May 26, 2025
by in News

Battery storage market in SEE emerging, Western Balkans lagging behind with positive prospects

The deployment of battery energy storage systems (BESS) across Southeast Europe is progressing at an uneven pace. State subsidies and financing mechanisms have enabled the rapid implementation of BESS solutions in Greece, Romania and Bulgaria, while markets in the Western Balkans are lagging behind. However, the outlook remains positive, as experiences from neighboring markets and best practices from other parts of the European Union can help overcome initial challenges and streamline the deployment process. This was highlighted by participants of the panel dedicated to BESS at the Belgrade Energy Forum.

Among the technologies required for the energy transition, battery energy storage systems (BESS) stand out as a key factor for integrating electricity from intermittent renewable sources – wind and solar power – into the grid. There are few such facilities in Southeastern Europe and the segment is yet to even be fully regulated in the narrower Western Balkans region. The panelists at a session called Energy storage system market in SEE: trends and forecasts, at Belgrade Energy Forum (BEF 2025), outlined the trends in the budding market.

There are more and more cases of low and negative hourly prices in the wholesale electricity market in the region, providing a clear business case for BESS investments. In addition, the grid is often overloaded on weekends and holidays when solar and wind power production is high, given the weak demand.

Managing Director of Go2Power Consulting Goran Vukojević, who moderated the discussion, warned that negative prices may jeopardize system stability as well, if operators of power plants disconnect them from the grid at the same time, to avoid costs.

He highlighted the preparations in Serbia’s transmission system operator Elektromreža Srbije (EMS) for auctions for ancillary services and praised the company for transparency in regulating the competitive process. The other option for battery operators is to participate in the open market.

Managing Director of Go2Power Consulting Goran Vukojević moderated the panel discussion

Region seen with 9 GW of BESS operating power in 2030

Ioanna Barouni from Aurora Energy Research said a total of 40 GW of solar and wind power is expected to be online at the end of 2025 in the SEE region, comprising 12 countries, including Hungary. In 2030, the level is expected to reach 70 GW, which is expected to be doubled to 145 GW by mid-century. As for BESS, projections stand at 9 GW in 2030 and 25 GW in 2050.

Barouni: We miss flexibility and ancillary services for transmission and distribution system operators

The countries of the region are retiring power plants that use fossil fuels, a firm capacity, in Barouni’s words, while adding renewables. “It’s not very easy to predict how the generation profile is going to be during the day, so we miss flexibility and we miss ancillary services for TSOs and DSOs,” she said.

The gap between power prices for midday and the evening is gradually increasing. Barouni explained that batteries “create some artificial demand and absorb these low prices.” At peak demand and with less renewables, a battery can replace expensive fossil fuels, lowering the price.

Ioanna Barouni from Aurora Energy Research (pictured left) and Head of Specialized Lending at UniCredit Bank Serbia Svetlana Cerović

Serbia preparing auctions for ancillary services

Division Manager of transmission system operator (TSO) EMS Nikola Tošić acknowledged that Serbia is preparing auctions for ancillary services. He revealed that there would probably be one auction for 70% of the needed reserve in the first year. The next rounds would be more frequent, shifting toward daily auctions for balancing capacity.

In the verification process, EMS’s System Operation Department will first test the battery, Tošić added. State-owned power utility Elektroprivreda Srbije (EPS) already provides ancillary services to the TSO, so it won’t require tests, he asserted.

Serbian law defines ancillary services the same as European Union does

EMS drafted the new grid code, and it will publish the draft balancing market code for public discussion soon, according to Tošić. He said the domestic law defines ancillary services in the same way as the EU defines them in its legislation. One part is balancing services: frequency containment reserve (FCR, primary), automatic frequency restoration reserve (aFRR, secondary) and manual frequency restoration reserve (mFRR, tertiary). The other part are non-frequency services – energy.

“We think that it would be good to incentivize the periods of the year or periods of day when the needed amount of reserve is more attractive or more in demand,” Tošić said.

Market Division Manager of EMS Nikola Tošić

Fortis Energy moving ahead with battery investments regardless of government support schemes

Fortis Energy’s Chief Executive Officer for Eastern Europe Nikola Oklobdžija considers the lack of regulation to be the biggest challenge for developers. An investor can currently only focus on charging the batteries when the prices are low and sell when they are high, he underscored.

The Turkey-based company develops photovoltaic, wind power and BESS projects in the region. The first bigger investments in renewable electricity plants with energy storage are the ones that will break the ice, in Oklobdžija’s opinion.

“Of course, it helps if you have a CfD contract, so the banks will look at it more favorably,” he stated. Oklobdžija added that companies need to be able to present revenue to the lenders and what the fees are for renting the capacity or providing different services.

Bankability depends on state support and PPA contracts, cash flow models and insurance

In the meantime, Fortis is examining the experiences in Bulgaria and Greece, which have already held auctions for standalone batteries. Financing a project is easier with a CfD – contract for difference, but the company is determined to push ahead anyway, Oklobdžija stressed.

In North Macedonia it commissioned a solar power plant in Oslomej and recently contracted a BESS to be added to the facility. Oklobdžija said it wasn’t a requirement but that Fortis opted for energy storage because of market pressure with prices and occasional curtailments, like during Easter last month.

The introduction of ancillary services would facilitate the development for standalone battery systems, he explained.

Fortis Energy’s CEO for Eastern Europe Nikola Oklobdžija

Cerović: First there will be more projects for colocated BESS units than for standalone facilities

Head of Specialized Lending at UniCredit Bank Serbia Svetlana Cerović highlighted the intensive activity in Germany and Italy, for instance, but also in neighboring Romania. UniCredit is present in those markets and is analyzing the development of the battery storage market, she pointed out, arguing that the best practices in the EU are the best way for building and financing battery storage.

Cerović said there would first be more projects in the region for BESS colocated with renewable energy plants than standalone units.

She suggested that the proposed investments that include storage should be better pondered at the next renewable energy auction in Serbia. It is in the country’s interest to enable providing flexibility and to support the projects, she said.

There may be a rationale for subsidizing prosumers to add storage in Serbia, Cerović said. Turning to small-scale projects, she expressed the belief that power purchase agreements (PPAs) are “convenient” for them. She is recommending dedicating a certain capacity for the category at the next auction in the country.

The first projects in Serbia, conditioned by energy storage requirements for a grid connection, are in the process of negotiating financing, according to Cerović.

Fire protection is especially significant for insurers

Renewable Energy Insurance Broker (REIB) has insured some 4 GWh of energy storage capacity in Bulgaria and just as much elsewhere in the world, Business Development Manager Dimitar Dimitrov said. Developers should contact insurance companies when the design is done, as well as for cargo insurance, he suggested and added it is particularly important for projects that get subsidies.

“We’re not only insurance brokers, but we’re also investors, which helps us understand a bit more about the clients’ needs, and what we can definitely do more in cases of coverage. Understanding clients’ needs helps us also prevent risks that could occur during certain stages,” Dimitrov stated.

Most insurers prefer at least a six-meter distance between containers or rows of three to four containers holding batteries, he said. It is the most important factor in fire protection, in Dimitrov’s opinion. When the distance is shorter than three meters, a firewall is required for insurance, he explained.

REIB’s Business Development Manager Dimitar Dimitrov

The next segment is construction insurance. For insurance companies, it is not a higher risk profile, Dimitrov asserted. Next, he recommended operational risk insurance including coverage for business disruption, and insurance against cyberattacks. In such events, the grid connection can be damaged, the company’s representative pointed out. “Insurance policies are definitely bankable,” he added.

Bulgaria has completed its tenders for state support to BESS combined with renewable energy plants, and for standalone units. But even before subsidies, batteries have been delivered and facilities are under construction, Dimitrov stressed. Many photovoltaic projects in Bulgaria have emerged in the past few months and most of them include BESS, he said.

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May 26, 2025
by in News

BEF 2025: Corporates’ education, product diversification crucial to speed-up PPA uptake

Capacity building and education for corporates, together with product diversification and an upgrade of the regulatory framework, could clear the obstacles for power purchase agreements in the Western Balkans, which are lagging behind the other countries in Southeast Europe. In addition to their other benefits, such contracts could contribute to securing baseload energy from hybrid facilities, given that baseload is a key issue for the decarbonization of the region, according to the participants of a panel on power purchase agreements, held at Belgrade Energy Forum 2025 (BEF 2025).

BEF 2025 has gathered four hundred participants from more than 30 countries in the region, Europe, and beyond.

The panel PPAs as a key to renewable energy growth in SEE featured stakeholders from all segments of the PPA market: developers, corporates, utilities and consultants. The discussion comprised five segments – the global trends, main drivers, the region’s specifics, challenges and trends, and the implications of the model.

The panel’s moderator was Mislav Slade-Šilović, Energy, Utilities & Resources Consulting Leader for Southeast Europe and member of the core PPA team at the consultancy PwC.

Global trends: PPAs are hot, but the solar capture rate is becoming an issue

Mislav Slade-Šilović, Joffroy Beckers and Nikola Gazdov

According to Natalija Ljubić, Manager of PPA & BESS Transactions at Pexapark, PPAs are still hot in Europe. On a monthly basis, between 500 MW and 2,000 MW of new PPAs are signed (15 to 30 deals). She referred to long-term, fixed-price PPAs considered bankable and publicly announced. There is much more together with short-term PPAs, for two to three years.

There is an impression that everything comes down to corporate PPAs, but there are many utility PPAs that aren’t always made public, she added.

The majority are physical PPAs but Pexapark is registering more and more financial PPAs. In 2025, almost 20% of all the announced PPAs were financial, whereas a couple of years ago, they made up 5% to 10%. There are more pay-as-produced contracts than the monthly ones for baseload energy.

Mislav Slade-Šilović (PwC) added that 70% of PPAs in SEE are virtual or financial.

It’s quite challenging in the region to find a creditworthy counterparty on the consumer side

For developer Joffroy Beckers, Head of PPA at DRI, it’s quite challenging to find a creditworthy counterparty on the consumer side of the market in the region comprising Greece, Bulgaria and Romania. So when the firm wants to speed things up with selling its electricity, it goes to utilities or traders.

Negative prices are emerging in the region, with much more cannibalization for solar in the long term, he added.

According to Bulgaria’s Association for Production, Storage, and Trading of Electricity – APSTE, the situation in the region is different than five years ago. “There were zero PPAs in the region, but now they start to get common. Paradoxically, the conditions start getting much more and more complex,” chairman Nikola Gazdov said.

Mislav Slade-Šilović (PwC) pointed to the decline in the solar capture rate – the ratio of the price of solar power and wholesale price. It is spilling over to the PPA price and increasing its complexity, and solar PPAs are generally more complex than the ones for wind power, he added.

Main drivers: Different priorities ask for different PPA models

Natalija Ljubić, Ivana Đurović and Davor Pupovac

For Ivana Đurović, Category Manager Renewable Energy at Knauf Group, PPAs are a game changer in energy procurement because essentially it’s no longer just about buying energy or hedging. “Now corporate PPAs bring the long-term deal, so they even extend the tenure for those hedging, and they also allow us to achieve our sustainability targets,” she explained.

PPAs aren’t for companies with consumption below 30 GWh or 40 GWh per year, while branding and cost savings are often the reasons for companies to sign them.

Such factors determine the PPA product that the offtaker opts for, Mislav Slade-Šilović (PwC) stressed.

According to Nikola Gazdov (APSTE), in the region comprising Bulgaria, Romania, and Greece, PPAs are usually signed by corporates that have some ESG commitments or want to show their clients and customers that they are thinking green.

The key feature of a PPA is the partnership between two companies

As examples of the various kinds of deals, he mentioned a physical PPA with an electricity-intensive consumer, virtual PPA with a telecom and a PPA with a big international company producing tires, combining the two types.

As a developer, DRI is modifying its strategy toward a mixed portfolio. Instead offering a solar asset for a PPA, it adds wind power plants and combines different technologies into a single contract. “It allows us to capture a better price, and this is also usually more beneficial for the off-taker. The second thing is that we’re trying to keep this upside in our PPA by entering a floor price instead of a fixed price,” Joffroy Beckers (DRI) revealed.

For Mislav Slade-Šilović (PwC) the key characteristic of a PPA is the partnership between two companies. It needs to be balanced, to ensure that both parties can fulfill throughout the tenure. If one goes bankrupt, then it doesn’t make sense for both parties, he underlined.

The specifics in the region: Corporates need to learn, PPAs should be more diverse

Nikola Gazdov, Natalija Ljubić and Ivana Đurović

Serbia’s state-owned power utility Elektroprivreda Srbije (EPS) has been signing a lot of PPAs. However, the difference from the conventional deals is that they are based on premiums. But according to Davor Pupovac, head of the company’s market analysis and risk management, it is interested in corporate PPAs that don’t include government support. There is not much interest among consumers for corporate PPAs with EPS, he revealed.

Mislav Slade-Šilović (PwC) said the role of EPS and big power utilities is very important in developing the PPA market. A dominant supplier in a market has a critical role, either as a sleever or as someone that will provide B2B products to off-takers and developers or producers for entering the market, he said.

Joffroy Beckers (DRI) agreed with him about the role of big utilities in facilitating PPAs and expressed the belief that in the near future, they would get a larger share as intermediaries.

Asked if corporate PPAs are coming anytime soon in Serbia, Davor Pupovac (EPS) said: “Not so soon.” However, he claimed EPS wouldn’t lose consumers regardless of the fact that it has no such product.

Corporates aren’t super ready for PPAs because they are seeking stability when it comes to the energy price

In Ivana Đurović’s (Knauf) view, there are several reasons for the slow uptake of corporate PPAs in the Western Balkans. Corporate buyers aren’t super ready for PPAs because they are seeking stability when it comes to the energy price, but the pay-as-produced PPA model is dominant in the market, which doesn’t ensure price stability. Monthly baseload deals would enable more price stability.

A bigger offtake through PPAs requires corporates to build their capacity for closing such deals and for the offer to be more diverse, she stressed.

Natalija Ljubić (Pexapark) agreed with her and suggested that companies need to understand more about the risks and accounting. Also, not many corporates are willing to enter five- to ten-year agreements as they don’t know their demand or costs that far ahead, Ljubić underlined.

Challenges, risks: Management boards are delving into energy-related topics in detail

Ivana Đurović and Davor Pupovac

Creditworthiness is one of the key challenges, Joffroy Beckers (DRI) said. As he sees it, credit insurance could be key, providing a kind of a state guarantee. Nikola Gazdov (APSTE) again stressed education. He also recalled that all European countries needed time to get along with PPAs.

“But coming to credit risk, I think that now we also see the European Commission taking note of the situation,” Gazdov noted.

As for education, Mislav Slade-Šilović (PwC) said it requires one to two years. Management boards of companies from different industries on the offtake side are forced to delve into energy-related topics in detail, he noted.

There are practically no obstacles for PPAs in Serbia

Slade-Šilović asked EPS’s representative whether the utility is prepared to offer B2B products, arguing that they go hand-in-hand with PPA market development.

Davor Pupovac (EPS) responded that there are practically no obstacles to PPAs in Serbia. Namely, there is an electricity exchange, EPS is willing to sign contracts with developers for sleeving or balancing, the guarantees of origin (GO) system is in place, and EPS is active on power exchanges in the region as a producer and supplier.

“EPS could also offer a route to market to the off-taker. However, currently, it cannot offer access to the spot or forward market,” he explained.

Coming from a corporate electricity consumer, Ivana Đurović (Knauf) was curious what EPS could offer to a perfect corporate off-taker asking for a physical PPA. Pupovac answered that currently it would be a pay-as-produced deal.

What does the implementation bring us: hybrid combinations open the room for innovative deals

Joffroy Beckers, Nikola Gazdov and Natalija Ljubić

Mislav-Slade Šilović (PwC) summarized the landscape. “If you look at the broader EU situation and challenges, especially with solar capture rates, negative prices, we are now already discussing technology advanced structures including batteries and other hybrid solutions on the PPA side,” he underlined.

Natalija Ljubić (Pexapark) pointed out that last month in Germany the solar capture rate was just 40%, calling it almost unbearable for photovoltaic projects. All developers or energy producers, especially in the solar power sphere, are seriously considering adding batteries, while projects for standalone battery storage facilities are appearing, in her words.

She and Nikola Gazdov (APSTE) agreed that the outcome is a lot of interesting innovative structures, room for different solutions.

BESS with solar reduces cannibalization and increases capture rates

Ljubić said it is a challenge to maximize revenues from a battery system and make it bankable. Gazdov pointed to the dilemmas of a single company owning different assets versus a big utility combining and aggregating everything, and whether the producers or optimizers manage the revenue streams.

When it comes to standalone storage units, he sees a perspective only in arbitrage and, perhaps, system services further down the road.

Joffroy Beckers (DRI) explained the main purpose of a battery energy storage system (BESS) in Romania, from the point of view of a developer and power producer. A BESS combined with solar power reduces cannibalization and increases capture rate, whereas wind lowers the balancing cost, he stressed.

“If you co-locate a battery next to solar, you will be in a position to negotiate a higher price on the off-take side,” he pointed out.

A combination of wind, solar and batteries is equivalent to a new power plant

In the future, he anticipates more PPAs with a pay-as-nominated structure rather than pay as produced, arguing that it enables more flexibility for monetizing batteries on different markets.

“With those combinations of wind, solar, and battery, basically you have a new power plant, baseload structure,” Mislav Slade-Šilović (PwC) stated.

That way PPAs fit into the broader discussion on the energy transition and decarbonization. EPS is decarbonizing its production through its role as a renewable energy offtaker.

“Hybrid combinations are partly addressing the baseload needs. So, many different technologies, including storage, can provide a part of the answer this region heavily needs, and this is the baseload substitution problem,” Slade-Šilović concluded.

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May 21, 2025
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SANY Renewable Energy makes successful breakthrough in European market

SANY Renewable Energy, one of the world’s top five onshore wind turbine manufacturers, made its debut at Belgrade Energy Forum 2025 (BEF 2025) on May 14-15, showcasing its cutting-edge wind power technology and integrated solutions to the European market.

At BEF 2025, SANY attracted significant interest from various stakeholders thanks to the Alibunar 1 and Alibunar 2 wind farm projects, the company’s first investments in Serbia, which is one of the key markets for SANY in Europe.

SANY’s attendance at BEF 2025 not only demonstrates its competitiveness in the global clean energy industry but also lays a solid foundation for further expansion in the European market.

Innovative technology attracts attention as SANY gains broad interest from developers

As the most influential energy event in Serbia and the Balkans, BEF 2025 brought together government agencies, energy companies, and industry experts to discuss Europe’s energy transformation and sustainable development. At the event’s exhibition area, SANY focused on showcasing its large-megawatt smart wind turbines, smart wind farm management systems, and energy storage solutions. Its high power generation efficiency, low levelized cost of electricity (LCOE), and intelligent operation and maintenance drew the attention of numerous participants.

Serbian Minister of Mining and Energy Dubravka Đedović Handanović said during her visit to the SANY booth that the company’s wind power technology is impressive and highly consistent with Serbia’s renewable energy development goals.

“We look forward to working with such leading international companies to accelerate the country’s green energy transformation,” stated Đedović Handanović.

Deepening European presence and supporting carbon-neutrality goals

In recent years, SANY has continued to increase its development and growth in the European market. This high-profile appearance at BEF 2025 sends a clear signal of strengthening regional cooperation. During the forum, company representatives held multiple rounds of negotiations with energy companies and investment institutions in Serbia and neighboring countries to discuss planning and possible project and technical cooperation.

“Europe is a key market for the development of renewable energy. SANY Renewable Energy’s goal is to help customers achieve economic feasibility while increasing efficiency with its high-quality products and customized services,” said Paulo Soares, Managing Director of SANY Renewable Energy Europe.

“We are looking forward to working with all stakeholders in Serbia to jointly promote the global carbon neutrality concept,” he stressed.

Industry analysts believe that as the demand for renewable energy in Europe continues to grow, SANY is expected to capture a larger market share in Europe with its high-reliability wind turbines, intelligent operation and maintenance, and localization strategy, and become an important promoter of the global green energy transformation.

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May 20, 2025
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PPC starts building two battery storage systems in northern Greece

Public Power Corp. (PPC Group) is launching construction on two battery energy storage systems (BESS) in northern Greece, of 48 MW / 96 MWh and 50 MW / 100 MWh. There is currently no larger BESS in Southeastern Europe, but the Oslomej solar park in North Macedonia is expected to get a battery system of 62 MW in operating power by the end of the year.

PPC’s Melitis 1 battery system will be located in the vicinity of its future photovoltaic plants in the Western Macedonia region, and Ptolemaida 4 will be built in the area of the former Ptolemaida coal mines. The energy storage units are intended to support the operation of adjacent photovoltaic plants.

The battery systems are targeted for completion within the year

The systems will use liquid-cooled batteries with the lithium iron phosphate (LFP) technology, maximizing both energy utilization and safety during operation, according to a statement from the Greek company, controlled by the government through a minority stake. It expects to complete the construction within the year.

PPC Group’s investment plan for the 2025-2027 period envisages BESS projects totaling 600 MW, which are currently at various stages of implementation in Greece and elsewhere in Southeastern Europe.

Konstantinos Mavros, the group’s deputy CEO responsible for renewable energy sources, said PPC is a leader in investing in energy storage systems. “In the coming years it will significantly increase investments in all flexible generation systems through energy storage,” he stated.

PPC plans 600 MW of battery projects in Southeastern Europe

PPC Group recently started building a battery system in neighboring Bulgaria with 25 MW in operating power and a capacity of 55 MWh. The facility would support the operation of a new solar power plant with a total capacity of 165 MW.

The company runs renewable energy systems with a total capacity of 6.2 GW in Greece, Romania, Italy, and Bulgaria. Its investment plan envisages increasing the capacity from renewables to 11.8 GW by 2027. PPC’s strategic goal is to expand into new renewable energy technologies, such as offshore wind farms and floating solar parks.

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May 20, 2025
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Alteo’s Chikán: Aggregators have AI solutions for grid stability, production optimization (video)

Factors like power price volatility, the global shift in policy making and the need for flexible solutions for the integration of renewables are creating an important momentum for developers and aggregators, Chief Executive Officer of Alteo, Attila Chikán, said at Belgrade Energy Forum 2025. The company is expanding in Central and Southeastern Europe with investments in power plants and its AI-backed platform for operating third-party assets.

The electricity system needs to become more and more flexible to accommodate weather-dependent, intermittent sources – solar, wind and hydropower, Alteo’s CEO and Chairman of the Board Attila Chikán said and pointed out that the outage in Spain and Portugal on April 28 highlighted the need for investing in grid stability and upgrades.

In his keynote speech at Belgrade Energy Forum (BEF 2025), he stressed that a global shift in policy making in the sector, particularly in the United States and Europe, is bringing both challenges and opportunities. In Chikán’s view, the situation creates an important momentum for developers and aggregators.

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“In the past five years we have seen a great deal of price volatility on the markets in the region. If you look into the future, taking into account the impact of the ambitious plans of regional countries to expand renewable power, one might expect even more pressure on balancing price volatility,” he asserted.

Role of international initiatives

Alteo’s CEO said tailored incentive mechanisms are essential for developing a balanced energy mix. There are also major endeavors on an international scale, Chikán added: connecting markets with diverse geographical characteristics, power plant portfolios and different supply-demand balances.

He explained that cross-border initiatives such as PICASSO and the Blue Sky project bring electricity exchanges in the region closer together. Interconnectors like the Pannonian Corridor and the proposed Black Sea green cable contribute to balancing and the management of energy price volatility, Chikán noted.

Future-proof tech solutions required for risk mitigation

In risk mitigation, the energy system’s stability benefits from future-proof technological solutions as well, namely smart metering, advanced weather forecasting and artificial intelligence–based production optimization, he said. This is where aggregator companies like Alteo come into the picture, its chief underscored.

As for its hardware, the company based in Budapest operates a diverse and balanced production portfolio of gas power plants and renewables, combined with storage, Chikán added.

Alteo runs a portfolio of gas power plants, renewables and storage facilities

“Sounds good, but without a well-designed and functional software, any hardware is purely a collection of materials. And even if they do operate, for sure they operate in a suboptimal way, without synchronization,” he stated.

That’s why Alteo developed its own production management platform, which it offers as a software-as-a-service (SaaS) solution as well. The company also supports the operation of 2 GW in third-party capacity, mostly photovoltaics.

“We optimize production in an automated way, using artificial intelligence, integrating real-time weather forecast data, capacity data and market data,” Chikán stressed.

The platform includes executing trading activities. The partners don’t have to deal with scheduling and the balancing energy costs, he said. The company makes a renewable electricity product closer to baseload, Alteo’s head asserted.

Slovakia, Croatia, Serbia are primary investment destinations in Alteo’s regional expansion

Early this year, the company unveiled a strategy for expansion in Hungary as well as into Slovakia, Croatia and Serbia as primary investment destinations. Alteo revealed it is interested in Poland, Czechia, Slovenia, Bosnia and Herzegovina, Montenegro and North Macedonia, too.

Chikán said it also aims to position itself in operations and maintenance (O&M), among other segments. Alteo is particularly seeking stable and reliable AI-based aggregator partnerships, he noted. The company has an investment target of up to EUR 3.5 billion by the end of the decade.

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May 16, 2025
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Weakness in Serbian energy system is no option

Serbia’s state-owned power utility Elektroprivreda Srbije (EPS) is committed to its own and the country’s goals for green energy and emission cuts, but it is sustainable only if it doesn’t jeopardize energy security, Chief Executive Officer Dušan Živković said. Weakness in the energy system is not an option, he underscored.

The recent blackout in entire Spain and Portugal and the one last year in the Balkans have imposed the topic of large energy storage facilities which would support the integration of renewables, CEO of EPS Dušan Živković said at Belgrade Energy Forum (BEF 2025). The company is committed to its own and the country’s goals for green energy and emission cuts, he asserted.

“We will work on that, of course, believing in these objectives, but without compromising energy security and the energy sovereignty of the state of Serbia. It was proven to be the only sustainable path and that if we don’t follow it, it can result in situations that are not a good message toward consumers, and they are not a good message toward investors either. Weakness in the energy system is certainly not an option”, Živković stated.

In its Integrated National Energy and Climate Plan (INECP or NECP), Serbia is targeting for 2030 a 45.2% share of renewable energy sources in electricity production and a decrease of greenhouse gases by 40.3% from the 1990 level.

Decarbonization is not easy without serious storage

Among its other activities, EPS is working on its small green energy projects on open cast coal mines, while the strategic partner, a consortium of UGT Renewables (UGTR) and Hyundai Engineering, is tasked with building a group of solar power plants of 1 GW in combined connection capacity alongside 200 MW of battery energy storage, and transfer them to Serbia’s government-controlled power utility, Živković noted. But the process of decarbonization with necessary renewable energy capacity won’t be easy “without serious storage,” he stressed.

Serbia hosts fossil fuel power plants of 4 GW in total

Big energy storage projects are financially challenging, only marginally cost effective, and they are not easy to build, EPS’s head claims. They are necessary to be able to draw enough baseload energy, and in Serbia they need to contribute replacing a large fossil fuel capacity – currently it amounts to 4 GW, Živković said.

Pumped storage hydropower project Bistrica, existing facility Bajina Bašta enable comfort for signing PPAs

EPS primarily focuses on the Bistrica pumped storage hydropower project and the possibility to develop the one for Đerdap 3, he added. That way conditions would be created for the facilities to provide new services in the market, so “the region feels safer, too,” Živković underscored.

Counting on Bistrica and the existing pumped storage hydropower plant, Bajina Bašta, EPS is in “a comfortable zone” for signing power purchase agreements (PPA) with companies for their green power plants, Živković explained. Bajina Bašta is undergoing the second half of reconstruction works.

Turning back to the April 28 collapse of the Iberian electricity system, Živković pointed to the adverse interest of private investors – get profit in the short term – and companies responsible for energy security. In his view, it is necessary to act “more intergenerationally responsibly” and very important to find balance in relation to profits.

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May 16, 2025
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BiH laying groundwork for battery energy storage systems

Bosnia and Herzegovina is set to have its first battery energy storage systems installed in the transmission network, which will provide auxiliary services.

The State Electricity Regulatory Commission is drafting a decision to allow battery energy storage systems (BESS) to offer secondary frequency regulation, Mirza Kušljugić, a member of the Board of the Regional Center for Sustainable Energy Transition (RESET) from BiH, said at Belgrade Energy Forum 2025 (BEF 2025).

Since such a decision does not require a lengthy regulatory procedure, and the balancing market is already regulated, batteries could be installed very soon, he noted.

“I anticipate that private investors will take the lead in this initiative,” Kušljugić added.

He stressed the importance of experimenting with new technologies, noting that batteries represent a technology that can fundamentally transform the energy paradigm.

To be economically viable, batteries must serve multiple functions

The cost of batteries has significantly decreased in recent years. For instance, prices fell by 40% last year and have decreased by an additional 5% so far this year.

According to Kušljugić, batteries should not be limited to providing arbitrage but should also perform additional roles.

“Batteries come in various sizes – small, medium, and large – each with specific functions. They can regulate voltage or enable a black start, especially when equipped with new grid-forming inverters. This is a disruptive technology. It doesn’t matter whether it is installed on the transmission grid, the distribution grid, or behind the meter,” noted Kušljugić, who moderated the BEF panel titled Energy revolution underway – uniting efforts to deliver green, intelligent and sustainable energy solutions.

He added that batteries in the transmission system need to perform two or more functions, including frequency regulation.

Behind-the-meter batteries are also on the way

Historically, secondary regulation in BiH has been provided by any entity capable of offering flexibility, typically through tenders. So far, the service has mostly been provided by hydropower plants. However, due to lower nighttime prices, their operators were not interested in continuing to supply the service, leading to a shortage of secondary regulation. Batteries now have the potential to fill this gap.

Kušljugić believes that batteries installed behind electricity meters will soon become a reality in BiH as well. Currently, there are 300 to 350 MW of solar power capacities installed on the roofs of business premises, but their owners cannot feed excess electricity into the grid. It is only a matter of time before battery prices decrease enough to facilitate their installation, he underlined.

RESET, which advocates for citizen energy and prosumers, suggests that all solar installations should now be equipped with hybrid inverters, making them ready for future battery integration.

This approach is essential for the distribution grid to be ready to integrate excess electricity, Kušljugić concluded.

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May 16, 2025
by in News

Consortium completing spatial plan for solar-BESS strategic partnership in Serbia

Representatives of Hyundai Engineering and UGT Renewables, the companies developing a solar power project in Serbia of 1.2 GW in total, and with batteries, said the strategic partnership is a step toward expansion in the surrounding region. Spatial planning is nearly complete.

Following the signing of grid connection contracts last week, the Hyundai Engineering – UGT Renewables consortium is advancing the design and permitting procedures within its strategic partnership in Serbia.

The two companies are tasked with building a group of photovoltaic plants of 1.2 GW in total peak capacity and connections of 1 GW overall, alongside battery energy storage systems (BESS) with a combined 200 MW in operational power and a maximum 400 MWh in capacity.

Group of hybrid power plants to be transferred to EPS

In a keynote speech at Belgrade Energy Forum – BEF 2025, Vice President of Hyundai Engineering Seung-Won Lee revealed that the consortium is finalizing the special plans for special purpose areas. The facilities will be handed over to Serbia’s state-owned power utility Elektroprivreda Srbije (EPS), he noted.

The representative of the South Korea–based company added that the PV plants would generate 1.5 TWh per year and offset more than one million tons of carbon dioxide emissions. It is one of the largest renewable energy projects in Europe and a cornerstone for Hyundai Engineering, Lee pointed out.

UGT Renewables has project pipeline of 20 GW

Global Executive Advisor of UGT Renewables Chan-Woo Park said it is the largest renewable energy developer, internationally, in the United States. Its portfolio of companies is operating on four continents, he added. The regions include Southern Africa, the Middle East and Latin America, Park underscored.

The solar power and energy infrastructure projects under development account for 20 GW, UGT’s representative asserted.

 

It has established partnerships worth over USD 30 billion altogether, with Hyundai Engineering and other companies including Nextracker, Shoals Technologies, Hitachi Energy and Tesla Energy, Park stressed.

According to the update, the strategic partnership in Serbia is the beginning of the consortium’s regional expansion in the surrounding region.

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May 15, 2025
by in News

Negative prices threaten future payments to Greek renewable energy producers

Greece’s special account for renewables, which covers support payments to renewable energy producers, turned positive again in 2024 after years of instability.

The account is currently manageable, according to data from the Renewable Energy Sources Operator & Guarantees of Origin (DAPEEP). The update is bringing certainty to the market and reassures investors that their power plants won’t come up short.

For the end of 2025, initial projections show a deficit of EUR 173 million, which would be covered by a EUR 70 million reserve and proceeds from the taxation of diesel sales.

Lower wholesale prices reduce income

However, DAPEEP’s leadership is concerned about the future balance. The reason is the effect of zero or negative wholesale power prices as they are becoming more common than before.

In the trading session for May 1 on the day-ahead market of the Hellenic Energy Exchange (HEnEx), a record low hourly price was registered, EUR 50 per MWh below zero. The event occurred amid high solar production in combination with low demand on a holiday, and similar conditions in neighboring markets. The authorities are expected to allow the formation of negative prices in the balancing market, starting in June. It is expected to lead to more common zero and negative prices.

Low market prices harm the special renewables account, according to DAPEEP’s new CEO Dimosthenis Voivontas. Consumers benefit in such situations but they reduce income for the operator.

So far, the exact effect of negative prices remains to be seen, as there is limited data to analyze. Nevertheless, energy storage must be brought online quickly, together with demand response capabilities, says Viovontas.

Producers switch off to avoid negative prices

Negative hourly prices have led producers to switch off their renewable energy plants lately in order to avoid a financial loss. It is making it more difficult for the Independent Power Transmission Operator (IPTO or ADMIE) to conduct daily scheduling. The authorities are worried that a sudden disconnection of large capacities could result in instability, in light of the recent blackout in Spain and Portugal.

The focus is on aggregators, which represent groups of renewable electricity facilities in the market. Currently they lack the means to completely control their production in real time. Discussions are underway about a mutually acceptable solution.

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May 14, 2025
by in News

Electrohold Trade partners with TMH to optimize 2.5 GWh of battery storage in Bulgaria

Early next year, The Mobility House (TMH) is set to ramp up the aggregation of Electrohold’s energy assets in Bulgaria under a newly signed deal. It focuses on the planned 2.5 GWh in battery energy storage systems (BESS).

Electricity trading firm Electrohold Trade selected The Mobility House (TMH) to provide advanced aggregation and trading software. The solution will optimize the Bulgarian firm’s portfolio, enhance returns from its energy assets, and support the electricity system’s balance and stability, according to the announcement.

The subsidiary of Eurohold Bulgaria’s or Eurohold Group (Evrohold) manages a pool of photovoltaic assets and battery energy storage systems. The assets are expected to reach 1 GW and 2.5 GWh, respectively. The full commercial rollout is targeted to begin in the last quarter of 2025, with further rampup expected into early 2026, the company said.

TMH GOING Far beyond traditional feed-in models

Germany-based TMH is active since 2016. Electrohold Trade said it is leveraging the aggregator’s technology to commercialize energy storage systems and maximize returns on its solar power assets through advanced flexibility and intermittence trading – going far beyond traditional feed-in models.

TMH stressed that Electrohold’s energy storage initiative is the largest in Europe.

Colocation project with signaling impact

A defining feature of the initiative is its colocation concept, where battery storage systems are installed directly adjacent to solar parks. It enables optimal utilization of both assets, the companies said. By directly linking them, the fluctuating output of renewable energy can be more effectively managed – enhancing grid stability while minimizing the need for expensive grid expansions.

It not only results in improved grid flexibility, but also contributes to the grid’s better balancing, the update reads. The project positions battery storage systems as a central element in Bulgaria’s future energy landscape, leveraging advanced algo trading software and innovative incentive structures to unlock the full potential of renewable integration, the partners added.

“By strategically employing colocation solutions and the latest technology, we are creating a platform that is not only economically attractive but also significantly enhances the technical resilience of the Bulgarian power grid at lower costs,” said Eurohold Bulgaria’s Chair of the Supervisory Board Assen Christov.

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