Volta Polska’s Połaniec BESS moves closer to operation

Magazyn energii standalone BESS spółki Volta Polska w Połańcu po zakończeniu budowy infrastruktury (październik 2026)

The site infrastructure for Volta Polska’s 6 MW / 15 MWh battery energy storage system in Połaniec is complete. It is the company’s first standalone BESS, and construction began in August 2026. The next steps are delivering and installing the batteries, then commissioning the system.

The system will make the power grid more flexible and help integrate more renewable energy.

Key facts

Location: Połaniec, Świętokrzyskie Voivodeship, Poland
Power and capacity: 6 MW / 15 MWh
Storage duration: 2.5 hours
Type: standalone, grid-connected BESS
Commercial operation (COD): planned for Q1 2027

Next steps

The batteries will now be delivered to the site, with commercial operation planned for Q1 2027.

In parallel, Volta Polska is working with its chosen market integration partner to prepare the system for Poland’s energy markets, so that it can earn revenue from its first day of operation.

Lessons from a first BESS project

The project has shown that developing a battery storage system is significantly more complex than developing a solar PV farm. The challenge is commercial as well as technical: a battery can provide several services and access multiple markets, which need to be combined and optimised over time. Knowing how to operate the system and capture the value of its flexibility matters as much as building it.

The hands-on experience gained in Połaniec builds on Groupe Volta’s 10 years of experience with battery energy storage. Together, they now underpin Volta Polska’s next energy storage projects.

Author

Elżbieta Czarnecka

Senior Project Manager

With over 15 years of experience in the renewable energy sector, oversees permitting processes and project execution, from environmental decisions and spatial planning procedures to liaising with public authorities and construction supervision.