use, temporarily or permanently, where connection capacity is scarce. Bundesnetzagentur connection guidance (German).	Ask the local operator about firm capacity, flexible alternatives and the network works required. The guidance does not establish a national multi-year wait.
ItalyTerna and distribution operators	Terna's 2025 annual report describes almost 80 GW of data-center connection requests in its end-January 2026 market discussion. That is requested capacity, not connected demand or a measured delay. Terna 2025 annual report, p. 3 (PDF).	Use the requested volume as context for network planning. Obtain the actual connection offer and upgrade schedule for the site; requested capacity alone does not establish a delivery schedule.
Great BritainNESO and network operators	Ofgem identifies network and generation construction time, plus nonviable applications blocking viable projects, as causes of demand-connection delays. Ofgem demand reform update, 16 June 2026.	Use the connection offer for the requested site and capacity. A headline generation-queue volume is not a demand-connection duration. Ofgem and NESO cover Great Britain; Northern Ireland has a separate system.
FranceRTE and distribution operators	RTE offers a fast-track route at specifically approved sites near the 400 kV network, subject to land, network and congestion criteria. It is not a nationwide timetable. RTE connection and fast-track guidance.	Check whether the site qualifies and request its connection terms. For other locations, obtain the normal operator study and project schedule.
SpainRed Eléctrica and distribution operators	On 20 February 2026, Red Eléctrica reported 11.8 GW of demand access granted since 2022 that was not yet in service. It also began publishing demand-access capacity by transmission node. Red Eléctrica demand-capacity release.	Check the relevant node and distribution interface. Granted capacity is not energized capacity, and this snapshot does not reveal a typical customer wait.
NetherlandsNoord-Holland example	Liander's 15 January 2026 update places planned grid expansion in southern Noord-Holland in 2033–2036 and northern Noord-Holland in 2035–2038. It also reports some capacity becoming available around Oostzaan. Liander regional update (Dutch).	These are local reinforcement forecasts, not a Netherlands-wide wait. Ask the operator which project affects your connection and whether flexibility or local capacity changes its timing.

Method: primary publications from grid operators, regulators and Berkeley Lab. Figures retain the source's geography, project type and reporting date. Where the reviewed sources do not establish a comparable wait-time average, no numerical range is assigned. Policies and project schedules can change after the review date.

Plan around power you can use

Compare the date you can use an initial amount of power with the date your full load can be served. Ask for the capacity, constraints, dependencies and costs behind each option.

Path	Confirm the timing	Consider the trade-off
Utility connection or upgrade	Request the operator's written schedule, covering studies, permits, equipment, construction and energization.	Clarify which milestones are firm, which are estimates and what capacity is available at each stage.
Phased, flexible or alternative-site connection	Ask about a smaller initial connection, an operating limit or another location with available capacity.	Assess how curtailment, phased growth or a location change affects the operation.
On-site power	Verify equipment availability, fuel supply, permits, installation and any required network agreement.	Evaluate total operating cost, emissions, noise, maintenance and resilience alongside the utility path.