Market RadarBESS & Batterijparken
Metlen and Karatzis Inaugurate Greece's Largest Battery Park with Jinko ESS
Metlen and Karatzis Group have inaugurated Greece's largest standalone battery energy storage system in Larissa, Thessaly. This 330 MW / 790 MWh facility, supplied by Jinko ESS, marks a significant step for energy security. The Greek Prime Minister underscored the critical role of energy storage for renewable energy integration.
A large-scale 330 MW / 790 MWh battery energy storage system (BESS) has been officially inaugurated in Larissa, Thessaly, Greece. This project, a collaboration between Greek industrial and energy company Metlen and Greek industrial conglomerate Karatzis Group, was opened on October 14. Greek Prime Minister Kyriakos Mitsotakis and Minister of Environment and Energy Stavros Papastavrou were present at the inauguration, joined by various local and national officials.
A joint investment vehicle facilitated the project's development, with Karatzis Group securing a 51% share and Metlen holding the remaining 49%. Metlen took charge of the facility's construction, operation, and maintenance, drawing on its expertise from international energy storage projects. The partners describe the system as the country’s largest standalone battery storage project.
The battery storage technology for this project was supplied by the Chinese manufacturer Jinko ESS, featuring their SunTera G2 ESS system. While Jinko had previously published a 395 MW / 790 MWh system, the maximum active power injection at the local high-voltage substation is capped at 330 MW due to a grid connection agreement with the Greek transmission system operator (ADMIE/IPTO). This overbuild allows for an approximate 1.2x DC-to-AC ratio.
Evangelos Mytilineos, Metlen's executive chairman, conveyed his pride regarding the opening of 'Greece’s largest standalone energy storage facility in Eastern Europe and one of the largest across the European Union'. Prime Minister Mitsotakis emphasized that energy storage will play a critical role in enabling greater use of renewable energy. He also highlighted the government's ambition to have 3-4 GW of storage projects operating or under development by 2028.
Metlen is also actively involved in other ventures; in August 2026, the company signed a balance-of-plant contract for the 129 MW / 362 MWh Penn BESS in the United Kingdom. Last month, Metlen agreed to sell the Tamarico II hybrid solar and battery project in Chile, which includes 165 MW of solar PV and 725 MWh of battery storage, with potential for expansion to 925 MWh.
Source: ESS News
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