Ember warns half of Europe's planned renewables face stranding on grid bottlenecks

Ember warns half of Europe's planned renewables face stranding on grid bottlenecks A think tank says more than 120 GW of planned wind and solar could be stalled by grid constraints, undercutting the case that Europe's permitting fixes will translate into power. More than 120 GW of planned wind and solar projects across 20 European countries are at risk of being stranded because the grid cannot absorb them, the think tank Ember said on Wednesday (2026-05-20). That is half the roughly 240 GW of renewables additions Europe expects to build by the end of the decade.¹ That matters because the bottleneck has moved. For years the binding constraint on European renewables was permitting and paperwork, the bureaucratic drag that Brussels has spent the past two years trying to cut. Ember's data point to a different problem. Even where projects clear approval, connection queues, substation capacity and transmission lines decide whether the megawatts ever reach a market.¹ The economics of that gap are already visible in prices. Europe's power purchase agreement market signed deals covering 15 GW in 2025, about 20% fewer than the year before, Pexapark's chief operating officer Luca Pedretti told Montel's Plugged In podcast released on 2026-05-21. He described a market "inundated with renewables" that has suppressed capture rates and driven a surge in negative prices.² When generation arrives faster than the grid or demand can take it, the value of each new megawatt falls. That is the mechanism behind the lower capture rates Pedretti flagged, and it explains why developers are pulling back even as installation targets stay in place.² Spain is the clearest test case. Wind and solar now supply more than 40% of the country's electricity, a transformation built in roughly a decade in a country with almost no oil or gas of its own. The Bank of Spain estimated wholesale power was 40% cheaper in 2024 than it would have been had the 2019 generation mix held.³ But cheap power on average is not the same as firm power on demand. The Economist's account of Spain's build-out carries a blunt subtitle: more batteries are needed. Without storage to shift midday solar into evening peaks, the country's renewables glut shows up as negative prices and curtailment rather than displaced gas.³ Analysts make the same point at a continental scale. "Dozens of GW" of additional battery storage are needed to curb Europe's growing negative price trend, analysts told Montel in the week of 2026-05-11, as renewables deployment outpaces demand growth. The phrase is deliberately imprecise, and that imprecision is the warning: nobody is certain how much storage closes the gap.⁵ Storage is now where the money is moving. Battery-linked deals are the fastest-growing segment of Europe's PPA rebound, experts told Montel, a sign that contract structures are adapting to a market where shape matters more than raw volume.² There is a demand-side hole as well. Europe remains "very far" from its electrification goals, utility executives told Montel on 2026-04-22, warning that clean power must become central to the energy system to strengthen security. If electrification lags, the new renewables have nowhere to go even when the wires exist.⁶ For gas, the read-through is slower than the headlines suggest. ICE Endex TTF front-month traded around €48.83 on Friday (2026-06-05), and the case for renewables eroding gas-fired demand assumes the new capacity actually generates into the grid. Stranded gigawatts displace nothing. Each year of grid delay is another year European gas burn holds up better than the build-out implies.¹ The Economist framed the broader mood as the humbling of green Europe, a continent whose climate ambitions peaked when growth, inflation and geopolitics were all benign. None of those conditions hold now, and the renewables that were supposed to deliver cheap, secure power are colliding with physical limits that permitting reform does not touch.⁴ The number to watch is connection, not capacity. Headline build targets will keep being announced. Whether Ember's stranded 120 GW shrinks depends on transmission investment and storage roll-out moving at the pace of the turbines and panels already queued behind them. So far the grid is losing that race.^1,5