One of Cyprus's first standalone battery energy storage systems (BESS) has received environmental clearance from the Department of Environment, with the project prominently featuring eight medium-voltage transformer units as part of its grid integration plan.

The facility, developed by HESS Hybrid Energy Storage Systems, will have a 59 MW output capacity and provide 120 MWh of energy storage. Located in Psevda, Larnaca District, the project is designed to ease strain on the EU's only non-interconnected electricity grid.

The transformer units will play a critical role in stabilizing voltage levels and linking the BESS to the national 132 kV transmission grid through an on-site substation. The system also includes 259 converters and is expected to connect with the upgraded Psevdas high-voltage substation by 2029.

The Department of Environment waived the need for a full environmental impact study but mandated mitigation steps, including olive tree relocation and groundwater protection. Construction is estimated to last 10 months, with an investment value of €22 million.

As Cyprus faces delays in gas supply and interconnection infrastructure, the use of battery systems with integrated transformer solutions is becoming essential for energy reliability and renewable energy integration.