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Bulgaria has installed between 40 MWh and 50 MWh battery energy storage capacity to date. However, a new national legislation as well as funds provided through the European Union''s Recovery and Resilience Facility could see the country install another 1 GWh over the next two years.
Sepehr Soltani, lead energy storage analyst at Norwegian consultancy Rystad Energy told the RE-Source Southeast Conference that took place in Sofia, Bulgaria, in May that Bulgaria offers the highest revenue potential for battery storage in Europe.
Specifically, according to data presented by Soltani at the RE-Source Southeast Conference, Bulgaria''s electricity market offers an opportunity for €110 per MWh profit with a battery energy storage system with two hours of discharge capacity using energy arbitrage. Rystad Energy''s analysis has set the battery system costs at a flat €60 per MWh.
Despite this opportunity, the conference argued that until recently energy storage was not a big thing in Bulgaria and this is due to Bulgaria''s plentiful operational coal and nuclear capacities. Nevertheless, the country needs to comply with the European Union (EU) rules for emissions reduction and the phasing out of coal plants is imminent. Given that renewable energies will fill the coal generation gap, the role of energy storage will need to increase too.
"In fact, we are already seeing the transition to energy storage in Bulgaria, mainly through the development of battery storage facilities behind-the-meter," Alexander Rangelov, CEO of the International Power Supply (IPS) Group, an energy storage manufacturer headquartered in Sofia, told pv magazine.
Bulgaria has installed between 40 MWh and 50 MWh of battery capacity to date, with business models mainly based on grid balancing and arbitrage. Rather interestingly, according to Rangelov, some large consumers, such as factories, are also installing behind-the-meter battery energy storage systems even without having a renewable power generation facility on site. "They do so to reduce their electricity costs via self-consumption of the energy stored during times of low electricity prices," he says.
"Previously, battery systems were only used for self-consumption and back-up purposes, we believe that new business opportunities arise now. The legislative update coupled with new financing by the European Union''s Recovery and Resilience Facility mean that about 1000 MWh of new battery capacity is expected to be connected to the grid within the next two years. This capacity will be used for both solar peak shaving and grid balancing," Rangelov said.
Bulgaria''s Ministry of Energy is currently running two tenders aiming to commission 1,425 MW of solar and wind generation capacity coupled with 350 MW of behind-the-meter energy storage. The deadline for submitting project proposals was June 12, 2024 and the ministry accepted bids from companies in all sectors apart from agriculture, forestry, and fishery. So far, the government hasn''t announced plans to tender in front of the meter energy storage capacity.
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About Bulgaria energy storage economics
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