GSL ENERGY's Battery Energy Storage System (BESS) and Solar Solutions in Bulgaria

In 2024, GSL ENERGY completed a 7.45 MW battery energy storage system (BESS) in Bulgaria, which is used in conjunction with a large-scale solar photovoltaic power plant to provide stable, clean electricity to remote areas. The implementation of this project not only improved the utilization rate of renewable energy in the local area but also alleviated the pressure on Bulgaria's power grid.

I. Why does Bulgaria need energy storage batteries?

In recent years, Bulgaria has faced significant power shortages, particularly during winter peak demand periods and in remote areas, where power supply instability is more pronounced. The primary reasons include:

High reliance on fossil fuels and rising energy import costs;

Increasing renewable energy share but high volatility, such as solar power, is unable to provide stable electricity at night or on cloudy days;

Aging grid infrastructure that struggles to manage peak-to-valley differences and integrate distributed energy sources.

Battery energy storage systems (BESS) are the key technology to address these challenges: storing energy during periods of surplus power and releasing it during peak demand to ensure round-the-clock power supply security for users.

2. Integration of 7.45MWh Energy Storage Batteries with Solar Photovoltaic Systems

In this project, GSL ENERGY adopted an advanced lithium-iron-phosphate (LiFePO4) high-voltage energy storage battery solution, which is used in conjunction with a large-scale solar photovoltaic array to achieve a “daytime power generation and storage, nighttime power discharge and supply” model.

Project Highlights:

Energy Storage Capacity: Total capacity of 7.45MWh, capable of sustaining power supply for several hours

System Type: High-voltage BESS, supporting both grid-connected and off-grid modes

Application Scenarios: Remote rural areas, factories, and agricultural facilities

Advantages: Reduces grid load, enhances energy independence, and lowers electricity costs

The system generates electricity and charges during the day using photovoltaic panels, providing stable power in the evening and at night. Even under adverse weather conditions or grid failures, it ensures the continuous operation of critical loads.

3. Price Trends for Solar Batteries in Bulgaria

According to 2024 market data, the prices of solar batteries and energy storage batteries in Bulgaria are influenced by factors such as cell costs, import tariffs, and installation service fees. The current market reference prices are as follows (using B2B projects as an example):

Solar photovoltaic panels: approximately 0.18–0.25 euros/Wp

Industrial-grade energy storage batteries (lithium iron phosphate): approximately 350–500 euros/kWh

BESS integrated systems (including PCS and EMS): approximately 450–650 euros/kWh

Thanks to GSL ENERGY's factory-direct supply model, we can help customers significantly reduce overall system costs while maintaining high quality.

4. Recommended Energy Storage and Solar Companies in Bulgaria

In Bulgaria, finding an experienced, fully certified energy storage battery company with global case studies is key to ensuring the long-term stable operation of a project.

5. Conclusion

As Bulgaria's energy transition deepens, solar + energy storage systems will become the mainstream power generation model of the future. GSL ENERGY will continue to provide local customers with efficient and reliable energy storage solutions, supporting Bulgaria in achieving its energy independence and carbon emission targets. If you are seeking a Bulgarian energy storage battery company, are interested in learning about Bulgarian BESS battery technology solutions, or wish to obtain detailed quotes for Bulgarian solar battery prices, please feel free to contact our professional team.