The electricity markets in Southeast Europe (SEE) are experiencing significant changes as solar energy production expands rapidly, influencing price dynamics and trading behaviors. Recent developments indicate that intraday spreads have widened considerably, particularly noted during calendar week 13, with typical ranges between €20–40/MWh and occasional spikes reaching €50–90/MWh. This volatility highlights a growing disparity between forecasted and actual electricity generation, especially in regions with increasing solar capacity.
The variability of solar energy output plays a crucial role in this phenomenon. Although seasonal patterns can be anticipated, short-term weather fluctuations such as cloud cover can lead to discrepancies between day-ahead forecasts and real-time production. These discrepancies necessitate adjustments through intraday trading to maintain balance within the market.
This imbalance is particularly pronounced during midday hours when robust solar generation can significantly lower prices, occasionally dropping below day-ahead forecasts. Conversely, as solar generation diminishes in the late afternoon and evening, prices surge due to the need for dispatching higher-cost generation sources, primarily gas-fired plants.
The resultant pricing structure—characterized by low midday rates and heightened evening peaks—is increasingly evident in SEE markets. While similar trends have been observed in Western European markets like Germany and Spain, their emergence in SEE underscores the region’s ongoing energy transition.
However, unlike their Western counterparts, SEE markets face challenges regarding system flexibility. Limited battery storage options, inadequate interconnections, and a continued reliance on thermal generation contribute to a scenario where imbalances translate into heightened price volatility rather than being mitigated by system absorption capabilities.
This evolving market landscape presents attractive opportunities for traders. The intraday market is becoming a primary venue for value creation as participants shift focus toward short-term strategies instead of long-term directional bets. Mastery over renewable output forecasting and system imbalance anticipation is increasingly vital for competitive advantage.
The widening of intraday spreads also influences asset valuation significantly. Flexible assets such as battery storage systems, fast-ramping gas plants, and demand response mechanisms are well-positioned to capitalize on these spreads, thereby enhancing their revenue potential.
Moreover, the growing significance of intraday markets demands improved liquidity and market design across the region. While progress has been made in establishing intraday trading platforms within SEE exchanges, liquidity levels remain inconsistent throughout the area, with larger markets like Hungary and Romania setting the pace.
Looking forward, the trend of expanding intraday spreads is anticipated to persist. As solar capacity continues to grow and wind generation remains variable, the gap between forecasted supply and actual output is likely to widen further, solidifying the critical role of intraday trading in managing these dynamics.
