China's Sermatec to supply batteries for one of Bulgaria's largest storage systems

Chinese company Shanghai Sermatec Energy Technology Co. will supply batteries for one of the largest energy storage systems in Bulgaria. The company announced that the project, with a planned capacity of over 430 MWh, will be operational in August 2025, with connection to the power grid and commercial operation expected by March 2026.

The announcement does not provide details on the location of the project or which solar power plant it will be added to, but it emphasizes that the deal marks “a significant breakthrough for the Chinese battery system supplier in the European market” and fits into Sermatec's broader strategy of expansion in the region. The company will provide an integrated energy storage solution, from equipment supply to long-term maintenance and optimization.

Sermatec will support Bulgaria in building a safer, more stable, and more sustainable energy system," said the company, which emphasized that the country is at a key moment of growth in the renewable energy sector.

Energy storage plays a critical role in integrating new photovoltaic capacity into the national grid. Bulgaria is already seeing a significant increase in photovoltaic installations thanks to favorable climatic conditions, European funding, and increased market interest. This creates a need for additional flexibility and stability, especially during peak periods.

The project provides for load arbitrage management – the system will be charged during off-peak hours (when electricity is cheaper) and will release energy during peak hours when prices are high. Such a strategy allows not only for optimal use of resources, but also for a better return on investment.

The installed system is expected to provide long-term efficiency and stability, as well as contribute to the sustainability of the Bulgarian and regional electricity grid.

Translated with DeepL.