PPC and Metlen Launch 1.5 GW Battery Storage Venture in Southeast Europe

Public Power Corporation (PPC) and Metlen Energy and Metals have signed a joint venture agreement to develop, construct, and operate up to 1,500 MW / 3,000 MWh of battery energy storage system (BESS) projects across Bulgaria, Romania, and Italy, strengthening energy storage capacity in Southeast Europe.

Under the agreement, both companies will hold equal 50% stakes in the newly established joint venture, which will focus on deploying two-hour duration, liquid-cooled lithium iron phosphate (LFP) battery systems. The partners aim to roll out approximately 1,000 MW of storage capacity within the next 12 months, according to a statement from Metlen.

The BESS facilities will primarily be located close to solar and wind power plants, enabling the storage of surplus renewable electricity and its release into the grid during periods of higher demand. The initiative is expected to improve grid flexibility while supporting the integration of increasing volumes of renewable energy across the region.

Konstantinos Mavros, Deputy CEO for Renewables at PPC Group, said the partnership will enhance the company’s strong presence in Southeast Europe while ensuring more efficient utilisation of renewable energy generation. He added that the planned storage projects will contribute to improving electricity system stability both nationally and across the broader European grid.

Metlen Energy and Metals operates across energy trading, supply, renewable development, and storage projects in Southeast Europe. PPC Group currently operates in multiple regional markets with 12.5 GW of total capacity, including 6.4 GW of renewable energy assets, serving around 8.6 million customers.