immo!nvest – Die Plattform für Standorte und Immobilien

Category: Energy

  • Underground facility to reduce CO2 emissions

    Underground facility to reduce CO2 emissions

    Flughafen Zürich AG is building an underground energy centre located between multi-storey car park 6, the Radisson Blu Hotel and Operation Center 1. The centre will be equipped with heat pumps and chillers with a total output of 12 to 15 megawatts. In the medium term, it will cover around two thirds of the heating and cooling requirements of the terminal and the surrounding buildings at the airport head. Commissioning is planned for autumn 2027, Flughafen Zürich AG announced in a press release.

    At the same time, the company is exploring an ice-age channel at a depth of 300 metres in order to store thermal energy there and make it usable again. The first well has been in operation since 2024 and a second one is being built. Exploration of the channel is being funded by the Swiss Federal Office of Energy.

    Together with the energy centre and a planned low-temperature network, the channel should save around 6,500 tonnes of CO2 per year in future and help to reduce CO2 emissions at the airport head by 35% to 15,900 tonnes per year by 2030. Flughafen Zürich AG aims to reduce its own CO2 emissions to net zero by 2040.

    “Technically, we are relying on innovative systems with our plan to decarbonise the infrastructure. The combination of heat pumps, seasonal energy storage in an ice-age channel or via geothermal probe fields and a low-temperature network allows us to significantly reduce the climate impact of heating and cooling,” says Guido Hüni, Head of Energy and Decarbonisation at Flughafen Zürich AG.

  • Zurich focusses on the future

    Zurich focusses on the future

    The canton of Zurich looks to the north, or more precisely to Copenhagen, as a pioneering example. The Danish capital has impressively demonstrated that ambitious climate targets can be achieved without compromising on the quality of life. With an 80 per cent reduction in CO2 emissions since 2012, Copenhagen has achieved a remarkable feat. Inspired by this, the canton of Zurich is striving to achieve greenhouse gas neutrality by 2040, or by 2050 at the latest. This target, which will be put to a vote by Zurich’s electorate on 28 September 2025, is a clear commitment to a sustainable climate policy. It is not just a question of defining a target, but of consistently driving forward the effective reduction of CO2 emissions. This is an endeavour that requires determination and innovative strength.

    Success through targeted measures
    Alongside climate protection, the canton of Zurich is investing heavily in the preservation and promotion of biodiversity. Habitats for flora and fauna are being reclaimed through ecological upgrading, renaturalisation and near-natural maintenance. Successful monitoring impressively demonstrates how quickly nature adapts and thrives. One outstanding example is the upgrading of streams as part of the “Diverse Zurich Waters” programme, which led to the rapid reintroduction of dragonflies. The adapted maintenance of embankments along cantonal roads is also having an effect. Life is pulsating there, insects and small animals are once again finding a suitable habitat. These successes prove that the commitment to biodiversity is worthwhile and that nature responds quickly with targeted measures.

    Setting the course for a sustainable future
    The canton of Zurich is setting the course for a sustainable future by revising various laws and introducing new instruments.

    Noise protection ordinance
    The consultation on the revision of the Noise Abatement Ordinance, which is due to come into force on 1 April 2026, runs until 6 October 2025. This is a direct consequence of the amendments to the Environmental Protection Act adopted in September 2024.

    “Core zone plans“GIS map
    A new digital map now provides a comprehensive overview of the legally binding supplementary plans for “core zones” and their elements, based on the PLR-cadastre.

    CO2 Ordinance
    The Federal Council has brought the revised CO2 Ordinance into force with partial retroactive effect from 1 January 2025. It sets reduction targets for greenhouse gas emissions by 2030 and specifies measures for adapting to climate change as well as subsidies for climate-friendly technologies.

    Combating invasive organisms
    The consultation on a revision of the Environmental Protection Act, which is intended to give the cantons more powers in the fight against invasive alien organisms, is open until 13 October 2025.

    Parking regulations
    An amendment to the Planning and Building Act from 1 August 2025 will make it possible to reduce the number of parking spaces in individual cases, provided that there is no relocation to public spaces.

    ÖKOPROFIT
    This tried-and-tested programme successfully helps companies to get started with environmental management in order to reduce costs, optimise resource efficiency and improve their environmental footprint. The canton of Zurich is endeavouring to get other cantons interested in ÖKOPROFIT.

    Listed buildings
    A bill currently undergoing consultation aims to simplify the construction and energy modernisation of listed buildings.

    Deep geological repository
    The general licence applications for the deep geological repository and the fuel element packaging facility, submitted by Nagra, are now publicly accessible after being reviewed and amended.

    Expansion of large-scale hydropower
    A report published by the Federal Council on 13 June 2025 highlights the considerable potential, but also the uncertainties surrounding the renewal and expansion of large-scale hydropower.

    Zurich is ready to take on the challenges of climate change and utilise the opportunities for a more sustainable future. It’s time to act, or as they say in Denmark “Så kom nu i gang!”

  • Where electricity will come from in 2050

    Where electricity will come from in 2050

    For Switzerland to become CO₂-neutral by 2050, transport, heat supply and industry must be largely electrified. Today’s electricity demand of 56 terawatt hours will increase to around 75 TWh by 2050. At the same time, 23 TWh will come from nuclear energy. The necessary reorganisation of the energy system is far-reaching in technical, economic and social terms.

    Massive expansion of renewable energy
    According to the EDGE report, around 60 % of electricity must be covered by new renewable energies by 2050, specifically 45 TWh per year. This would be possible with 28 TWh from photovoltaics, 13 TWh from wind power and 4 TWh from biomass. To achieve this, photovoltaic capacity would have to be quadrupled to 26.8 GW. Wind power would need to be expanded 80-fold to 8.4 GW, especially for winter operation. According to the researchers, this is hardly realisable without strong subsidies.

    Limiting electricity imports makes the system more expensive
    The new Electricity Act limits net electricity imports in winter to 5 TWh. In order to meet this target, an additional 80 % more wind power, 11 % more gas capacity and 10 % more solar capacity would be required. This would increase electricity generation costs by 20 % and electricity prices could more than double.

    Europe remains decisive
    If European electricity trading were to be severely restricted, e.g. through a 70 % reduction in cross-border grid capacities, Switzerland would have to expand wind power by a further 20 %. Supply costs would rise by an additional 8 %. A survey by the EDGE consortium shows the conflicting priorities. 60 % of the population would like to cooperate with Europe, while at the same time 70 % want energy independence and favour domestic energy sources.

    Investments flow abroad
    Another study shows that more than half of the annual investments made by Swiss energy suppliers in large-scale renewable energy projects are channelled mainly to Germany, France and Italy. Only 1 % of these funds are invested in Switzerland. There is a lack of suitable projects or framework conditions in Switzerland. This means that Switzerland is often financing the energy transition indirectly, but not at home.

    Net zero has its price
    The cost of living could rise between 2020 and 2050, for example due to CO₂ taxes, emissions trading or higher production costs. The annual consumption loss of a household could be 0.63-0.75 %, depending on the global climate protection pathway. Without offsetting options abroad, the costs could rise to up to 1%. In the long term, however, this would be more favourable than the consequences of unchecked climate change.

    The energy transition is feasible and challenging
    A CO₂-neutral electricity supply by 2050 is technically possible if photovoltaics and wind power are massively expanded, imports are used intelligently and investments are channelled in a targeted manner. Access to the European electricity market remains crucial. At the same time, we need broad social support and an understanding that inaction will be more expensive than a bold transformation.

  • Swiss PV Circle lays the foundations for the reuse of solar modules

    Swiss PV Circle lays the foundations for the reuse of solar modules

    Around half of the photovoltaic modules that currently end up in the waste stream are basically still functional. Over the past year and a half, the Swiss PV Circle project hastherefore developedpractical tools, technical principles, market analyses and policy recommendations to promote the reuse of PV modules, as detailed in a press release. SENS eRecycling, Swissolar and the Bern University of Applied Sciences are behind the project.

    Policy recommendations focus on financial incentives, such as a reuse contribution similar to existing recycling contributions. In addition, harmonisation options such as a nationwide label and certification system are called for in order to make quality visible and create trust in used modules. According to the press release, harmonised authorisation practices for the handling of used modules throughout Switzerland and systematic data collection during the installation and dismantling of solar systems will reduce further hurdles.

    Practical tools such as a platform prototype with an underlying data model make it possible to assess the appropriate recycling strategy for used modules at an early stage. The project calculated a return of 23,000 to 90,000 tonnes of used photovoltaic modules by 2050.

    The project’s market analysis found that the economic viability of reused modules is still limited due to low new prices. Used modules are currently mainly used in smaller applications. In order to achieve wider acceptance, attractive prices, tested quality and a high residual output of the modules are therefore required.

    The Swiss PV Circle project aims to reduce future waste volumes by increasing the secondary use of modules. To this end, SENS eRecycling, Swissolar and Bern University of Applied Sciences are working together with partners from the Swiss PV industry.

  • AirBattery and CAES as the key to the energy transition

    AirBattery and CAES as the key to the energy transition

    When wind and sun fail, reliable reserves are needed. Conventional battery systems reach their limits with large amounts of energy and long storage times. This is precisely where compressed air storage systems come in. They convert surplus energy into compressed air and store it in underground caverns for days, weeks or even months. When required, the air is expanded again and electricity is generated. The AirBattery and modernised CAES systems represent a turning point in storage technology.

    Innovative combination of compressed air and water
    The AirBattery uses salt caverns to store compressed air at up to 200 bar. The expansion of the air displaces water, which drives a turbine. A closed water circuit ensures high efficiency with low use of resources. Initial pilot projects show efficiencies of 47%, and the first industrial plant is due to be built in Germany in 2027/2028.

    CAESwith over 70% efficiency
    While older CAES systems were 40-55 %, new developments such as those at the North China Electric Power University show that thermal recovery and hybridisation can now achieve up to 70 %. This innovation makes CAES economically attractive for the first time, with electricity generation costs of between €55 and €120/MWh. At the same time, the consumption of raw materials is drastically reduced as no rare metals are required.

    The potential is huge
    In Europe alone, there are many suitable salt caverns with a storage potential of two thirds of annual electricity consumption. In Switzerland, granite formations, old fortresses and strategic cavities offer comparable opportunities. Utilising existing infrastructure makes CAES particularly sustainable and cost-efficient.

    Cost-effectiveness and market potential
    CAES scores with economies of scale and a long service life. Investments are particularly worthwhile for large systems with storage times of over 8 hours. The amortisation period is 6 to 11 years and the ROI can be up to 12 %. By 2030, 10-20% of global storage requirements could be covered by CAES, which corresponds to a market with a capacity of over 100 GW.

    China shows what Europe can learn
    China is demonstrating how targeted political control can advance storage technologies. Clear regulations, state subsidies and green credit lines are massively driving expansion there. A comparable framework is still lacking in Europe. In order to realise the potential, we need funding instruments that are open to all technologies, faster approvals and incentives for grid services.

    Carbon footprint and sustainability
    CAES achieves life cycle emissions of just 20-50 g CO₂/kWh, far below gas-fired power plants and often better than battery systems. Thanks to durable components, low space requirements and resource-saving design, CAES is becoming a building block for a climate-neutral energy future. The combination with power-to-gas or battery systems offers additional flexibility.

    Compressed air storage systems are becoming a strategic success factor
    AirBattery and modern CAES systems could become the backbone of tomorrow’s energy supply. Their ability to efficiently store renewable energy over long periods of time makes them a real alternative, both economically and ecologically. Now is the time for suppliers, municipal utilities and investors to realise pilot projects and create the regulatory conditions. The next few years will decide whether CAES will go from being a niche product to a system component of the energy transition.

  • Europe’s electricity mix is changing

    Europe’s electricity mix is changing

    Germany produced around 40 terawatt hours of solar power between January and June 2025, an increase of 30 per cent compared to the same period last year. France, Belgium, Denmark and Poland also recorded growth in photovoltaics. The expansion is having an impact, but the parallel lull in wind power weighed on the overall balance. At 60.3 TWh, wind power generation was around 18% down on the previous year. As a result, the share of renewable energies in net public electricity generation in Germany fell slightly to 60.9% (2024: 65.1%).

    Europe-wide trend with regional differences
    Within the EU, combined electricity generation from wind and solar fell slightly to 344.4 TWh in the first half of 2025, compared to 358.1 TWh in the previous year. The figures from Fraunhofer ISE show that while solar expansion is bearing fruit in many countries, meteorological fluctuations such as wind lulls are having a greater impact.

    Electricity trading adapts to
    Germany imported 7.7 TWh of electricity in the first half of the year, primarily from Scandinavia, where wind and hydropower continue to offer favourable prices. These imports were more attractively priced than domestic electricity from fossil-fuelled power plants. Exports went to Austria, the Czech Republic and Poland, among others.

    Electricity prices rise slightly – customer prices stable
    After falling in recent years, the average exchange electricity price rose again to €86.64/MWh in the first half of 2025. The highest prices were recorded in January and February, when there was little wind. At an average of 27 cents per kilowatt hour in June, electricity prices for new customers were back at the 2021 level.

    CO2 costs and gas prices on the rise again
    In parallel with the electricity market, CO₂ certificate prices rose by 11 per cent compared to the previous year, and natural gas was also more expensive than in the first half of 2024. These developments illustrate how sensitively the energy market reacts to fluctuations in supply and political conditions and how important a sustainable, resilient energy infrastructure is.

  • Alpine solar plant for Central Switzerland being built in Spiringen

    Alpine solar plant for Central Switzerland being built in Spiringen

    APV Sidenplangg AG, a partner plant of the Uri-based energy service provider energieUri AG from Altdorf and the green electricity producer aventron AG from Münchenstein BL, are building the first alpine solar plant in Central Switzerland, as detailed in a press release. The plant is located in the Sidenplangg area above the village of Spiringen in the Schächental valley in Uri.

    The alpine photovoltaic plant covers an area of 10.7 hectares at an altitude of 1800 to 2000 metres above sea level. The energy is fed into the grid via an existing transformer station. The plant will have an output of 8 megawatts and will generate 12.5 gigawatt hours of renewable solar power per year from 2029. The investment costs amount to CHF 40 million, of which CHF 31 million will remain in the form of contracts for regional companies in the canton of Uri, according to the press release.

    According to the press release, projects under the national Solar Express Initiative are essential for the security and independence of Switzerland’s electricity supply. Switzerland is particularly dependent on the expansion of its winter electricity production. The altitude and production profile make alpine solar plants such as the one in Spiringen particularly suitable for winter electricity production, as they generate three times as much electricity in the winter months as their counterparts in the lowlands.

    “We are delighted to be realising the first alpine solar plant in Central Switzerland together with our partner energieUri. This project underlines the successful cooperation between the Central Plateau and the mountain cantons as well as the joint commitment to renewable Swiss energy production,” said Dominik Baier, Chairman of the Board of Directors of aventron AG.

  • AI-supported platform for dynamic electricity tariffs

    AI-supported platform for dynamic electricity tariffs

    Exnaton and the energy group TotalEnergies Power & Gas Belgium have entered into a partnership. The two companies made this public at the VivaTech trade fair in Paris as part of a joint presentation. As the spin-off of the Swiss Federal Institute of Technology in Zurich, which was founded in 2020, explains in a press release, this cooperation demonstrates how agile energy start-ups can support established utilities in the development of new products and services for the energy transition. Exnaton was part of the start-up accelerator TotalEnergies On last year.

    Exnaton’s billing platform enables energy suppliers to offer dynamic tariffs for renewable electricity. The electricity prices for consumers are based on the current demand for electricity. To do this, Exnaton processes 35,000 data points per customer per year with its artificial intelligence-based software solution and provides current and forecast electricity prices every hour.

    In addition, price signals can be transmitted to intelligent devices such as charging stations for electric vehicles or energy management systems in the household so that energy consumption can be automatically shifted to more favourable time windows. According to Exnaton, the technology helps to “reduce grid bottlenecks as a result of increasing electrification, enables consumers to make tangible savings on their electricity costs and gives energy suppliers the opportunity to further develop their offering in line with the energy transition.”

  • New plant in Dübendorf produces renewable methane

    New plant in Dübendorf produces renewable methane

    Empa has commissioned the move-MEGA methanisation plant in Dübendorf. The project demonstrates the sorption-enhanced methanisation developed by Empa and is intended to improve the power-to-gas process, as detailed in a press release. The plant demonstrates how solar power is converted into hydrogen using electrolysis and then processed into methane by adding CO2. The synthetic methane can be fed directly into the gas grid and replace fossil natural gas.

    According to the press release, sorption-enhanced methanisation is central to the plant. Zeolite pellets absorb the water produced during the reaction and shift the chemical balance in favour of methane formation. As a result, the methane produced can be used directly or fed into the grid. “Thanks to sorption-enhanced methanisation and heat management, we achieve high sales and significantly greater load flexibility than with conventional processes. This makes the technology particularly attractive for direct coupling with photovoltaic or wind power plants,” explains move-MEGA project manager Florian Kiefer.

    The use of CO2 from the ambient air for methanisation enables negative CO2 emissions through methane pyrolysis. The synthetic methane can be broken down into solid carbon and hydrogen downstream. The carbon is used in concrete or asphalt.

    “Methanisation in conjunction with methane pyrolysis opens up a way to combine the supply of renewable energy with the permanent removal of CO2 from the atmosphere,” explains Christian Bach, initiator of the move-MEGA project and head of the Chemical Energy Carriers and Vehicle Systems department at Empa.

    In addition to methanisation, the focus of the move-MEGA project is also on the use of the waste heat generated. The project is supported by the ETH Board, the Canton of Zurich, Glattwerk, Avenergy Suisse, Migros, Lidl Switzerland, Armasuisse and Swisspower.

  • Switzerland is one of the laggards in wind and solar power

    Switzerland is one of the laggards in wind and solar power

    In a new study by the Swiss Energy Foundation (SES), Switzerland ranks at the bottom of the league table for electricity production from solar and wind energy. It produces 681 kilowatt hours of solar power per capita and 19 kilowatt hours of wind power. In total, the country produces 700 kilowatt hours per capita from solar and wind energy, putting it in 22nd place out of 28 EU member states.

    Sweden is the leader in wind power production with 3930 kilowatt hours per capita, followed by Denmark with 3448 kilowatt hours. Even neighbouring Austria comes in at 1004 kilowatt hours. In terms of solar production per capita, the Netherlands leads with 1206 kilowatt hours per capita, followed by Spain and Cyprus. However, even Austria has 941 kilowatt hours and Germany 888 kilowatt hours.

    Switzerland was able to increase its production of electricity from wind and solar from 7.2 per cent to 11 per cent within five years. However, other countries in Europe often achieved higher increases of up to 20 percentage points in the same period. In a European comparison, only Malta, Slovenia, Romania, the Czech Republic, Latvia and, bringing up the rear, Slovakia are behind Switzerland in the production of electricity from wind and solar per capita.

    In the view of the SES, wind energy in particular must be expanded in Switzerland, according to a press release. A total of 11 per cent of domestic electricity consumption is generated by wind and solar, 7.2 percentage points more than five years ago. European neighbours

    The new Electricity Act shows that the Swiss population wants to intensify sustainable electricity production in the future. Political instruments for implementing the law are already active or will be from 2026. Their impact will become apparent in the coming years, according to the SES.

    The exchange of electricity with neighbours also holds great potential for Switzerland. Switzerland is already integrated into the European electricity grid with over 40 cross-border transmission grids. European electricity trading is central to Switzerland’s ability to obtain winter electricity from its European neighbours’ wind turbines, according to the press release. The planned EU electricity agreement forms the basis for increased electricity trading.

  • Solar facade combines energy generation with architecture

    Solar facade combines energy generation with architecture

    Megasol Energie has developed the photovoltaic solution for the Bern 131 project, according to a press release . The 1605 customised modules shimmer blue thanks to the coloured rear glass, which is aligned with the sun. The front glass is transparent. Megasol developed the modules in collaboration with the Bern-based architecture firm Atelier 5, which designed the building.

    Megasol also supplied 468 standardised M450 modules for the roof area. The entire system has an output of 504 kilowatt peak. This will generate around 341,238 kilowatt hours of electricity per year. This corresponds to 88 per cent self-sufficiency for the building.

    Bern 131 at Stauffacherstrasse 131 was built by Atelier 5 as a hybrid of steel and wood. The wood comes 98 per cent from the canton of Bern. The building is SNBS Gold-certified.

    Florian Lünstedt, architect and partner at Atelier 5, praises the collaboration with Megasol. “The façade is not only an important architectural element that characterises the building, but also a functional component for energy generation,” he is quoted as saying in the press release. “The joint development of the PV modules with Megasol has made it possible to combine both aspects at a high level.”

  • Councillors demand right to charging stations in residential buildings

    Councillors demand right to charging stations in residential buildings

    On Wednesday, the Council of States adopted a motion by National Councillor Jürg Grossen by 24 votes to 18. The Federal Council should create binding regulations to ensure access to private charging stations in rented and owner-occupied apartments. The proponents argued that slow charging stations are a key lever for the mobility and energy transition.

    Decarbonization needs infrastructure
    Flavia Wasserfallen emphasized that a lack of charging infrastructure is one of the main reasons for stagnating sales figures for electric vehicles. “Cars need to be charged where they are,” she said. Thierry Burkart also pleaded for a state framework, “combustion engines would never have caught on without charging stations.”

    Property rights versus climate target
    The majority of the Council of States Committee for the Environment, Spatial Planning and Energy opposed a legal obligation. They warned against too much interference in the guarantee of property rights and private autonomy. Daniel Fässler argued that the market should determine where charging infrastructure is created.

    Federal Council’s duty
    The Federal Council had also spoken out against the motion. According to the government, the situation is unclear in the current tenancy and condominium law. Nevertheless, it must now draw up proposals to implement the request.

    Past funding approaches failed
    As part of the last revision of the CO₂ Act, the Federal Council wanted to provide up to CHF 30 million annually for charging infrastructure in apartment buildings and public parking lots. However, this measure failed at the time due to opposition from parliament.

  • World record solar fence realized in Basel

    World record solar fence realized in Basel

    A new safety fence was required as part of the BLT streetcar line route renewal. Instead of a conventional solution, the project focuses on functional added value. A vertically installed solar fence. The combination of safety infrastructure with bifacial photovoltaic modules makes double use of existing areas without additional land consumption, a decisive advantage in urban areas.

    High performance along the rail
    A total of over 400 high-performance bifacial modules will be installed, which can absorb solar radiation on both sides and convert it into electricity. The predicted maximum output is 194 kWp. The integration takes place on a specially developed frame system in basalt gray, which blends harmoniously into the cityscape. This system was developed in cooperation with the company Next2Sun, which specializes in vertical photovoltaic solutions.

    Sustainable energy from the fence
    The project is being implemented in stages. While the first construction phase of the fence has already been completed, the installation of the photovoltaic modules is now beginning. The project is being realized as part of a collaboration between Solarzaun GmbH, BLT and Alpsteinzaun Tor AG. The integration into the existing streetcar renovation construction site enabled smooth implementation.

    Research and prospects
    The project is also being supported by the scientific community. Professor Hartmut Nussbaumer from the ZHAW sees the solar fence as a pioneering model for urban energy solutions. Particularly noteworthy is the energy production at times of day when conventional PV systems, such as those on roofs, work less efficiently. The system therefore complements conventional photovoltaic strategies and improves the seasonal security of supply.

    Model with a signal effect for cities worldwide
    With the world’s longest solar fence, Basel is setting a strong example for the intelligent combination of mobility and energy infrastructure. The project combines technical innovation with urban integration and is expected to serve as a model for similar approaches in other regions. For specialists and managers in urban development, energy planning and infrastructure management, this model offers concrete suggestions for a sustainable future in urban areas.

  • Federal government waives new financial incentives for building refurbishment

    Federal government waives new financial incentives for building refurbishment

    Energy-efficient building renovations do not need to be promoted through further financial incentives in addition to the existing financing options and funding programmes. This is the conclusion of the report on the postulate “Financing options for energy-efficient building renovations” adopted by the Federal Council on 6 June. In a press release, the Federal Council explains that it shows that energy-efficient building renovations do not primarily fail due to a lack of financial resources.

    Instead, the report recommends placing greater emphasis on information and advice, the quality of data on the condition of buildings, the sustainable structuring of mortgages and measures to combat the shortage of skilled labour in order to promote building renovations. In terms of information and advice, the Confederation and cantons are recognised as offering a good range of services. Transparency regarding the energy status of buildings should be improved by the CO2 Act, which has been in force since 2025. In addition, renovation behaviour could be influenced in future by the Climate and Innovation Act, the revised CO2 Act, further developments in cantonal legislation and greater transparency in mortgage lending.

  • Pioneering project: Greenhouse solar system utilises light twice

    Pioneering project: Greenhouse solar system utilises light twice

    The start-up Voltiris from Epalinges has installed its largest solar system to date on a greenhouse belonging to Meier Gemüse AG in Rütihof, according to a press release from the canton of Aargau. The solar system is based on a filter technology in which light waves used to generate electricity are filtered out and redirected to a solar panel, while the light required for photosynthesis can enter the greenhouse unhindered. In this way, plants can be grown without any loss of yield and renewable energy can be generated at the same time. The canton of Aargau subsidised the solar system with CHF 50,000.

    The solar plant in Rütihof covers an area of around one hectare and generates around 234 kilowatts of electricity with around 1,730 solar panels. “As a Swiss startup, we are proud that the first and world’s largest plant with our spectral AGRI-PV system has gone into operation here in the canton of Aargau,” said Dominik Blaser, Chief Product Engineer and co-founder of Voltiris, in the press release.

    Thanks to the filter technology, Voltiris’ photovoltaic modules can be used inside greenhouses without casting shadows, unlike conventional solar systems. The concave arrangement of the filter also concentrates the light, allowing it to hit the photovoltaic module with four times the intensity. In this way, a higher energy yield can be achieved than with conventional solar radiation.

    The solar installation is also in line with the cantonal energy strategy, which aims to achieve the net-zero target by 2050 and strengthen security of supply.

    “This plant is an example of how agriculture and energy production can be combined in a meaningful way,” Markus Dieth, member of the cantonal government and Director of Agriculture, is quoted as saying in the press release.

  • Construction of a solar plant at 2000 metres

    Construction of a solar plant at 2000 metres

    Construction of the Madrisa Solar project by Repower, Elektrizitätswerke des Kantons Zürich(EKZ) and the municipality of Klosters has begun, according to a joint announcement by the partners. A solar plant with a production capacity of 12 megawatts is being built at an altitude of around 2000 metres above Klosters. It is expected to supply around 17 gigawatt hours of electricity per year. Over 40 per cent of this will be generated in winter. The electricity produced will be purchased by EKZ for customers in its own supply area and the Klosters-Madrisa mountain railway.

    After the population of the municipality of Klosters voted in favour of Madrisa Solar in October 2023, the first preparatory work began in autumn 2024. Predominantly regional companies were commissioned with the planning and realisation of Madrisa Solar. Around 15 per cent of the plant should be in operation by the end of 2025. Full commissioning is planned for the end of 2027.

    “After an intensive planning phase and a challenging approval process with many parties involved, we are very pleased with the start,” said Michael Roth, Head of Production & Grid at Repower and member of the Executive Board. Paul Sidler, Head of Renewable Energies at EKZ, describes Madrisa Solar as “a further commitment to a secure and sustainable electricity supply in Switzerland. This complex pioneering project also makes an important contribution to the urgently needed winter electricity.”

  • Profit increase thanks to favorable procurement and fewer reserve requirements

    Profit increase thanks to favorable procurement and fewer reserve requirements

    Stadtwerk Winterthur closed its 2024 financial year above expectations. According to its press release, the reasons for this are the lower market prices for the procurement of gas and lower expenses for the winter reserve prescribed by the federal government. This resulted in a turnover of CHF 311 million and a profit of CHF 26 million.

    There were fewer burst pipes in the water network and the operation of the waste recycling plant was largely uninterrupted. In district heating, significantly less oil and gas had to be purchased to cover consumption peaks. In addition, the number of customers connecting to the heating networks increased. As a result of the financing of the municipal pension fund approved by the Winterthur electorate, previous provisions were released.

    With regard to the challenges in the present and future, the municipal utility cites rising costs for operating resources and external services in all business areas and the increasing shortage of qualified staff. At the same time, the increasing self-production of solar power by private individuals and companies is reportedly a challenge, as this means that they are purchasing less electricity from Stadtwerk Winterthur. In addition, the quantities purchased are more difficult to predict, as they are more dependent on the weather.

    The energy supplier will incur high costs due to the renewal of the waste incineration plant as well as the conversion and expansion projects for the wastewater treatment plant and the heating networks. This will require a large framework credit, which is expected to be voted on at the end of next year. In addition, complex preparations for the legal and financial consolidation of the heating networks are underway. Stadtwerk Winterthur is also increasingly concerned with the costs of environmental regulations and measures to increase energy efficiency.

  • Monument protection and technology in harmony

    Monument protection and technology in harmony

    According to a press release, the Schlieren-based construction company STRABAG AG and its building construction department are taking on “central tasks in the comprehensive renovation of the Landhaus Solothurn”. In addition to measures to modernize the building’s technical infrastructure, including plumbing, ventilation, lighting and stage technology, the focus is on modernizing the heating system.

    This will be converted to resource-saving energy generation by means of a heat pump. Water from the River Aare will be used as a heat source to supply both the Landhaus and adjacent public buildings such as the youth hostel, Kollegium school and municipal theater.

    The location between the old town and the River Aare requires logistical attention. Material deliveries and waste disposal had to take place in the morning so that the riverside promenade could be used as a promenade from midday.

    It was also necessary to take into account the stringent requirements of monument protection. The listed country house is like a “winding architectural work of art with six levels, each with its own renovation requirements”. The approach required “sensitivity” in order to preserve the historical character and the fabric of the building. In particular, the original Solothurn limestone staircases are to be preserved in their uniqueness, it is said. Special protective devices have been created for this purpose.

    Solothurn voters approved the renovation in October 2023. Construction work has been underway since January 2025. Construction is scheduled to end in October 2026. In January, construction site operations will be suspended in consideration of the Solothurn Film Festival 2026.

  • Clean energy from the summer for the winter

    Clean energy from the summer for the winter

    The growing amount of solar power in summer holds enormous potential that has so far remained untapped in the winter months. In the pilot project in Bassersdorf, surplus solar power is converted into methanol using Power-to-X and stored in the compact Hybridbox®. This innovative energy center reliably provides electricity and heat in winter, even when conventional heating systems reach their limits.

    Methanol as the key to a secure energy supply
    “Green methanol allows us to store surplus electricity locally and use it in winter with low emissions, a crucial component for a secure energy supply,” explains Boris Meier from OST. Methanol is liquid, easy to store and climate-friendly, making the Hybridbox® a flexible energy system that adapts intelligently to individual needs. Maximum efficiency is achieved by combining it with photovoltaics, battery storage and a heat pump.

    Emergency power supply and cost control
    The system is also impressive in the event of a power failure. The locally stored methanol guarantees an uninterrupted supply to the building. In addition, the high level of self-sufficiency ensures stable operating costs in the long term, a clear advantage over rising energy prices. Especially in areas without a gas or district heating connection, the system offers a real alternative to old oil or gas heating systems.

    Successful partnership for sustainable building
    The joint project shows how practical cooperation works. “The combination of energy efficiency, security of supply and CO2 reduction makes the Methanol-Hybridbox® a sustainable solution,” says Roger Balmer.

    Bringing sustainability to life
    Buildings are responsible for around a third of CO2 emissions in Switzerland. Reason enough to break new ground. The Bassersdorf project not only provides a convincing technical solution, but also makes the energy cycle tangible for visitors to the new “Sustainable Building” exhibition in the Umwelt Arena. Developers, investors and interested parties can experience how the climate-neutral living of tomorrow can be realized today. A model that can have an impact far beyond Bassersdorf.

  • ProKilowatt 2025 tenders set new standards

    ProKilowatt 2025 tenders set new standards

    The submission phase for projects and programs to increase electricity efficiency in the industrial and service sectors as well as in households has been running since November 2024. With 49 applications submitted by mid-April 2025 alone, interest is around 30 percent higher than in the previous year. A record that underlines the potential for sustainable energy savings.

    Flexibility for companies – paperless and plannable
    The uncomplicated, digital application process and prompt processing within just four weeks make it easier for companies to integrate efficiency projects into their operational planning in a way that fits perfectly. Larger projects with a subsidy of up to six million francs can also be submitted at any time from this year onwards – a milestone for ambitious projects such as the replacement of large production facilities or the bundling of smaller measures.

    Concrete savings
    A project in the retail sector has already been approved for up to six million francs. Replacing existing refrigeration units will save an annual amount of electricity equivalent to the consumption of 4,500 households. Projects in industry also range from the replacement of presses and the optimization of printing machines to more efficient blowers in wastewater treatment plants.

    Competitive tenders as an instrument for the future
    The ProKilowatt program is financed by the Swiss Federal Office of Energy and implemented by CimArk SA in Sion. The subsidy, financed via a surcharge on the high-voltage grids, provides impetus for an energy-saving and competitive economy. The next deadline for project applications is November 2, 2025 – an important date for all companies that want to reduce their energy costs with innovative measures and contribute to the energy transition at the same time.

  • BLKB Fund Management AG launches sustainable property fund

    BLKB Fund Management AG launches sustainable property fund

    BLKB Fund Management AG, the Binningen-based subsidiary of Basellandschaftliche Kantonalbank(BLKB), has launched its first sustainable property fund. According to a press release, the BLKB (CH) Sustainable Property Fund will primarily invest in energy-efficient properties in Northwestern Switzerland and the neighbouring regions of Bern, Central Switzerland and Zurich. It is aimed at qualified investors who wish to invest in a high-quality property portfolio with a predominantly residential focus.

    The initial issue has a volume of up to CHF 160 million. BLKB also intends to invest in the fund. The proceeds of this issue are to be used to acquire a property portfolio with a market value of CHF 177 million. The portfolio, for which BLKB has already acquired seven of the eight properties in the past two years, consists of energy-efficient properties in good locations. It is characterised by a high proportion of residential properties with a low vacancy rate. Currently, 80 per cent of the property assets in the BLKB (CH) Sustainable Property Fund are located in Northwestern Switzerland.

    “The launch of the sustainable property fund with a focus on Northwestern Switzerland is an important milestone. The property sector offers attractive yield opportunities for investors and at the same time has a major impact on energy efficiency, which is particularly relevant for climate neutrality,” Michel Molinari, CEO of BLKB Fund Management AG, is quoted as saying in the press release.

    The subscription period is expected to run from 24 June to 23 July 2025 with payment on 30 July 2025.

  • Geothermal energy in underground structures

    Geothermal energy in underground structures

    Engineers from the Laboratory of Soil Mechanics(LMS) at EPFL have investigated the use of geothermal energy in two very different applications: in a subway station and in an underground data center . In this Innosuisse project, the researchers, together with the internationally active engineering firm Amberg Engineering from the canton of Zurich, focused on optimizing air conditioning through the improved use of energy geostructures.

    These are building components that are located in the ground and can be used for heat conduction. These include energy piles, floor slabs and basement walls. The two studies were published in the journal “Tunnelling and Underground Space Technology”.

    The transferable models developed by the team took into account either most of the physical factors of the underground railroad infrastructure or the capacity to dissipate excess heat through geothermal activation, in addition to the geometry of the building and mechanical ventilation.

    Among other things, the researchers found that a geothermal system in an underground data center pays for itself in three to seven years. If geothermal energy replaces the heat generated by gas boilers, annual CO2 emissions at the typical site in this case study could be reduced by 45 percent.

    Sofie ten Bosch, a civil engineer at LMS and lead author of the study, was able to apply her PhD research to two specific applications in these two studies. She says: “The technology to assess the potential of geothermal energy in a given area is now mature and we see that the industry is ready to explore new opportunities for the optimal use of this sustainable heat source.”

  • sfb course in building automation HF increases efficiency in companies

    sfb course in building automation HF increases efficiency in companies

    Students on the Building Automation HF programme at sfb – Höhere Fachschule für Technologie und Management develop innovative projects for practical application, almost all of which are implemented, according to the press release. This benefits the Swiss economy, for example in the context of the Energy Strategy 2050 or other efficiency improvements. According to the sfb, the programme, which focuses on energy efficiency and building informatics, provides knowledge on how to operate the trades in a complex building as energy-efficiently as possible. 90 per cent of the final theses have a practical relevance, and it is not uncommon for students to make a career leap as a result. This is demonstrated, for example, by alumni Fabian Haist, who has completed further training to become a qualified building automation engineer HF and was available to answer questions for a series of sfb interviews.

    Based on his experience as an electrical planner, Fabian Haist prepared for his next career step with the sfb further training programme. “It played a key role in helping me to reach my current position, as a lot of the content was a perfect fit for my job profile,” he is quoted as saying. As an energy engineer at the Office for Environment and Energy of the Canton of Basel-Stadt (AUE), he is now responsible for implementing the cantonal energy law.

    In his diploma thesis, he planned an energy-related operational optimisation in a Basel school building and further developed the enforcement practice. According to Fabian Haist, the analysis has shown that even simple energy optimisations can lead to considerable savings: Energy savings of 15 per cent and cost savings of 17 per cent had been achieved in the Basel school building. The measures he has defined should now simplify the verification of operational optimisation.

    According to the sfb, the further education programme in building automation takes six semesters to complete, provided that the student has completed relevant vocational training. In addition to building automation, the module content includes data security, digital construction, renewable energies and fire protection. Skills in leadership, communication and teamwork are also taught. Details are available at information events in person and online as well as from a further education counselling service. The next start date is 13 August 2025.

  • New certificate verifies energy efficiency in operation

    New certificate verifies energy efficiency in operation

    The Basel-based Minergie association presented its new Minergie Betrieb certificate in Bern on May 22. It is awarded to property owners who make a contribution to climate protection with low energy consumption and low operating costs, explained Minergie in a press release on the launch. While the existing Minergie building standard certifies structural energy efficiency, Minergie operation is intended to prevent incorrect or inefficient settings in building technology.

    “The new Minergie Operation certificate now bridges the gap between planning, construction and operation by checking and certifying the settings of the building technology and the associated energy consumption based on automatically recorded energy data and evaluations,” Sabine von Stockar, Head of Education and Development at Minergie, is quoted as saying in the press release. “This ensures that the potential for energy efficiency is guaranteed during ongoing operations.”

    For the first time, Minergie operation can be awarded after the building technology has been in operation for at least one year. The certificate is aimed in particular at “property owners with large portfolios and sustainable ambitions”, explains Minergie. In addition to the Minergie building standard, the certification process for Minergie operation can result in energy savings of 15 percent across the entire portfolio. The association recommends recertification after three years.

  • Strategy adjustment brings personnel changes

    Strategy adjustment brings personnel changes

    Jacques Mauron is drawing the consequences of the strategic restructuring of Groupe E and is stepping down as CEO. According to a press release, the Board of Directors has appointed Alain Sapin, Director of Electrical Energy at the Fribourg-based energy supplier, as interim CEO. Mauron has worked for Groupe E since 2004 and has been CEO since November 2019.

    Groupe E announced in April that it was reviewing its photovoltaic and heat pump activities in its own canton and other parts of French-speaking Switzerland. This was the company’s response to a sustained decline in sales in this area since 2023. It now wants to adapt the structure of the Technology and Infrastructure Directorate so that the individual branches are given more independence.

    This strategic reorganization is associated with job cuts. In April, the company was still assuming that 188 of its 2,600 employees would be made redundant. Following consultation with the social partners, the number of redundancies was reduced to 168 in May.

    The previous head of the Technology and Infrastructure Directorate, Michel Beaud, has since left Groupe E. He has now been succeeded on an interim basis by Johann Ruffieux, Head of Procurement and Trading.

  • STRABAG builds utility lines in Arbon

    STRABAG builds utility lines in Arbon

    The Schlieren-based construction company STRABAG AG is building new underground pipes in Arbon, according to a press release. According to the company’s press release, the service lines in Amriswilerstrasse and Egnacherstrasse in Arbon were in a state of serious disrepair. These service lines for water, electricity, gas and the Swisscom data cables are being completely renewed. A new rainwater drain will also be created as part of the work.

    According to STRABAG, the project is characterised by the cooperation between the municipality and the utility company. The construction costs will be borne jointly.

    According to STRABAG, the last renovation of the utility lines was decades ago. Surprises were therefore inevitable during the work. For example, the employees had to uncover power lines by hand. During the process, a mistake would have led to the power being switched off in the entire neighbourhood.

    At the same time, the traffic flow and the interests of neighbours had to be kept in mind. One junction leading to an agricultural machinery park was particularly tricky because there was no way to divert traffic there. However, Ivo Schlappritzi’s team found a solution and a complete closure was avoided without delaying the construction work.

    “Thanks to careful planning and close collaboration with Innoplan Bauingenieure AG, we were able to successfully overcome the challenges on this construction site. Together as a team, we ensured that the new utility lines could be handed over to the municipality of Arbon on schedule in autumn 2025,” said Schlappritzi, STRABAG construction manager for civil engineering and road construction in the Mittelland region.

    Innoplan Bauingenieure AG is an engineering office for structural and civil engineering based in Arbon.

  • New energy centre provides climate-friendly energy

    New energy centre provides climate-friendly energy

    Regionalwerke AG Baden is tackling the expansion of district heating and cooling in Wettingen. RWB’s Terrassenbad energy centre has been successfully producing heat since April last year, the company announced in a press release. The municipality of Wettingen has also granted RWB a licence for the expansion of district heating and cooling along Seminarstrasse in Wettingen. In doing so, the municipality and company want to contribute to the goal of reducing greenhouse gas emissions in Wettingen to net zero by the end of 2025 at the latest.

    The grid construction work is set to begin this summer. Work will begin at the railway station site and Brückenstrasse. RWB plans to connect to the Terrassenbad energy centre by the end of 2026. According to the press release, the company has already acquired several well-known major customers in the area around the Terrassenbad. RWB also plans to set up a district cooling network for efficient building cooling in selected business and commercial areas.

  • Federal government selects five reserve power plants

    Federal government selects five reserve power plants

    Following its meeting on 14 May 2025, the Federal Council will conclude contracts with energy service providers for the operation of five reserve power plants. According to a press release, the Swiss Federal Office of Energy(SFOE) has conducted direct negotiations with potential providers in advance. Following the end of the tendering process in February 2025, the Federal Department of the Environment, Transport, Energy and Communications(DETEC) decided to select five projects with a total capacity of 583 megawatts (MW).

    The selected projects include the reserve power plant Monthey VS with 55 MW from CIMO, the reserve power plant Sisslerfeld 1 in the municipality of Eiken AG with 13 MW from Getec, the reserve power plant Stein AG with 44 MW from Getec, the reserve power plant Sisslerfeld 2 in Eiken AG with 180 MW from Sidewinder and the reserve power plant Auhafen in Muttenz BL with 291 MW from Axpo. All five plants will run on CO2-neutral fuel, according to the press release.

    The five projects should be ready for operation between 2027 and 2030. For the transition, DETEC is currently working on variants using hydropower, emergency power generators and consumption reserves.

  • Electricity agreement with the EU triggers opening of the electricity market

    Electricity agreement with the EU triggers opening of the electricity market

    Switzerland’s planned electricity agreement with the EU also provides for the electricity market to be opened up to end consumers. According to a press release, the Federal Council therefore presented key points for this opening on 14 May.

    The Federal Council’s key points stipulate that end consumers can choose to remain in the basic supply of the local supplier with its regulated prices and can also freely choose their electricity supplier. They are also free to return to the basic supplier, even during the year. Basic suppliers can charge a fee for switching out of or back into the basic supply.

    At the same time, consumer protection measures are to be introduced. For example, a comparison portal will provide an overview of offers. An ombudsman’s office will offer arbitration options. The contracts with the supplying companies must fulfil certain requirements. The Federal Electricity Commission will monitor the market.

    The electricity market has been open in the EU since 2007. A referendum in 2002 failed to open up the Swiss electricity market. Since 2009, the market has been open to large customers with a consumption of at least 100,000 kilowatt hours per year.

  • Solar folding roof technology sets course for the German market

    Solar folding roof technology sets course for the German market

    According to a press release, dhp Technology AG has founded a subsidiary in Stuttgart, Germany. The provider of the “globally unique solar folding roof” is thus emphasising its ambition to drive forward the energy transition with innovative photovoltaic solutions in Germany too, the press release continues. With the establishment of dhp Technology Deutschland GmbH, the company is laying the foundations for a long-term presence in the German market.

    “The expansion into Germany is a logical consequence of the sharp rise in demand for our innovative photovoltaic solution,” said co-founder and CEO Gian Andri Diem. In Germany, the market potential for solar folding roofs is huge, particularly with regard to sewage treatment plants, car parks and logistics areas.

    The branch in Stuttgart is managed by Gian Andri Diem, CEO of dhp Technology, and Torsten Brandstetter as Managing Director. Brandstetter is an industrial engineer with experience in the energy industry and technological innovation.

    dhp Technology is a developer and supplier of solar folding roofs. These are specially designed for installation over sealed surfaces and existing infrastructures. Depending on the weather, they fold up or down automatically. This enables communities and companies to produce electricity locally and sustainably without taking up additional ground space.

    Solar folding roofs from dhp Technology are already in operation at three German sewage treatment plants. A further ten systems are in the implementation phase and are due to be connected to the grid this year, according to the company press release.