Energy storage sector in Greece: rapidly increased investor demand for pumped hydropower storage (PHS) project permits
- HYDROMINE Team
- Jun 29, 2025
- 1 min read
Energy storage sector has gained massive popularity over the past years in Greece. In particular, the investment interest in pumped hydropower storage has been bolstered, resulting in 95 pumped hydro storage projects that have acquired electricity storage permit from the Regulatory Authority for Energy, Waste and Water-RAAEY (until October 2025), with an output power that ranges from 7 to 685 MW, a total output power of about 15 GW and a total installed capacity of 145 GWh. Out of them, 29 projects (which is 56% of all projects ≤100 MW) are small size pumped hydroelectric storage units up to 10MW and several of them may have the potential to adapt to the HYDROMINE objectives and proposed technology for small scale PHS units.
Additionally, 3 new projects are on their way to implementation in former open pit lignite mines in Notio Pedio (Kozani), Kardia (Kozani) and Megalopoli (Tripoli). They count a total output power of 714MW, accompanied by other RES projects in the broader region, contributing significantly to the environmental utilization of the post mined areas.
To conclude with, the total capacity of pumped storage systems is expected to be close to 1,9 GW by 2030 and to increase significantly to 5,4 GW by 2050. The total capacity of these systems is expected to be in the order of 17 GWh in 2030 and 67 GWh in 2050, boosting their share in the country’s energy mix.
