Europe is drowning in cheap solar power by day but still scrambling for expensive fossil fuels by night — exposing a growing paradox at the heart of its energy transition.
A new report from Montel Analytics reveals a record surge in negative electricity prices across the continent in the first half of 2025.
Sweden’s SE2 zone recorded 506 hours below zero, with over 400 hours logged in Spain, Germany and the Netherlands. The driver? A tidal wave of solar generation with nowhere to go.
Total solar output hit 104.4TWh in Q2, flooding grids during daylight. Germany, Spain and France led the charge but the UK also saw a 40% jump compared to Q2 2024.
As supply outstripped demand, prices crashed. Yet as the sun sets, fossil fuels still fire up to meet peak evening demand — triggering a second price spike in the same day.
Montel Director Jean-Paul Harreman summed it up: “Negative power prices are forecast to reach record levels across parts of Europe in Q3. This is being driven by continued renewable capacity expansion without a commensurate increase in underlying demand.”
The result is volatile.
Midday prices collapse but evening ramps remain reliant on gas.
Industrial buyers now face extreme intraday swings, exposing them to both risk and opportunity. Storage and flexibility haven’t kept pace.
Grid constraints are making it worse. Southeastern Europe is struggling to absorb cheap imports due to weak interconnectors.
France’s nuclear outages and low hydro levels are tightening supply margins across the board.
Europe’s renewables are booming but its energy system isn’t ready.
Without urgent investment in flexibility, infrastructure and storage, the price paradox will only deepen.
