Greece strengthened its position as one of Southeast Europe’s more competitive electricity markets in Week 42, combining higher renewable output and increased gas-fired generation with a sharp rise in electricity exports. Despite a weekly increase in wholesale prices, the country maintained a substantial price advantage over several northern Balkan markets.
Greek day-ahead electricity prices averaged €186.57/MWh, up 6.7% from the previous week but remaining well below levels in Serbia, Hungary, Romania, Bulgaria and Croatia. The price gap with Bulgaria widened to €49.32/MWh, while the differential with Hungary reached €60.30/MWh, creating favourable conditions for cross-border electricity trade.
The price advantage was supported by stronger renewable generation. Combined wind and solar output increased by 11.9% to 640.88 GWh. Wind generation surged by 83.5%, more than offsetting a 16.9% decline in solar production and strengthening the contribution of renewable electricity to the Greek power mix.
Thermal generation also recorded a significant increase. Greek thermal output rose by 26.14% to 437.23 GWh, primarily driven by a 26.56% increase in gas-fired generation. The simultaneous growth of renewable and thermal production expanded the electricity available to meet domestic demand and support exports to neighbouring markets.
Hydropower was the main source of weakness in the generation mix, declining by 33.97% to 30.22 GWh. However, the reduction was insufficient to offset stronger wind and thermal output, allowing Greece to increase electricity exports substantially during the week.
The impact was particularly visible in cross-border trade. Greek net electricity exports surged by 143.88% to 198.49 GWh, reinforcing the country’s role as a regional supplier at a time when several northern Balkan markets were experiencing higher prices and tighter supply-demand balances.
The development highlights the commercial importance of Greece’s expanding renewable generation fleet, gas infrastructure and cross-border interconnections. Week 42 demonstrated how these assets can complement one another when weather conditions favour renewable production and neighbouring markets offer attractive export opportunities.
Strong wind generation helped increase the availability of electricity with relatively low short-run generation costs, while gas-fired plants provided additional dispatchable output. Together, these sources enabled Greece to meet domestic electricity requirements while directing more power towards higher-priced neighbouring markets.
The increase in gas-fired generation also illustrates the continuing role of flexible thermal capacity in a power system with growing renewable penetration. Although gas prices were exceptionally high during the week, Greek gas-fired output still increased considerably, suggesting that electricity-market conditions and export opportunities supported additional generation despite elevated fuel costs.
For regional traders and utilities, this strengthens Greece’s potential role as a southern electricity supply hub, connecting renewable generation, gas-fired capacity and electricity demand across the Balkans. The country’s ability to export surplus production can influence regional price formation and the direction of cross-border flows, particularly when neighbouring markets face tighter conditions.
For investors, however, the implications extend beyond generation volumes. A market with substantial renewable capacity can experience periods of lower wholesale prices and merchant-price compression, reducing revenues for generators during hours of abundant production. Strong interconnection can help mitigate this exposure by allowing surplus electricity to reach markets where prices are higher.
Transmission capacity is therefore becoming an increasingly important component of Greece’s electricity investment outlook. The ability to move electricity across borders can improve the commercial value of renewable generation, although actual returns depend on available capacity, congestion, market spreads and the timing of production.
Battery storage could further strengthen this model by absorbing electricity during lower-priced periods and discharging when demand rises or regional prices increase. By shifting renewable production towards more valuable hours, storage may improve revenue capture and help manage volatility in both domestic and neighbouring markets.
Week 42 does not establish a permanent price advantage for Greece. Weather conditions, plant outages, fuel costs and transmission constraints can quickly change generation economics and cross-border trading patterns. Nevertheless, the week’s results demonstrated how stronger wind output, increased gas-fired generation and expanding export volumes can combine to influence the wider regional electricity market.
As renewable capacity grows across Southeast Europe, Greece could become increasingly influential in determining regional electricity flows. Its ability to combine variable renewable generation, flexible thermal capacity and cross-border connectivity will be central to how effectively it converts surplus production into commercial value.
