More than 2,500 gigawatts of clean energy projects are waiting to be connected to the global grid. That’s more than the total electrical capacity of the European Union. These projects exist. Contracts are signed, panels ordered, turbines ordered. They don’t produce a kilowatt-hour because they aren’t plugged in.
The debate on energy transition is fixating on the wrong variables. We discuss the cost of solar panels, the power of offshore wind turbines, the competitiveness of green hydrogen. These questions matter. But the real bottleneck of the decade is neither technology nor project financing: it’s the cable, the transformer, and the administrative procedure that precedes them. Where thousands of gigawatts are immobilized, solutions exist — they involve intelligent regulation, not cutting-edge engineering.
The Essential Points
- More than 2,500 GW of clean energy projects are stuck in global interconnection queues, exceeding the total electrical capacity of the European Union, according to the IEA (Electricity 2026)
- In the United States, 80% of projects entering the interconnection queue withdraw before being connected, according to the Lawrence Berkeley National Laboratory
- Median interconnection delays have reached four to five years in the United States and Europe, compared to two years in the early 2010s
- Network component costs have risen sharply over five years; the IEA estimates global network investment must increase from $400 to $600 billion per year by 2030
- Near-zero-cost procedural reforms — cluster studies, non-firm connections — can unlock hundreds of gigawatts without waiting for major infrastructure projects
Four to Five Years of Waiting for a Project That May Never Reach the Grid
The median delay between filing an interconnection request and final approval in Spain, the United Kingdom, or the United States has doubled since the early 2010s. It now reaches four to five years according to data compiled by the IEA in its Electricity 2026 report. In Germany, some onshore wind farms are waiting seven years. And that’s not even the worst scenario. The Lawrence Berkeley National Laboratory documents that in the United States, 80% of projects entering the interconnection queue withdraw before being connected. They disappear, not because they’re bad, but because the rules of the game make them economically unviable before a single cable is laid.
This phenomenon is not marginal. It is systemic. The American queue reached approximately 2,600 GW of pending projects by end of 2023 — 2.5 times the country’s installed electrical capacity. The British queue represents several times the existing offshore wind farm. In continental Europe, Spain manages an accumulation of requests that exceeds its own administrative processing capacity. These queues are not healthy stocks: they’re inflated by speculative projects, duplicates, requests filed to reserve a spot without firm intention to build. But even trimming them, the balance of serious blocked projects remains massive.
The problem has simple internal logic. The dominant interconnection study model — the “individual project-by-project study” — processes each request in order of arrival. When the number of requests explodes, as since 2020, the network operator is overwhelmed. Studies accumulate. Each new project modifies the constraints of previous projects. The system paralyzes itself through the very mechanics of its rules, not from lack of good will.
Network Costs Soaring While Solar Panels Divide Their Price by Ten
The cost of a solar panel fell by approximately 90% in ten years. That’s the story everyone tells. The other, less told story, is that of the power transformer: its price increased by 60 to 80% between 2020 and 2024, according to Wood Mackenzie and Power Mag data — some small distribution transformers having experienced even steeper increases, close to doubling. High-voltage submarine cables followed a similar trajectory. Circuit breakers, interconnection substations, reactive power compensation equipment — all the hardware that allows electricity to travel from generation to consumption point — experienced severe inflation from simultaneous global demand, supply chain tensions, and industrial sector concentration.
The IEA estimates global investment in electrical networks at approximately $400 billion per year in 2024. To enable the integration of renewable energy volumes anticipated by 2030, this figure must reach $600 billion. The gap — $200 billion annually — is considerable, but less so than the cumulative investment gap over the past two decades. Networks have been underfunded for years because regulated electricity prices didn’t adequately compensate operators, because political priority went to visible projects — wind turbines and panels — rather than lines and substations, and because the urgency wasn’t yet there.
It is now. Electricity demand is rising again in nearly all advanced economies, driven by data centers, industrial heat, heat pumps, and electric vehicles. The IEA projects that global electricity consumption will increase by more than 4% annually until 2027. An already strained grid must therefore simultaneously absorb more demand and more intermittent generation — and do so with infrastructure designed for another century.
Power transformer manufacturers, essentially European and American (ABB, Siemens Energy, Hitachi Energy), are operating at full capacity. Delivery times for a large-capacity transformer reach two to three years. Even when interconnection is approved, equipment can be lacking.
What Great Britain and Spain Understood That Others Haven’t Yet Done
The good news is that the most effective solutions require neither breakthrough technology nor massive investment. They require intelligent regulation.
The United Kingdom launched a reform of its interconnection queue in 2024 — the “queue reform” — which removed hundreds of gigawatts of speculative or unviable requests to reconstitute a manageable queue. Ofgem, the regulator, introduced stricter seriousness criteria: developers must demonstrate a level of project advancement before entering the queue. The result is counterintuitive: by reducing the queue on paper, the United Kingdom accelerated actual interconnections.
Spain experimented with “cluster studies” — grouped studies. Rather than evaluating each project individually, the network operator Red Eléctrica evaluates a group of neighboring projects simultaneously, identifies necessary reinforcements once, and distributes costs. Administrative efficiency is incomparable to the individual mode. A cluster study can process in one year what the classical system will handle in five.
The United States initiated a similar reform. The Federal Energy Regulatory Commission (FERC) adopted its Order 2023 in 2023, requiring American network operators to switch to cluster studies and tighten filing requirements. First results are expected for 2025 and 2026. The ambition is to reduce median delays by half. This article is far from the only one following this sector transition — similar dynamics in other segments of the green industry show that industrial policy and regulation rarely happen where the spotlight is directed.
Another solution, deployed in Ireland, Finland, and partially in the United Kingdom, is “non-firm” or “flexible” connection. A project connects to the grid but contractually accepts being curtailed during congestion hours. In return, it benefits from nearly immediate interconnection. For a wind or solar farm whose generation is already variable, accepting a few curtailment hours per year in exchange for years less waiting is often economically advantageous. This model frees up grid capacity without laying a single additional cable.
The Actors Moving the Worksite Forward
The International Energy Agency plays a documentation and advocacy role rarely recognized at its true value. By publishing Electricity 2026 with an entire chapter devoted to networks — systematically quantifying global queues and delays by country for the first time — the IEA provided regulators and governments with factual arguments. Ministries hesitating to undertake politically costly procedural reforms now have a shared diagnosis.
The international initiative launched under the French G7 presidency in 2023 — the “Grid Declaration” — brought together network investment commitments and regulatory reform promises from most G7 economies. Results remain uneven, but the political framework is established.
On the private side, companies like Amprion in Germany, National Grid in the United Kingdom, or Elia in Belgium have launched massive investment programs to modernize transmission lines. These network operators, historically low-profile in public debate, have become central actors in decarbonization. Their ability to borrow on markets, at regulated conditions, partly determines the pace of interconnections.
Specialized infrastructure funds — Copenhagen Infrastructure Partners, Macquarie, Brookfield — have identified networks as a high-growth asset class. Regulated, predictable returns over twenty years match their risk profile. This convergence between patient capital and investment need is one of the favorable conditions the sector lacked ten years ago.
The problem is therefore neither available money nor technology. It’s the speed at which network infrastructure projects obtain their permits. In Europe, a transmission line project takes a considerable number of years between decision and operation. This is where intelligent regulation must act, with accelerated procedures for projects of common European interest, as the revised TEN-E Regulation attempted to do in 2022.
The Last-Mile Rule and Energy Transition Inequality
Countries of the Global South face a more acute version of the same problem. In sub-Saharan Africa, Southeast Asia, and parts of Latin America, the distribution network — the “low voltage,” the last mile between the substation and the household — either doesn’t exist or is too degraded to accommodate decentralized production.
This situation creates a profound asymmetry in the global energy transition. Rich countries have networks but lack administrative capacity to process interconnections; poor countries lack the network itself. Solutions differ radically. For the former, procedural reform suffices to unlock hundreds of already-financed gigawatts. For the latter, the network must be built before even asking the interconnection question.
According to the latest data published by the IEA, IRENA, and partners in the Tracking SDG 7 (2025) report, approximately 666 million people still lack access to electricity globally. Achieving universal access by 2030 implies electrifying this population, whose majority must be reached by off-grid or mini-grid solutions — precisely because the conventional grid won’t reach them in time. Companies like Bboxx in Kenya or SunCulture in East Africa deploy solar kits and rural mini-grids that bypass the absence of centralized infrastructure. This is transition by default, not by choice: it works for basic access, but doesn’t support industrialization.
The network fracture is therefore also a development fracture. A country that cannot interconnect its clean energy projects cannot decarbonize its economy, but it also cannot create conditions for competitive industry. Access to clean, abundant, and reliable electricity is a prerequisite for industrial development — something Vietnam understood in its strategy for industrial upgrading, documented here in another perspective.
What the Network Bottleneck Reveals
The cable and pole story teaches several things about the mechanics of progress.
First, spectacular cost gains on one technology — solar panels — can be neutralized by administrative rigidities in another link of the chain. The 90% drop in solar costs has no value if the project waits five years in an interconnection queue and disappears before being connected. Technical progress and institutional progress must advance together.
Next, the reforms that unlock the most value aren’t always those that cost the most. A cluster study costs less than individual studies and processes ten times more projects. A non-firm connection requires no additional cables. Tightening queue entry criteria reduces overall paperwork. These are governance reforms, not investment programs. They’re decided in months, not years.
Finally, the actors moving this worksite forward aren’t inventors or charismatic entrepreneurs. They’re regulators — Ofgem, FERC, the European Commission, Red Eléctrica — making little-noticed but decisive technical decisions. The British queue reform will never make economic newspaper headlines. Yet it will unlock dozens of gigawatts.
The question that remains open is one of speed. Procedural reforms take time to produce effects: agents must be trained, computer systems modified, negotiations with existing developers whose acquired rights complicate transition to new rules. The first regions to undertake the most ambitious reforms — the United Kingdom, certain American states — will see their results in 2026 and 2027. If these results confirm the hypothesis, others will follow. The parallel with other domains of technical regulation is illuminating: the right idea often takes several regulatory cycles to prevail, then prevails rapidly once proof is established.
The real test for the decade is not whether renewable energies can be cheaper than coal. They already are. It’s whether political and administrative systems can reform their procedures fast enough to let this electricity reach the grid.
Sources
- IEA, Electricity 2026, Grids section — https://www.iea.org/reports/electricity-2026/grids
- Lawrence Berkeley National Laboratory, Queued Up: Characteristics of Power Plants Seeking Transmission Interconnection — https://emp.lbl.gov/queues
- Federal Energy Regulatory Commission, Order 2023 — https://www.ferc.gov/explainer-interconnection-final-rule-2023-A
- Bruegel, studies on permitting delays for network infrastructure in Europe — no certified URL (bruegel.org)
- IRENA/IEA, Tracking SDG 7: Energy Progress Report 2025 — https://www.irena.org/News/pressreleases/2025/Jun/Energy-Access-Has-Improved-Yet-International-Financial-Support-Still-Needed-to-Boost-Progress
- Ofgem, Connections Reform — https://www.ofgem.gov.uk/press-release/ofgem-sets-out-major-reform-package-next-step-accelerate-grid-connections
- IEA, Electricity 2025 (executive summary) — https://www.iea.org/reports/electricity-2025/executive-summary
- Wood Mackenzie, Transformer market pricing — https://www.woodmac.com/news/opinion/supply-shortages-and-an-inflexible-market-give-rise-to-high-power-transformer-lead-times/
- IRENA, Renewable Power Generation Costs in 2024 (July 2025) — https://www.irena.org/Publications/2025/Jun/Renewable-Power-Generation-Costs-in-2024
- Ember, Money on the line: scaling electricity interconnection for Europe — https://ember-energy.org/latest-insights/money-on-the-line-scaling-electricity-interconnection-for-europes-energy-future/