Record German Curtailments in 2026 Sharpen Battery Build Case, Analysts Say
Montel Analytics forecasts 2 TWh of commercial green curtailment this year, a 10% rise from 2025 that is accelerating battery storage investment across Germany.
Germany is on track to curtail a record 2 terawatt-hours of commercial green power in 2026, a 10% rise from 2025, sharpening the investment case for battery storage, according to a Montel Analytics report published on Monday (2026-07-27).6
The projection reflects the pace at which Germany has added generation without adding comparable grid flexibility. Renewables hit a record 58% of the country's electricity consumption in the first half of 2026, up from 55.8% in the same period of 2025, per estimates from industry bodies ZSW and BDEW. Germany installed 8.3 GW of new solar capacity in those six months alongside 2.5 GW of onshore wind, the latter up from 2.2 GW in the first half of 2025.5
Wind has driven much of the oversupply pressure. First-quarter 2026 wind generation surged 27% from the year-earlier period, according to an April analysis by the International Economic Forum for Renewable Energies, benefiting from favorable conditions after a weak first half of 2025. Germany added roughly 5 GW of wind turbines in 2025, and the 2026 build is running ahead of that base.5
The price signal has been visible in spot markets for months. Germany hit EUR -499.99/MWh intraday on May 1 (2026-05-01), Montel reported, and on Sunday May 17 (2026-05-17) Germany, France and Hungary all recorded intraday prices below EUR -400/MWh — the record lows across the region. Those episodes reflect the same surplus dynamic driving curtailment: excess supply meeting inadequate storage or export capacity.2,1
But the broader market is sending a different signal this Monday (2026-07-27). German power front-month fell 5.18% to EUR 125.77/MWh. Batteries earn on price volatility and peak-trough spreads rather than average price levels, yet a persistent decline in average prices raises project financing questions for storage builds that are not yet online. The Montel Analytics curtailment forecast implicitly assumes that dynamic resolves in storage's favor over the medium term.6
Commercial investment is moving ahead regardless. Spain-based Fotowatio Renewable Ventures secured grid access for 2.3 GW of planned renewable energy and battery storage projects across Germany, Power Technology reported in June (2026-06-18). Competition for grid connections has tightened sharply as more developers queue for access. One FRV battery facility with 750 MW of planned capacity is approaching building approval. In Lower Saxony, a 600 MW battery system is in its B-Plan permitting phase. In North Rhine-Westphalia, three projects totaling more than 900 MW of planned capacity await final permits. The wider FRV portfolio also includes a battery project rated at 900 MW/3,600 MWh.3
Germany's official target is 10 GW of new wind capacity annually to reach 80% of electricity from renewables by 2030. At first-half 2026 rates of 2.5 GW of onshore wind installed, the country is undershooting on wind even as solar build runs ahead. More renewable capacity without faster storage deployment means more curtailment, and more curtailment means continued downward pressure on average prices during high-generation periods.5
French nuclear capacity losses add a cross-border dimension. A record heatwave sweeping Europe in late June (2026-06-26) pushed French nuclear output cuts to 12% of total capacity, Montel reported, tightening French supply and raising import demand on German interconnectors. That limits how freely Germany can export its green surplus during high-renewable periods, keeping curtailment levels elevated even when external demand rises.4
The near-term indicator is FRV's 750 MW project approaching building approval. The gap between grid capacity secured and actual construction completion has widened across European markets, and the intensity of competition for German grid access makes that timing risk more acute here. If the permitting pipeline stalls, the 2 TWh curtailment figure could climb again in 2027 with still no new storage capacity to absorb it.3