Variable renewable energy generation rose across Southeast Europe during Week 26 (22–28 June 2026), though the regional increase did not translate evenly across individual power markets. Total VRE output increased 11.7% week on week to 4.27 TWh. The gain was driven primarily by wind, which climbed 32.4%, adding 457 GWh to the regional supply mix. Solar generation was broadly flat, falling slightly by 0.4%.
Wind recovery lifts regional VRE, solar remains steady
Türkiye contributed the largest share of the regional renewable increase, with wind generation rising sharply. Wind output in Türkiye increased by 43.8%, lifting total variable renewable generation by 36.9% versus the previous week. Greece also saw a strong wind rebound, with wind generation up 57.5%. That improvement more than offset a 5.6% decline in solar output in Greece.
Elsewhere, solar played a larger role in supporting renewables in some markets during the week. Hungary and Bulgaria recorded gains linked to higher solar production, while Romania’s renewable generation remained broadly stable. Despite these country-level differences, overall regional VRE growth did not align with uniform changes in market conditions.
Local declines affect expensive markets
Renewable improvements were not visible across all key markets in Week 26. Croatia recorded a 25.4% decline in variable renewable generation, attributed primarily to weaker wind conditions. Italy also reported lower renewable output, with wind down 10.1% and solar down 5.2%. Both countries were among the region’s most expensive electricity markets during the week.
Croatia averaged €139.09/MWh, while Italy reached €144.67/MWh. The figures indicate that stronger performance at regional level does not necessarily prevent local tightness when generation falls in high-demand areas . For market participants, this points to the importance of understanding where renewable generation is increasing or declining within the same weekly period.
Timing and balancing needs shape wind and solar value
The balance between wind and solar output influenced how renewables mapped onto demand patterns during Week 26. Solar generation provided support during daytime hours but had limited impact on the evening demand peak, when consumption remained high after solar output declined. Wind generation can provide greater contribution during evening and overnight periods, but its variability can increase balancing requirements . This effect is particularly relevant for smaller systems or those with lower interconnection.
Croatia’s Week 26 outcome reflected how weaker wind availability can coincide with tighter market conditions even when other renewable resources improve elsewhere in the region . For traders, utilities and large consumers, country-specific and hourly renewable forecasts are increasingly important as market conditions depend on when and where renewable electricity is available.
Project economics depend on location and dispatch profile
The latest data also highlight considerations for renewable project development beyond installed capacity as a standalone metric of value. Market returns increasingly depend on generation timing, location, grid constraints, balancing requirements and how output correlates with periods of electricity scarcity . A wind project producing during high-demand evening hours may capture different value compared with solar output concentrated around midday periods.
The data further point to hybrid approaches combining renewables with battery storage as a way to add flexibility to generation profiles . In Week 26, renewables continued to play a major role across Southeast European electricity markets, while the operational challenge shifted toward ensuring availability at the right time and in the right locations to reduce system stress and replace conventional flexibility.
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