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Building resilient cities: how to align competitiveness and sustainability in Europe’s energy transition?

By Filipe Araùjo, Deputy Mayor of Porto, Portugal and Vice President of Energy Cities,one of EUSEW partner organisations

With the new EU Institutions taking office, it seems that the main discourse has shifted from the EU Green Deal to competitiveness. This new narrative presents both a challenge and an opportunity for European cities. We want our territories to prosper, but this can’t happen at the expenses of our health and safety.

Resilient local economies for a competitive Europe

A city that is thriving is a place where there is community wealth: the needs of its inhabitants are met, preferably by local economic actors. This contributes to reinforcing the local economic system, the social bonds and overall help withstand crisis situations. Resilient local economies are a precondition to EU’s competitiveness.

This community wealth approach applies to many sectors, but I believe it’s quite effective when it comes to energy. Nowadays, very few are questioning the need to have more renewable energy fed into the grid, not only to fight climate change, but also to ensure everyone (businesses and citizens alike) has access to energy at a relatively stable and affordable price, no matter the geopolitical context. But if we want to speed up RES deployments, we need to ensure everyone is on board. Not in my backyard behaviours (NIMBY) are still a reality many local leaders are confronted with. According to our experience in Porto, local ownership of renewable energy is a way for cities to address NIMBY, but also to help tackling energy poverty and contribute to thriving local economies.

Community energy addressing energy poverty in Porto

That is why Porto is planning to include all municipal social housing, around 12% of buildings in the municipality, in community energy projects. 6MW of solar power is going to be installed, providing clean electricity to vulnerable families at a lower price.

While some of the projects are still being tendered, some are already in the implementation phase. For example, the energy community in the Agra do Amial district, active since May 2024, is already providing its members with renewable energy, with around 50% of the energy generated consumed by vulnerable families

While our ambition is high, we can’t ignore the many challenges we are confronted with – some are common to many European municipalities. Cities frequently lack staff and financial resources to lead highly participatory process, often involving citizens who are very difficult to engage (such as vulnerable households) or even to provide information to their community on energy related issues. This, combined with the complexity of such topics, makes our work even more difficult.

In addition, burdensome administrative processes and challenging legal frameworks at national level can halt innovative projects and discourage citizens and small businesses from participating. When setting up Porto’s first energy community, it took us 2 years to get social housing units connected to the solar panels we installed.

Leveraging on local ecosystems for a more resilient Europe

Luckily, solutions do exist to ensure local communities can play their part to contribute to a more resilient and democratic Europe. Aside from ensuring legislation is properly transposed so that everyone across Europe can benefit from the same energy rights, we need capacity building programmes, develop local One Stop Shops to inform/engage citizens on the opportunities available to them and energy literacy programs.

For this to happen, cities will have to access finance, and the integration among the different initiatives at all levels that aim at increasing renewable energy deployment (and energy security) is fundamental. Another important aspect will be to ensure multilevel governance, so that cities can participate in the decision making around what concerns them, and not just been asked to implement.

In the coming period, the new European Commission is set to work on a new Citizens Energy Package, but also to develop a Clean Industrial Deal and reform the EU Cohesion Policy. This presents as a unique opportunity to align the EU approach to competitiveness with its energy and environmental targets, by establishing proper governance mechanisms and funnelling the necessary resources accordingly.

This opinion editorial is produced in co-operation with the European Sustainable Energy Week (EUSEW) 2025. See ec.europa.eu/eusew for open calls.

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Heliup wins European Solar Startup Award 2025 with solar panels 60% lighter than conventional ones

France-based Heliup has been awarded the Gold European Solar Startup Award 2025 for its Stykon solar PV panels for flat rooftops.

Following a successful online pitch, Heliup, Aevy and suena were nominated by the expert panel as finalists.

Yannick Veschetti, President and Co-founder of Heliup, Gautier Moulin, Co-founder and Chief Operating Officer of Aevy, and Felix Heimke, Senior Product Manager at suena, presented their work on stage at the SolarPower Summit 2025.

Yannick Veschetti stressed there is over four billion square meters of available large rooftop space in the European Union. Heliup wants to harness the potential of this available rooftop space and fast-track solar installations across Europe, he added.

Veschetti: The startup is committed to revolutionizing solar energy with lightweight solutions manufactured in Europe

The startup is committed to revolutionizing solar energy with lightweight solutions manufactured in Europe that unlock the potential of commercial and industrial rooftops, Veschetti pointed out.

According to the startup, solar panels have considerable weight which, combined with around 15 kilograms per square meter for the fixing structures, is not compatible with a large proportion of existing building roofs.

To address the issue, Heliup uses a patented CEA technology developed for over three years at France-based Institut National de l’Energie Solaire (INES).

The unique technology is based on the conservation of thin glass and on an innovative installation concept, the startup said.

The solar panel is 60% lighter than conventional panels

The Stykon range is intended for flat roofs, with an innovative, simple and quick installation system based on gluing the panel directly onto the roof’s waterproofing membrane. It is 60% lighter than conventional panels while maintaining the same level of performance and durability, Heliup added.

SolarPower Europe explained that Heliup’s panels are lightweight, at five kilos per square meter. They have an efficiency of 20% and are resistant to extreme weather conditions. The equipment is made in Europe and has an easy and fast installation process, the organization said.

“Only with these forward-thinking innovators can we strengthen Europe’s competitiveness and guarantee a swift energy transition,” SolarPower Europe CEO Walburga Hemetsberger stated.

The award jury panel comprised Jenny Chase, Solar Analyst at BloombergNEF; Stefan Müeller, Co-Founder, Shareholder and Board Member at Enerparc AG; Felix Krause, Managing Partner at Vireo Ventures; and Michael Schmela, Director of Market Intelligence at SolarPower Europe.

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Renewables equipment factory to contribute to just transition of coal region in Romania

Monsson Group is preparing to build a manufacturing facility in Petrila for renewable energy equipment, including robots that clean solar panels. The project received funding to contribute to the just transition of Romania’s coal region Jiu valley – Hunedoara.

An investment of nearly EUR 10 million in the first phase is underway in Transylvania, in the town of Petrila, economically devastated after the closure of a coal mine. The project is aimed at reviving the area with a factory for renewable energy equipment such as enclosures for battery energy storage systems, wiring and robots that clean photovoltaic panels.

Monsson Group revealed its facility would also manufacture gear for monitoring environmental parameters and tracking fauna in the area. The Sweden-based company has said 70% of the investment would be covered from Romania’s Just Transition Program which is in turn part of the European Union’s Just Transition Facility.

Romania is planning to prolong the operation of its coal power plants and mines for a smoother switch to renewable sources, in terms of electricity supply. However, such facilities are becoming less financially viable by the day all across the EU. Coal regions are facing economic blows from early shutdowns of power plants and mines.

First major private investment in Petrila

According to Monsson, the new factory would employ more than fifty people in the first phase. It expects to begin construction mid-year.

It is the first major private investment in Petrila, Mayor Vasile Jurca said. He said the project enables reskilling and sustainable development. The local authority provided the land for the factory. Romania has earmarked substantial funding for the construction of renewable energy equipment plants.

The second part of the plan is to install a 20 MWh battery energy storage system to provide system services to the national grid, followed by a 50 MWh unit.

Reskilling program underway

The group, which includes Wind Power Energy and its RenewAcad network of renewable energy training centers, established cooperation with the University of Petroșani in getting skilled workers. Monsson is one of the biggest renewable energy investors in the country.

Petrila is part of the Jiu Valley in Hunedoara county, Romania’s main coal region. It is located near Oltenia, the other coal complex, in the counties of Gorj and Dolj.

Notably, the Maritsa East 3 coal power plant in neighboring Bulgaria ceased operations yesterday again after it was briefly brought back online to maintain energy security.

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Montenegro’s TSO CGES achieves EUR 25 million profit in 2024

Montenegro’s transmission system operator CGES recorded a profit of EUR 24.8 million last year.

The net income of TSO CGES compares to EUR 35.7 million from 2023. In 2022, the company’s profit amounted to EUR 20.3 million, after EUR 16.9 million in the previous year.

President of the Board of Directors of CGES Aleksandar Mijušković noted in a statement to Mina news agency that the total since his appointment is almost EUR 100 million.

He recalled that the company’s operations are regulated by the Energy and Water Regulatory Agency of Montenegro (REGAGEN), pointing out that the profit is subject to revision, in line with the regulatory mechanism.

Implementation of visionary projects led to income growth

Implementation of crucial infrastructure projects, investments in new technologies, and improvement of work processes were the decisive factors for the success, Mijušković underlined.

In his words, conducting important, visionary projects has led to a significant increase in income from electricity transit. In addition, by applying new technologies and improving work processes, the company achieved a more efficient and reliable system with the lowest grid loss rate so far, despite a much higher transit and flow of energy through the system, Mijušković pointed out.

He added that good business results secure multiple benefits for shareholders and users of the transmission system in Montenegro. CGES’s results have contributed to lowering the transmission tariff paid by citizens and businesses, Mijušković said.

The company plans to continue the investments within its five-year plan, worth EUR 207 million. It envisages significant infrastructure projects.

The Trans-Balkan Corridor will facilitate market coupling with Europe

He singled out the Trans-Balkan Corridor among the largest infrastructure projects. Its completion will significantly increase the capacity for power transit from the Balkans to Italy.

It will enable coupling the Montenegrin electricity market with the Italian one and, with it, the single European electricity market, Mijušković said.

The green transition brought great challenges for the European power system, he stressed. The production of electricity from renewable sources cannot be controlled, so large, uncontrolled electricity flows began appearing in the system, threatening its stability, Mijušković said.

The issues can be effectively solved only by strengthening the internal grid and interconnections with neighbors, which CGES has envisaged in its plans, he asserted.

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Greek companies expand to Bulgaria with solar power investments

Greece’s government-controlled power utility PPC and Masdar’s subsidiary Terna Energy are separately building two photovoltaic plants in Bulgaria, worth an estimated EUR 190 million in total.

The biggest two renewable energy companies in Greece have taken over one major project each in neighboring Bulgaria, where domestic investors dominated the photovoltaics market until recently. Soon after government-controlled Public Power Corp. (PPC) said it began building a 165 MW solar power plant with batteries, Capital reported that Terna Energy plans to complete a 130 MW project by the end of next year.

The segment appears saturated, given the lack of energy storage capacities in Bulgaria to balance high PV output at times of abundant sunshine. Permits that the Sustainable Energy Development Agency (SEDA) issued show 4 GW in overall installed solar power capacity. Nevertheless, Executive Director of Electricity System Operator (ESO) Angelin Tsachev estimated there is as much as 5 GW, the media outlet noted.

In its annual statistics update, the International Renewable Energy Agency (IRENA) said Bulgaria hosted 3.9 GW of PV capacity at the end of 2024.

Terna Energy bought out initial developer one year ago

Terna Energy became a subsidiary of Abu Dhabi Future Energy Co. (Masdar) last year. The Greek company entered the ownership of the project firm Bio PD Solar Energy for the 130 MW facility three years ago with a 25% stake.

In mid-2024, Terna Energy Overseas Ltd., registered in Cyprus, became the sole owner. It invested some EUR 25 million and bought out Helios Construction Project. According to the article, the previous parent company is associated with businessman Ahmed Dogan. He was the founder and long-time leader of the Movement for Rights and Freedoms party, representing Muslim minorities.

Both projects are on municipal land

The project spanning more than 200 hectares was initially planned at 180 MW. The lot is on municipal land in Kameno in eastern Bulgaria.

According to the news website, the investment amounts to EUR 92 million. The location near the village of Vratitsa isn’t subject to an environmental impact assessment study except for the intended construction of a 33/110 kV substation.

Terna Energy said its former affiliate Terna, part of the GEK Terna conglomerate, is building the solar power plant in Burgas province.

New hybrid power plant in Bulgaria is part of PPC’s regional expansion

PPC is building its PV plant in the Chirpan municipality in Stara Zagora province. Having included a battery energy storage system in the project, and given the power links with its assets in Romania and Greece, the company is counting on a strategic advantage in the market with the new hybrid facility. PPC is pursuing major expansion in the region, including Italy.

The investment is valued at EUR 97 million, of which the energy storage segment accounts for EUR 10.2 million to EUR 12.8 million, the article adds.

The Colosseum site consists of 11 municipal properties formerly designated as agricultural land, on 200 hectares altogether. PPC bought the project from Enery. The company is headquartered in Austria and active in the renewables sector in Romania as well.

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Germany looks into underground heat storage to decarbonize heating

Germany is increasingly looking into geothermal energy storage as a way of decarbonizing its heating sector. The technology allows storing heated water in underground caverns and using it for warming homes and public and private buildings during winter, according to a report by Clean Energy Wire.

This thermal energy storage system, called Geotes, promises “the almost universal availability of cheap and practically inexhaustible storage capacities,” according to Peter Ruschhaupt from the think tank Future Cleantech Architects (FCA), German business daily Handelsblatt reported.

The process involves heating water and injecting it into underground caverns, where heat can be retained for months by the surrounding rock. The warm water can then be pumped back to the surface and used for district heating.

Heat can be retained underground for months

The cost of drilling is the main challenge in ensuring that the process is economically viable, but once the caverns are ready, the technology can be very cost effective, as heat can be stored for an entire season, according to Ruschhaupt.

Such systems already exist in northern Europe

One such research project is currently underway in former coal mines in Germany’s Ruhr valley, the daily wrote. In the Netherlands and Scandinavia, “there are already thousands of Geotes systems,” said Ruschhaupt.

According to the German geothermal association, geothermal energy could cover 40% of the country’s heating needs, Clean Energy Wire wrote, noting that Germany is seeking to phase out fossil-run heating boilers and requiring cities to prepare municipal heat plans by mid-2028 at the latest.

In Serbia, the district heating company in Novi Sad is developing a thermal energy storage project, as part of an innovative hybrid system that would combine solar collectors, seasonal thermal storage, and heat pumps. The investment is aimed at decarbonizing the Serbian city’s district heating and helping balance the power system.