Grid connection — Europe
A solar project that is ready to build must first be connected to the grid — and that has become Europe's main bottleneck. Hundreds of gigawatts of projects sit in connection queues (grid queues) that can last years. This page measures, by country, the capacity stuck waiting, the delays, and what the EU plans to do about it.
Last updated: June 2026 · data snapshot 2024-2025
Connection: bottleneck #1
Before producing, a plant must obtain grid access: a permit and reserved transport capacity from the grid operator (TSO for transmission, DSO for distribution). When requests exceed available capacity, projects pile up in a queue (grid queue).
The timeline mismatch: building a line or substation takes 5 to 15 years (permitting + works), while a solar farm is built in 1 to 5 years. The grid cannot keep pace with renewables → queues and curtailment (see curtailment).
Why it matters: a delayed connection means a project earns no revenue for years — a major bankability and schedule risk, sometimes more decisive than cost itself.
⚠ Reading note: the figures below mostly measure queue capacity (GW), all technologies combined (solar + wind + storage). A standardised "average connection time in months by country and size" is not consistently published in Europe — see "Known limitations".
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1. Observed data — grid connection queues by country
Observed dataProject capacity (in GW) awaiting grid connection, 2024-2025, from grid operators and sector studies. Technologies are usually mixed (solar + wind + storage) and definitions differ by country.
⚠ Heterogeneous indicators: NESO "queue" (UK) ≠ "connection agreement but not online" (Italy) ≠ "grid capacity reserved" (Spain) ≠ "connection request pending" (Germany). Do not add up or compare rows directly.
| Country | Capacity in queue | Nature / context | Source |
|---|---|---|---|
| United Kingdom | > 700 GW | NESO queue late 2025 (×10 in 5 years); some projects told ~10-year wait | NESO via ESS-News |
| Italy | 231 GW | Connection agreement secured but not online (169% of installed capacity) | Euronews 2026 |
| Spain | ~200 GW | 99% of available grid capacity already reserved; access via tenders | REE via Euronews |
| Germany | ~140 GW | Renewables awaiting connection (+ ~130 GW storage) — distribution grid | BFF via Clean Energy Wire |
| Denmark | ~60 GW | Energinet halted new large-load connections | Energinet via MLQ |
| Poland | ~51 GW | Most acute case in Central Europe | CEEnergyNews / BFF |
| Czechia | ~26-27 GW | Central Europe | CEEnergyNews / BFF |
| Bulgaria | ~10-15 GW | Central/Eastern Europe | CEEnergyNews / BFF |
UK: the NESO queue includes storage and hybrids, hence the very high total. Spain/Italy: "capacity" reflects requests/agreements, not necessarily viable projects (queues are often inflated by speculative projects).
2. Context — European framing, delays & EU Grid Action Plan
ContextOrder of magnitude at European scale, the grid timeline, and the EU's regulatory response.
| Indicator | Value | Source |
|---|---|---|
| Renewable/hybrid in connection queues in Europe (16 countries) | ~1,700 GW | Beyond Fossil Fuels |
| Value of blocked projects | ~€100bn | Euronews 2026 |
| Wind alone in queues (EU) | > 500 GW | ACER (late 2024) |
| Time to build grid infrastructure | 5 to 15 years | IEA via Clean Energy Wire |
| Transmission line in Europe (>50% on permitting) | up to 10 years | Clean Energy Wire |
| EU Grid Action Plan (28 Nov 2023) — grid investment needed by 2030 | €584bn | European Commission |
The timeline mismatch (grid 5-15 years vs solar 1-5 years) is the structural cause of queues and curtailment. The EU Grid Action Plan aims to speed up permitting, anticipatory planning and non-wire solutions.
Methodology & sources
The main indicator is project capacity (GW) in connection queues, 2024-2025, from grid operators (NESO, REE, Energinet…), the regulator (ACER), the European Commission, and the Beyond Fossil Fuels report (16 countries). Queues usually mix solar + wind + storage; solar alone is rarely isolated. Definitions vary ("queue", "connection agreement", "reserved capacity", "pending request"), so country totals are not comparable.
Sources: ACER · European Commission — EU Grid Action Plan · Beyond Fossil Fuels via Clean Energy Wire · Euronews · NESO via ESS-News · Ember · Eurelectric.
Known limitations: (1) No homogeneous "average wait in months" — Europe does not publish a standardised per-country, per-size connection time; the figures here are queue capacity (GW), not durations. (2) Queues are often inflated by speculative projects that will never be built, so they overstate real demand. (3) Indicators are not comparable — each country defines its "queue" differently. (4) Solar is not isolated — queues mix solar, wind and storage. (5) Mixed sources — institutional (ACER, European Commission) and media/NGO (Euronews, BFF); country figures move fast (2024-2025). Values do not constitute investment advice.