Europe faces midday solar glut

Europe’s power problem is no longer just “not enough clean energy.” At lunchtime on sunny days, the problem is the opposite — there is too much of it, all at once. That is what sits behind the latest run of negative electricity prices across European markets. Solar kept getting built, which is good. But the wires, batteries, industrial demand, and market rules needed to soak up that extra noon-time power have not kept pace. (euronews.com) ### Why are prices going negative? In Europe’s wholesale market, prices turn negative when supply is higher than demand and generators would rather pay to stay online than shut down and restart later. Spring makes that more likely — longer daylight lifts solar output, windy weather can (euronews.com)ay, exactly when solar plants are all producing together. (euronews.com) ### Where is this showing up first? The clearest stress is in Iberia, but it is not just an Iberian story anymore. Spain recorded 397 hours of negative prices between January and March 2026, up from 48 in the same period of 2025. Portugal hit 222 hours in that quarter. France’s sub-zero hours nearly doubled this year versus 2025 in Bloomberg’s analysis, and Germany also saw a roughly 50% increase. (euronews.com) ### What made this worse in 2026? Europe entered 2026 after another huge solar year. Ember says wind and solar together generated more electricity than fossil fuels in the EU in 2025, and SolarPower Europe says solar became the EU’s single largest electricity source for the first time i(euronews.com)ter than flexibility is being added. (ember-energy.org) ### Why is solar causing trouble if it is cheap? Because cheap is not the same as controllable. Solar arrives in a narrow time window, then falls away quickly in the evening. Grids can handle a lot of variable generation, but only if something else moves in the opposite direction — batteries charging at noon and discharging late(ember-energy.org)us power. When those tools are missing, the market has one blunt way to clear the excess: crush the price. (entsoe.eu) ### Why not just curtail the solar plants? That happens already, but it is an ugly fix. Curtailment wastes available clean power and hurts project economics. It also creates a weird incentive problem: the system still wants more renewables over the long run, but individual solar plants earn less if they all produce during the same oversuppl(entsoe.eu)e captured price of solar itself. (power.kyos.com) ### So what gets more valuable now? Flexibility. Not in the abstract — very specific assets and behaviors. Batteries can buy power when prices go negative and sell it later. Demand response can move consumption into the cheap hours. Smart charging can turn EV fleets into a daytime sink for excess generation. Even better controls for heat pumps, data centers, and ind(power.kyos.com)hlighting demand response rules as a key tool for operational security. (entsoe.eu) ### Does this mean Europe built too much solar? Basically, no. It means Europe underbuilt the rest of the system around it. The continent still wants more clean electricity to cut fossil fuel use and lower long-run energy costs. But the next phase is less about headline gigawatts and more about timing — when power shows up, where it can go, and who can respond in real time. (ember-energy.org) ### Bottom line? Midday solar glut is not a sign the energy transition failed. It is a sign Europe has reached a harder stage of success. Clean generation is arriving faster than flexibility, so noon-time power is becoming abundant while evening reliability still costs money. The winners from here will not just be the companies (ember-energy.org)id bend instead of break. (entsoe.eu)