The Renewable Energy Sources (RES), that IPTO has been systematically connecting to the power grid over the recent years ensure the reduction of wholesale electricity costs. With the rapid integration of new clean energy units and the construction of modern energy infrastructure across the country, the Operator is playing a catalytic role in creating a power generation mix that is “greener” and more resilient to price fluctuations.
In 2025, the increased share of RES, which set a new annual production record at nearly 26.2 TWh, contributed significantly to lower average prices in the Day-Ahead Market, even in months with particularly high demand, such as August and December. This trend is also observed in 2026, with Greece recording particularly low wholesale prices compared to other European countries during the first ten days of March.
The country’s resilience to high wholesale electricity costs compared to other countries in Southeast Europe is reaffirmed by the containment of Day-Ahead Market prices despite international developments and the significant increase in fuel prices.
From 2019 to the present, the expansion of grid capacity through the Operator’s projects in mainland and island Greece has enabled a significant increase in installed renewable energy capacity. Due to their virtually zero variable production costs, renewable sources are increasingly displacing fossil fuel plants from the energy mix, often driving prices to very low levels during peak production hours. At the same time, the increasing penetration of RES into the electricity system reduces the country’s dependence on imported fossil fuels, whose prices and availability fluctuate significantly depending on international developments, thereby strengthening its energy independence and economic sustainability.
IPTO’s investment plan also provides for the upgrading of Greece’s interconnectivity with neighboring countries and the wider region. International interconnections enhance market efficiency by allowing energy to flow from regions with a surplus and lower energy prices to regions with a deficit and higher prices. To maximize the benefits offered by RES and international interconnections, storage technologies are particularly important. Accelerating the development of storage will safeguard Greece’s export prospects and enable greater utilization of RES, thereby limiting price spikes and the overall cost of electricity supply for consumers.
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