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Alteo building solar park with battery storage for MOL Group

MOL’s 37.4 MW solar power plant with a battery energy storage system (BESS) of 40 MWh will contribute to the energy independence of its oil and gas complex in southern Hungary. Alteo is the contractor building the facility. The battery segment has received grants totaling EUR 20.5 million.

MOL Group marked the start of construction of a solar park and BESS at its Algyő site in Csongrád-Csanád county. The Hungarian company pointed out that smart green transition, reducing external energy consumption, is a key element of its Shape Tomorrow strategy.

The investment will significantly contribute to the energy independence of the oil and gas complex in southern Hungary, improve the flexibility of electricity supply and lower the site’s CO2 emissions by 13,000 tons per year, according to the announcement.

MOL Group hired Alteo, in which it holds minority stake

The photovoltaic plant project is for 37.4 MW and the battery energy storage system would have 40 MWh in capacity. Alteo, listed at the Budapest Stock Exchange, is the contractor for the construction of the facility. MOL Group, which holds a minority stake, controls a total of 73.8% of its shares together with two private equity funds.

The company’s full name is Alteo Energy Services. As an aggregator, it owns or operates gas power plants and renewables, combined with energy storage, while also providing software as a service (SaaS).

Storage is essential for smart energy transition

MOL has won support of EUR 20.5 million in total for the energy storage project in Algyő. A EUR 6.7 million grant came via the European Union’s Recovery and Resilience Facility (RRF) and Hungary’s National Recovery and Resilience Plan (NRRP), while the government secured the remainder.

“Our strategic goal is a smart energy transition, for which energy storage is essential, as it ensures the integration and flexible use of sustainable energy systems. Algyő is a symbolic location for us – it is here that six decades of industrial experience meet the technology of the future,” said Managing Director of MOL Exploration and Production Hungary Péter Archibald Schubert.

Solar power capacity in Hungary has topped 8 GW

The solar power plant’s output is equivalent to the annual consumption of 22,500 households in the county, while the BESS can flexibly cover 7,300 households, he added.

MOL Group operates seven solar parks in Hungary and two in Croatia, of 111 MW altogether. Its goal is to reach 200 MW in renewable energy capacity by the end of next year.

Alteo will operate MOL’s other battery energy storage system, in Tiszaújváros

Of note, the company broke ground in March for a 40 MWh battery system at the MOL Petrochemicals site in Tiszaújváros, in northeastern Hungary. It selected Alteo as its operator. The investment is worth EUR 16.3 million, of which EUR 6.7 million is a grant from NRRP.

As for the PV and battery investment in Algyő, the local authority made the 47-hectare site available to the integrated hydrocarbons producer, Hungarian media reported.

At the ceremony, Deputy State Secretary for Energy Transition at the Ministry of Energy Viktor Horváth said that the country’s solar power capacity has surpassed 8 GW. It is ninth in the world in PV capacity per capita.

In other storage news, MET Group inaugurated the largest BESS in Hungary last week at its gas power plant near Budapest.

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MET Group inaugurates Hungary’s largest battery energy storage system

MET Group installed a battery energy storage system of 40 MW and a two-hour duration at its gas power plant Dunamenti near Budapest. The company said it is the largest BESS in Hungary.

Hungary’s largest standalone battery energy storage system (BESS) has been inaugurated today. MET Group put into operation a facility of 40 MW in nominal operating power and a two-hour cycle, translating to 80 MWh in capacity. The Switzerland-based company said it is part of a series of its investments in BESS throughout Europe.

MET already installed a 4 MW / 8 MWh demonstrator unit in 2022, also at its gas-fired Dunamenti Power Station in Százhalombatta, in Pest county. It is based on Tesla Megapack 2 batteries.

The combined capacity would be sufficient to supply the entire decorative and public lighting needs of Budapest for four hours, the energy company pointed out. The supplier of the new equipment is Huawei Technologies and the main contractor is Forest-Vill, MET Group added.

BESS is essential for energy transition

Battery energy storage systems are a key element for the energy transition, as they allow greater penetration of renewable sources into the power grid, Dunamenti’s Chief Executive Officer Péter Horváth said at the inauguration ceremony.

“We must strive by all possible means to exploit Hungary’s renewable energy sources as extensively as possible, using well-established, cost-effective technologies. Therefore, the Hungarian Battery Association supports the efforts of the Hungarian energy policy, which deals with the green energy transition as a top priority,” the association’s President Péter Kaderják stated.

MET Group investing in batteries colocated with solar power plants

MET Group said that with its ongoing investments in BESS projects across Europe, it aims to address the increasing need of balancing technologies to support the energy transition. The company acquired French battery storage operator and developer Comax in 2024.

A significant part of the investments is for storage facilities colocated with solar parks, the update reads.

MET is present in 17 countries, 32 national gas markets and 44 international energy trading hubs. It has more than 1,100 employees. The company’s consolidated sales revenue amounted to EUR 17.9 billion last year, with a total traded volume of natural gas amounting to 140 billion cubic meters and total traded electricity of 76 TWh.

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Gas power plant Brestanica in Slovenia adds photovoltaic unit

A ground-mounted solar power plant of 466 kW started generating electricity on a regular basis at Slovenian state-owned gas power plant Termoelektrarna Brestanica (TEB).

GEN-I’s subsidiary GEN-I Sonce installed a photovoltaic system, as the contractor, at the gas power plant run by fellow GEN Group member Termoelektrarna Brestanica (TEB). The 466 kW ground-mounted solar power plant entered regular operation, Naš stik reported.

The new facility in Brestanica in the municipality of Krško near Slovenia’s border with Croatia consists of 810 modules. The project was backed by the government’s renewable energy grant program. It covered 20% of the cost, which amounted to just under EUR 600,000.

MFE TEB4, the new unit, entered test operation in February. It is the fourth PV system at the Brestanica gas power plant. Two are on roofs and one is a solar canopy on the parking lot. Commissioned in 2009 and 2010, they have 170 kW in combined peak capacity.

The estimated annual production of the fourth solar power system can meet the electricity needs of more than one hundred Slovenian households.

Almost a third of the project budget was invested in the installation of a transformer. It enables more renewable electricity capacity to be connected to the grid around TEB, the article reveals.

GEN Group’s state-owned parent company GEN energija operates the Krško nuclear power plant, also known by the acronym NEK and, in Slovenian, JEK.

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TotalEnergies to build 100 MW solar power plant with energy storage in Cyprus

TotalEnergies is betting big on the solar power market in Cyprus. It won the environmental approval for a photovoltaic park of 100 MW in peak capacity, with energy storage. It intends to build it in an area previously designated for a golf course.

France-based TotalEnergies is an oil supermajor, but also one of the world’s largest renewable energy developers. The company is planning to build a photovoltaic system in Cyprus equivalent to a quarter of all the current capacity in larger solar power units in the country, even though the competition in the segment is enormous.

At the same time, grid stability in the island state is under jeopardy given the surge in PV investments and the lack of energy storage. According to a recent statistical report, Cyprus hosted almost 850 MW of solar power, of which less than 400 MW was in commercial photovoltaic plants. Prosumers operated the rest. Licensed projects amounted to 2.8 GW.

In the first five months of the year, according to the CyprusGrid tracker, 58% of green electricity production was curtailed, out of a potential 251 GWh, pv magazine reported. It compares to 29% in all of 2024, 13.4% the year before and 3.3% in 2022.

The Department of Environment has issued consent for TotalEnergies’ solar power project of 100 MW in peak capacity, Philenews reported. The company is conducting it in cooperation with Universal Green Energies. It is a subsidiary of Universal Golf Enterprises, the owner of the land.

The environmental authority’s positive opinion is valid for the duration of urban planning and other permits.

Environmental approval conditioned on wildlife protection, reforesting

The area of 200 hectares was originally intended for a golf course. It is on the territory of the villages of Vasa Kellakiou, Asgata and Sanida in the Limassol district.

The photovoltaic park would cover 83 hectares, of which 44 hectares would be under solar panels. The plan includes a substation and energy storage. Annual output is estimated at 160 GWh, equivalent to the electricity needs of 33,000 households.

The PV park would generate an estimated 160 GWh per year

TotalEnergies and its partner are obligated to protect fauna and flora and exclude water streams and protected zones from construction works. They are not allowed to install solar panels on land with a slope higher than 25%. The companies especially need to preserve the habitats of protected species, including the Bonelli eagle.

The environmental approval was issued with a condition to plant trees and shrubs instead of the ones that would be removed during construction.

Villagers concerned about environmental, economic impact

Some representatives of the local population in Sanida expressed concern, among other matters, over the effect of the planned solar park on the air temperature in the area. Residents of Asgata argued that the local community would benefit more from a golf course.

At the end of the first quarter, TotalEnergies had 28 GW of gross renewable electricity capacity installed worldwide. It aims to reach 35 GW by the end of the year and 100 GW in 2030.

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Maja Turković: Technology is our strongest card

The technological solutions needed to increase the share of renewable sources in Southeast Europe are already available and accessible, according to Maja Turković, Senior Vice President of CWP Europe. Countries in the region now need to adopt regulations to boost the deployment of battery storage and hybrid power plants, she said on the sidelines of Belgrade Energy Forum 2025.

“I believe that technology is our strongest card,” said Maja Turković, adding that its cost is decreasing, as are financing costs. Speaking at the panel on the ongoing energy revolution, she suggested that more financial resources are available than there are eligible projects.

The cost of technologies is decreasing, as are financing costs

Prices of solar panels have dropped 60% over the last two years, while battery costs fell by 40% by the end of 2024 and by a further 5% this year, to under EUR 100,000 per MWh, Turković pointed out at the panel, titled Energy revolution underway – uniting efforts to deliver green, intelligent and sustainable energy solutions.

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She said that integrating batteries with solar power plants is the latest trend, but that transmission system operators in the region still do not allow it. However, in some countries, a grid connection approved for solar can also be used for batteries, she noted.

Integrating solar with batteries is the latest trend

Turković expressed the hope that regulations in the region will follow the technological evolution. “We hope to improve the preparedness of countries in the region to adopt appropriate regulations and to increase the capacity of battery storage and hybrid power plants in general, which are far more desirable for the system itself,” she stressed.

Talking about CWP Europe, Turković recalled that the company is developing projects for wind power plants, solar power plants, and battery storage in nine countries, and that it has also begun diversifying into hybrid power plants. She added that the company is also developing its own battery management software for short-term power markets.

CWP Europe recently signed the largest single power purchase agreement (PPA) for a solar project with Serbia’s state-owned power utility Elektroprivreda Srbije (EPS), marking a major milestone in the country’s energy transition. The PPA was signed for the 150 MW Solarina photovoltaic park that CWP Europe is developing in eastern Serbia.

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PV plant built next to Slovenia’s only pumped storage hydropower plant Avče

Slovenian company Soške elektrarne Nova Gorica (SENG) commissioned its first solar power plant – Kanalski Vrh. The facility is at its Avče pumped storage hydropower plant, the only one in the country.

Surfaces around large infrastructure such as railways are convenient for photovoltaics as there are very few options for the utilization of such sites. Existing power plants, including hydropower plant reservoirs, are even better locations, as they provide access to strong grid connections and transformers.

With its strict environmental and social regulations and standards, Slovenia is struggling to determine suitable locations for wind turbines, but also larger ground-mounted solar power plants. But state-owned power utility Soške elektrarne Nova Gorica (SENG) managed to fit a photovoltaic system on the banks of the upper reservoir of its Avče pumped storage hydropower plant, in cooperation with the local community.

Kanalski Vrh solar power plant hooked to existing power line

The 2.9 MW solar power plant north of the village of Kanalski Vrh is connected to an existing 20 kV power line. The hydropower operator estimated the annual output at 3.3 GWh. It plans to expand the PV facility to 8 MW by the end of next year.

The first phase was worth EUR 2.2 million. The firm, part of Holding Slovenske elektrarne – HSE Group, used its own funds and won government subsidies.

Area gets natural science park, cycling paths together with PV facility

In the local spatial planning process, Kanalski Vrh got a natural science park and walking and cycling paths. SENG’s first solar power plant spans two hectares and consists of 4,736 modules.

“We have witnessed increasing opposition to the construction of new energy facilities for the production of electricity from renewable sources, but the Kanalski Vrh solar power plant is proof that projects can be successfully completed in an open and transparent dialogue with the local community,” Managing Director of HSE Tomaž Štokelj said.

Avče is the only pumped storage hydroelectric plant in Slovenia. It has 180 MW in pumping mode and 185 MW for production. Avče and four out of five SENG’s hydropower plants on the Soča river are in the municipality of Kanal ob Soči. The first one, Doblar 1, was built in 1939.

Kanal ob Soči is at Slovenia’s western border, with Italy. The firm also operates a group of small hydropower plants.

If the operation of a solar power plant is integrated with a hydroelectric facility, as a hybrid power plant, it can help save water on sunny days.

Slovenia hosts two other PV facilities next to hydropower plants: Brežice and Zlatoličje-Formin.

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Wind power investments in Turkey surge as major plants inaugurated in May

Investments in wind power in Turkey are on an upward trajectory – this year they are expected to surpass USD 1.5 billion, translating to 1.5 GW of new capacity, President of the Turkish Wind Energy Association (TÜREB) Ibrahim Erden estimated. Among other factors, the country has an extensive manufacturing base for the equipment. Several major wind farms were inaugurated last month.

The first wind turbine in Turkey was installed in 1998, and now total capacity is nearing 14 GW. The growth rate is picking up amid administrative reforms and state support through renewable energy auctions, requiring a high rate of domestically sourced equipment.

President of the Turkish Wind Energy Association (TÜREB) Ibrahim Erden said investments last year amounted to USD 1.3 billion, with 1.3 GW installed. The figure will top USD 1.5 billion in 2025, resulting in over 1.5 GW of new capacity, in his view.

Erden attributed the expansion to new licenses for projects with storage and projects from the YEKA mechanism of renewable energy auctions coming online. Investors from the Middle East and China participated in the bidding, he pointed out.

TÜREB’s chief said he expects 2 GW next year and gradual growth to 3.5 GW by 2028 or 2029.

There are 150 manufacturers in Turkish wind industry

There are 150 manufacturers of wind turbine components and accompanying gear in Turkey, covering 65% of the technology. The country reportedly hosts some 380 wind power plants, with more than ten turbines each on average.

The Grand National Assembly is expected to vote soon on legislation aimed at cutting the permitting process by half, to 24 months or less.

Hundreds of megawatts spring up in western provinces

Several big wind farms were inaugurated last month. Atares-2, in the Karacabey district of Bursa in Turkey’s northwest, has 113 MW. It consists of 23 turbines and the investment is worth almost EUR 150 million. CABA, the investor, expects to generate 400 GWh per year.

Eksim expanded its wind power plant in the Geyve district, southeast of Istanbul, in Sakarya province. The original facility had 11 turbines of 52.8 MW in total. The company’s project is for another 14 turbines of 7 MW apiece.

According to Eksim’s website, the combined installed capacity reached 129.8 MW out of 150.8 MW planned overall.

Enerjisa’s Uygar project would at the moment be the second-biggest wind farm in Turkey

Yıldızlar Group and ERN Holding built a 148.8 MW wind farm in Denizgöründü in the Çanakkale district and province. The location is near the Dardanelles Strait, on the country’s Asian side. The companies earlier said the Gülpınar facility would reach 194 MW.

Enerjisa Üretim, which won most of the capacity at the last YEKA auction, launched production at the first part of its 30th power plant. The Uygar wind farm in Balıkesir is set to grow to 250 MW. Currently, it would make it the second-biggest in the country, after Soma.

The Uygar site also spans parts of the neighboring provinces of Manisa, where Soma is located, and Izmir. Its 60 turbines are seen generating 1 TWh per year, according to the project. Enerjisa Üretim is a joint venture between German E.ON and Turkey-based Sabanci.

City of Kayseri builds first municipal wind park in Turkey

In addition, the Kayseri Metropolitan Municipality in central Turkey inaugurated its three wind turbines in Incesu district. They were built to cover the local trams and electric buses, the local authority said.

The municipal transportation firm is operating the 21 MW facility, which will produce 60 GWh per year. It is the first municipal wind farm among 30 largest cities. Kayseri also has its own solar power plants.

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BESS factory of 1.5 GWh per year opening near Sofia in Bulgaria

International Power Supply (IPS), a Bulgarian manufacturer of battery energy storage systems, is about to launch operations at its new facility near Sofia. Its latest model has 8.2 MWh and fits into a standard container. The company plans to double the factory’s annual capacity to 3 GWh already by the end of the year.

IPS, headquartered in Sofia, is automating and scaling its production of battery energy storage systems (BESS). It is counting on growing demand in Europe, including the domestic market. The company already has orders for 7 GWh for the next three years, Chief Executive Officer Alexander Rangelov told the Kapital news website.

The systems in the new X-BESS line have 8.2 MWh in capacity, fitting into a standard TEU container of 20 feet (6.1 meters). Each consists of seven liquid-cooled modules of 1.17 MWh. The model has inverters of 4 MW, translating to a two-hour duration.

Serial production is about to begin in the Hemus high-tech industrial park near Bulgaria’s capital city. Initially, the annual capacity would be 1.5 GWh, but IPS aims to double it already by the end of the year.

IPS plans another, fully robotic factory

X-BESS started three years ago with a 6.5 MWh version. IPS is currently fulfilling contracts for 670 MWh for projects funded through the country’s National Recovery and Resilience Plan (NRRP or, in Bulgarian, PVU). The company also applied for EUR 150 million from the European Union’s Innovation Fund, for a fully robotic 5 GWh factory.

The majority owner of IPS, with 65.5%, is Power Technology Investment Group. It is controlled by the family of the founder Stoil Rangelov Trifonov. SIL Energy Invest has 31.5%. The Capital Investments Fund (CIFund) of the Bulgarian Development Bank holds the remaining 3%.

X-BESS includes a battery management system developed by IPS

The company mainly uses European parts and the lithium-iron-phosphate (LFP) battery cells are from China. The battery management system (BMS) is proprietary. The project pipeline includes a 5 MW rooftop solar power plant for the new factory, combined with own batteries.

IPS is looking for a strategic partner for further expansion.

Just ten days ago, a BESS facility of 124.1 MW – 496.4 MWh was inaugurated in Lovech in Bulgaria. The Ministry of Energy said it is the biggest in the European Union.

Deal with NEK for BESS at Vacha 1 hydroelectric plant

In consortium with GBS Energy Solutions, IPS recently won a tender for equipping the Vacha 1 hydropower plant with BESS. It is a pilot project of state-owned National Electricity Co. (NEK), which has several such investments underway.

The deal is for a system of at least 5 MW in capability and 10 MWh in capacity. The minimum round-trip efficiency is 85%. At 365 cycles per year, the contractors guarantee at least 60 GWh within the duration the 15-year arrangement. They won the job, which includes maintenance, with a bid of EUR 3.4 million.

NEK is also planning another pumped storage hydropower plant at the Vacha dam

Notably, Minister of Energy Zhecho Stankov said last week that NEK sent applications to the European Commission for four pumped storage hydropower projects. Initially, two facilities were planned, at the Batak and Dospat sites. Stankov revealed there would be two systems at Dospat.

The fourth new pumped storage hydroelectric plant is planned near Ravnogor, he said. The village is right next to Vacha 1 and the existing Orphey pumped storage system. The proposed facility would have some 800 MW in capacity, similar to Chaira, according to Stankov. The three existing pumped storage hydropower plants and the sites for the four projects are all in the Rhodope mountains in the south.

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Velimir Gavrilović, Fortis Energy: We are developing huge portfolio in SEE

Fortis Energy is working on renewable energy projects of 2 GW altogether in Southeast Europe. One half of the planned capacity is for solar and wind power plants in Serbia, Chief Operational Officer Velimir Gavrilović said at Belgrade Energy Forum (BEF 2025).

Turkey-based Fortis Energy’s projects Noćaj 1 and Noćaj 2 in Serbia for solar power plants with battery energy storage systems (BESS) is nearing a ready-to-build status. They are part of its 2 GW under development in the region. “We are developing a huge portfolio of different renewable energy sources in whole Southeast Europe. This is predominantly in Serbia,” COO Velimir Gavrilović said at Belgrade Energy Forum (BEF 2025).

He addded that one half is for photovoltaic plants and the other for wind parks in the country. Gavrilović revealed that the company is investing in 600 MW in Albania, mainly photovoltaics, together with endeavors in Bosnia and Herzegovina and North Macedonia.

Fortis Energy is exploring new projects in Spain and Italy as well. It also operates biogas power plants in Turkey and Serbia, Gavrilović noted.

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CBAM’s impact still unclear

Among the challenges for investors in the sector, he pointed to the Carbon Border Adjustment Mechanism (CBAM), the European Union’s CO2 tax. Gavrilović stressed that the exact effect on electricity producers remains to be seen, as well as for the consumers of electricity in industrial production in the region.

Fortis Energy’s COO recalled that investors in renewables in Serbia are obligated to secure energy storage to get grid connection and said there are still some bylaws missing to complete the legal framework.

Grid connection contract signed for 110 MW solar power plant with batteries in Serbia

Earlier this month, the company signed a grid connection contract for its Erdevik solar park in Šid, Serbia, of 110 MW in peak capacity. It is planned to include a BESS facility of 31.2 MWh.

The Turkish developer and engineering, procurement and construction (EPC) operator has three wind power projects in the pipeline in the country: Vranje, Gornjak and Juhor.

Fortis Energy has a 79.9 MW solar power plant in operation in Oslomej in North Macedonia, commissioned last year. The connection capacity is 68.7 MW. In February, the company said it contracted a lithium ion BESS facility to be added, with 62 MW in operating power and a two-hour duration.

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Largest battery storage system in Balkans commissioned in Bulgaria

A BESS facility of 124.1 MW in operating power was inaugurated in Lovech in Bulgaria. Located next to a photovoltaic park within Balkan Industrial Park, it is part of the country’s first closed licensed power distribution system.

The Bulgarian city of Lovech, northeast of Sofia, hosts the strongest battery energy storage system (BESS) in the Balkans. The Ministry of Energy even said the new facility, with a capability of 124.1 MW and 496.4 MWh in capacity, is the biggest in the European Union.

It is located in the local industrial zone, which also features a photovoltaic park of 106.2 MW in peak capacity and an 86.2 MW connection. The energy systems are part of Bulgaria’s first and only closed licensed distribution network.

Balkan Industrial Zone, with the solar power plant and BESS facility, is controlled by brothers Kiril and Georgi Domuschiev. The two entrepreneurs intend to charge the batteries when the price of electricity is low and use them in peak periods.

Developer won subsidy at tender for standalone energy storage systems

The investment in the energy storage facility, worth EUR 75 million, was conducted by Advance Green Energy. Notably, last month, at the RESTORE tender for standalone BESS, the company won a EUR 29.6 million government subsidy for a EUR 45.5 million project.

The construction took only six months. The facility, which is marking a new stage in Bulgaria’s infrastructure development, consists of lithium iron phosphate (LFP) devices in 16 modules.

Lovech Mayor Stratsimir Petkov claimed the BESS is the fifth-biggest in the world. He said it would contribute to the development of the industrial park.

Minister Stankov wants 10 GWh of batteries online by end of next year

At the inauguration, Minister of Energy Zhecho Stankov stressed that the investment is a step toward reaching 10 GWh in operating battery storage capacity by the end of next year. He added it is significant for flexibility, predictability and balancing of the electricity system in Bulgaria.

“The facility, built from 111 battery containers on the territory of Lovech, will help Bulgaria’s energy system remain the most stable in the region. We are the pillar in the Balkans and in Southeastern Europe that balances electricity systems and we have proven this with actions,” the minister stated. BESS guarantee system security and price stability for households and businesses, providing affordable energy, Stankov asserted.

The solar park of two units, operating since May 2023, is one of the biggest in Bulgaria. The investment was worth EUR 51.2 million. The PV system spans almost 72 hectares, while the industrial park has 131.5 hectares.

In another recent update relevant for the future of the country’s energy storage sector, Stankov revealed there is a third pumped storage hydropower project under development. The sites are in the Rhodope mountains.