PPC and Metlen Partner on Battery storage development of 1.5 GW in Three Countries
In a significant move to bolster energy infrastructure across Southeast Europe, Greek utility PPC Group and Metlen Energy & Metals have announced a major partnership. The two energy giants have formed a 50:50 joint venture to develop, construct, and operate up to 1.5 gigawatts (GW) of battery energy storage systems (BESS) across Italy, Romania, and Bulgaria.
This ambitious collaboration aims to deliver a total storage capacity of 3 gigawatt-hours (GWh), playing a crucial role in stabilizing the regional power grids as they integrate more renewable energy sources.
The Scope of the Partnership’s Battery storage development
The joint venture leverages the distinct strengths of both companies. PPC Group, a state-controlled utility, brings its established market presence and operational footprint in all three target countries. Metlen, formerly known as Mytilineos, contributes its extensive expertise as an engineering, procurement, and construction (EPC) firm with a proven track record in project development and energy management.
The projects will utilize advanced, two-hour liquid-cooled lithium-iron-phosphate (LFP) batteries. This technology is known for its safety, longevity, and cost-effectiveness, making it ideal for grid-scale applications. The partners have set an aggressive timeline, aiming to complete the first 1 GW of storage capacity within the next 12 months. These battery systems will be strategically located to support grid operations and work in tandem with existing and future photovoltaic and wind power plants.
A Deepening Strategic Alliance in Battery storage development
This battery storage initiative builds upon a pre-existing relationship between PPC and Metlen. In 2024, the companies signed an agreement for the development of 2 GW of solar projects across Italy, Romania, Bulgaria, and Croatia, under which Metlen handles construction and PPC acquires the completed assets.
This new venture marks a deeper integration of their efforts. For PPC, the partnership provides a fast track to achieving its three-year energy storage targets through rapid execution. For Metlen, it represents a significant step in strengthening its European energy storage strategy and cementing its position as a key player in the continent’s energy transition.
Powering a Growing Market Through Battery storage development
The timing of this announcement is particularly noteworthy, as it coincides with a surge in BESS activity across the region, especially in Romania. This PPC-Metlen partnership is a leading example of a broader trend, with major announcements also coming from companies like Enery and Mass Group.
The growing investor familiarity with BESS technology, combined with falling battery prices, is creating a fertile ground for large-scale storage projects. These systems are essential for managing the intermittency of renewable sources, ensuring grid stability, and ultimately, accelerating the shift away from fossil fuels. This 1.5 GW initiative is poised to become a cornerstone of a more resilient and sustainable energy future for Southeast Europe.
