BESS

Battery energy storage systems (BESS)

Integration with RES, grid balancing and optimisation of energy costs.

Energy storage – a key element of the energy transition

Battery energy storage systems (BESS – Battery Energy Storage Systems) play an increasingly important role in the modern energy sector. They make it possible to store the electricity produced and to use it at the moments when it is needed most.

Combined with renewable energy sources such as photovoltaic and wind power plants, BESS help to use the energy produced more efficiently by reducing dependence on current weather conditions and improving the predictability of production.

Benefits of energy storage systems

  • More efficient use of energy from renewable sources;
  • Reduction of peak consumption and optimization of energy costs;
  • Greater flexibility and reliability of the electricity system;
  • The possibility to participate in the market for balancing and ancillary services;
  • Improved energy independence of businesses.

As the energy market develops and the share of renewable sources grows, energy storage systems are becoming a strategic investment for businesses and an important factor in the sustainable development of the electricity system.

≈5000
MWh capacity in BG (2025)
≈15000
MWh expected (2026)

How does BESS work?

Charging

During high RES production and low market prices, excess electricity is directed to the batteries. The converter (PCS) converts AC to DC for charging.

Storage

Lithium iron phosphate (LiFePO₄) batteries store energy safely and efficiently. Intelligent management software (BMS) monitors the state of each cell in real time.

Discharging

During peak consumption or high market prices, the stored energy is converted back to AC and fed into the grid. Two-hour storage cycles cover the peak hours.

Grid balancing

BESS systems provide fast balancing services — reacting in milliseconds to frequency deviations. The ideal tool for grid stabilization with a high RES share.

Why BESS with Balkan Logic?

Balkan Logic has its own Energy Management System (EMS), developed for intelligent management of battery systems and real-time optimisation of energy assets. Through continuous monitoring and analysis of market opportunities, our team actively manages charge and discharge cycles, seeking the best economic outcome for the client.

Our approach includes:

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