When completed, this project will join the growing cluster of BESS developments in the region, helping to strengthen Bulgarian energy resilience and accelerate the shift to renewable power

/SOFIA, July 14, 2025, 10:00 CET, Inea Consulting Ltd./

Inea Consulting Ltd. is engaged in the technical design and financial modelling for a 100MW/400MWh standalone battery energy storage system (BESS) project in Bulgaria. The design will be elaborated by a team of highly reputable licensed engineers and will include two main parts:

• Part 1 - Battery Energy Storage System (BESS) Plant, including BESS containers, PCS, LV/MV transformers, etc.;
• Part 2 – Grid Interconnection Facilities, including the MV/HV substation and power lines.

The technical design is expected to be ready by the end of August 2025. After that, the project owner will go ahead with the necessary procedures for obtaining the building permit, which is expected to be completed by the end of Q4 2025. The structure of the technical design allows the BESS equipment to be changed, if necessary, within a minimal timeframe.

The financial model will cover the key parameters affecting the economic viability and profitability of the BESS project, as:

• CAPEX and OPEX structuring;
• Cash flow model (unlevered and levered) under different income scenarios;
• Gross and net profit calculation;
• Loan repayment;
• IRR;
• Benefit/Cost (B/C) Ratio;
• Risk analysis.

Earlier this year, Inea Consulting Ltd., a leading provider of renewable energy advisory services in Europe, announced that the sale mandate had been signed between the company and the owners of this 100MWac/400 MWh standalone battery energy storage system (BESS) project, with a design visa and preliminary grid connection contract with the TSO. According to the terms of the agreement, Inea Consulting Ltd. has the right to present this battery energy storage system (BESS) project, which is in the mid-development stage, to qualified investors/buyers, and negotiate the main parameters of any subsequent transactions. The project company owns the land for building a battery energy storage facility with all relevant permits up to the preliminary grid connection contract with the TSO and a technical design. 

If investors are interested in acquiring this project, it is possible to receive a detailed presentation of this 100MWac/400 MWh (BESS) project after signing a Non-Disclosure Agreement (NDA) and/or sending a Letter of Intent (LOI) to our contact address.

The project will be connected to the high-voltage grid with OHL to the TSO substation (20kV/33kV/110 kV) close to the terrain border (less than 100 meters) through its own substation (20kV/33kV/110 kV), which will be built on the project’s terrain. 

“The 100MW/400MWh standalone battery energy storage system (BESS) project will enhance the resilience of the electricity network by generating electricity and providing additional technical services to Bulgaria's transmission system operator, ESO EAD. Once operational, the project will provide vital flexibility to the grid by storing excess renewable energy for use during periods of peak demand. This cutting-edge initiative represents a crucial step toward a sustainable energy future. Additionally, the project is expected to generate direct employment during both the construction and operation phases, as well as indirect job creation in the supply chain and other related services. It’s encouraging to see projects like this being developed at such a rapid pace", commented Mr. Ilko Iliev, CEO of Inea Consulting.

Inea Consulting Ltd. is a well-established Renewable Energy Advisory firm headquartered in Varna, Bulgaria, with a network in Austria, Germany, the UK, Italy, France, the Netherlands, North America, Dubai and other countries. The Company's mission is to render prime investment and engineering advisory services to regionally and internationally operating Clients in the fields of cleantech investments, mergers and acquisitions, business development and project finance. We focus particularly on the emerging markets in Central and Eastern Europe, South-Eastern Europe, CIS countries, MENA countries and LATAM countries.

Inea Consulting Ltd. is a corporate member of SolarPower Europe. Amongst our clients are top-tier companies such as Alpiq, Astronergy, Asian Development Bank, Bain and Company, Citadel, Fortum, RWE, Hyundai Heavy Industries, EDF, ENGIE, Eurus Energy Europe, Orano, Toshiba Corporation, COWI, Mitsubishi, ProCredit Bank Group, Hanwha Q-Cells, CEZ, Sharp, SMA, Statkraft, Volkswagen Group, and many others.

The Bulgarian solar power market has been experiencing significant growth since 2021. As a result of the high economic growth in the last 3 years, industrialisation and urbanisation, the demand for new energy generation sources to replace the coal-based power plants in Bulgaria is increasing. By the end of 2024, Bulgaria had a cumulative installed solar capacity of 4,568 MW (4.57 GW), representing an increase of 1,283 MW (1.28 GW) compared to 2023. For the first half of 2025, almost 450 MW (0.45 GW) of new solar power capacity has been installed in the country, and the cumulative capacity currently is close to 5,000 MW (5 GW), according to the Bulgaria Solar Photovoltaic (PV) Power Market Outlook 2025÷2034.

In 2023, for the first time, Bulgaria joined the group of European countries that installed more than 1 GW of new capacity in a single year. Several large-scale solar photovoltaic (PV) projects with a power capacity above 100 MW were launched into commercial operation in Bulgaria between 2021 and 2024. The utility-scale sector dominates the installed solar capacity, with a share of 77%.

The battery energy storage system (BESS) market in Bulgaria will experience robust growth by 2030 in the co-located/behind-the-meter (BTM) and front-of-the-meter (FTM) segments. Together with the already approved at the end of April 2025, 82 projects for the construction of batteries for the storage of electricity under the Recovery and Sustainability Plan for nearly BGN 1.2 billion (€ 600 million), awaiting the signing of contracts, and 30 reserve projects for which additional money is still being sought through the new chapter of the plan – RePowerEU, Bulgaria intends to become a balancing force in the region.

By the end of 2027, Bulgaria is expected to install between 7 GWh and 11 GWh of new battery energy storage systems, according to the Central East and South East Europe Battery Energy Storage System (BESS) Market Outlook 2025 ÷ 2034.

Email us at our contact address for more information about this promising battery energy storage system project.