Solar buildout in South-East Europe starts to undercut its own economics

South-East Europe’s fast-growing solar fleet is beginning to erode the economic value of its own expansion. With more generation landing during periods of weak demand, market prices—especially around midday—are being compressed, reducing the revenues solar producers can actually secure.

Midday price pressure grows as demand softens

Recent figures show solar peak generation reaching 8,198 MW, among the highest levels recorded this year. Over the same period, regional electricity demand has fallen to 28,863 MW, the lowest level since early autumn. The combination of higher solar output and weaker demand is changing how prices form through the day.

The “cannibalisation” effect shows up in negative pricing

Market dynamics are increasingly producing a cannibalisation effect: additional solar generation pushes prices down, lowering realised revenues for solar producers. In several markets—including Hungary and Romania—negative pricing events are becoming more frequent, with clusters of hours clearing at or below zero.

Capture prices diverge from baseload averages

This shift is also visible in how solar capture prices compare with baseload averages. Forward projections indicate that solar capture prices in SEE could fall to a 10–25% discount versus baseload by 2027, particularly in markets with high installed capacity and limited storage.

Intraday curves widen the gap between solar output and higher-value hours

Intraday price curves are reflecting a widening spread between low-price midday periods and higher evening prices. Midday hours are increasingly associated with price compression, while evening prices remain elevated due to reliance on imports and dispatchable generation. Because solar output is concentrated during low-price windows, the price shape itself is not translating into better outcomes for producers.

Developers respond with storage hybrids and more hedged contracting

Developers are adjusting both project design and commercial terms. Hybridisation with battery storage is becoming a standard feature of new solar projects, enabling operators to shift generation into higher-priced periods. At the same time, long-term power purchase agreements (PPAs) with fixed or floor pricing are gaining importance as a hedge against market volatility.

Where the impact is strongest—and where it may spread next

The cannibalisation effect appears most pronounced in Hungary and Romania, where solar deployment has accelerated quickly. Bulgaria and Greece are following similar trajectories, while Serbia remains at an earlier stage of penetration but is expected to face comparable dynamics as capacity expands.

Overall, solar power in South-East Europe is moving from a volume-driven model toward one where timing, storage capability, and market exposure matter more for profitability than installed capacity alone.