HELLENiQ ENERGY has inaugurated a robust 200 MWh battery storage system in Thessaloniki, marking a decisive step in Greece’s energy transition with a focus on national grid stability.
Greece has taken a strategic step toward modernizing its energy infrastructure with the commissioning of HELLENiQ ENERGY‘s new battery facility in Thessaloniki. The project, which required an investment of 50 million euros, serves as a cornerstone for balancing the country’s electrical system, especially as it increasingly integrates renewable sources such as solar and wind power.
The facility, which began operations in October 2026, offers a storage capacity of 200 MWh and a power output of 100 MW. With this infrastructure, the company aims to mitigate the waste of energy generated during peak production periods, allowing the surplus to be stored and injected back into the grid during times of high demand, thereby increasing the efficiency of the Greek power sector.
Cutting-edge technology and industrial scale
The complex occupies an area of 100,000 square meters within the company’s industrial site. The structure consists of 56 containers equipped with lithium-iron-phosphate (LFP) technology, a standard recognized for its safety and efficiency. To ensure optimal operational performance, the system features an advanced liquid cooling mechanism, essential for controlling temperatures during intensive charge and discharge cycles.
Integration into the national grid is managed through a new 33/150 kV step-up substation, connected via a five-kilometer underground line. Regarding the project’s strategic importance to the group, company experts highlighted the initiative’s transformative role:
“The new battery park in Thessaloniki not only reinforces the resilience of the power grid but also demonstrates that the transition to clean energy can coexist harmoniously with established industrial hubs, creating a scalable model for the entire Southeast European region.”
Economic impact and future outlook
The development of the project created approximately 100 direct jobs during the construction phase and received financial support from the European NextGenerationEU program, through the national Greece 2.0 plan. The project’s selection by the Greek energy regulator, RAAEY, underscores the work’s relevance to the country’s sustainability goals.
The success of the Thessaloniki unit is already paving the way for the next phase of HELLENiQ Renewables‘ strategy. The company confirmed that a second storage unit is underway in the city of Florina, which will feature 50 MW of power and the same 200 MWh storage capacity. With these moves, the company is cementing its position as a leader in the energy transition, proving that industrial-scale storage is the necessary solution for a decarbonized future.
