We help communities and companies to reduce CO2 emissions with clean energy.
Summa Energy designs and delivers large-scale renewable energy solutions, including photovoltaic , clean heat and energy storage solutions to utilities, industrial customers and buildings and properties.
Read more about what we do and our contribution to the global fight against climate change.
Summa Energy is a leading provider of large-scale clean energy solutions, for both renewable electricity and heat systems, including photovoltaic, solar thermal, energy storage and smart control technologies. Our international team has extensive know-how and experience in renewable energy for utilities and industrial processes. Our headquarters and heritage are in Finland, and we act globally to ensure the success of our customers, wherever they may be located.

Lolland forsyning’s district heating plant in Søllested is located on the island of Lolland and was the first installation, where Savosolar’s double glazed collectors were used. The double glazing reduces heat losses through the glass side of collector and offers a higher efficiency, especially at higher operation temperature levels and during the darker months of the year. Søllested district heating plant has ca. 500 customers and also uses a 5 MW straw boiler and an oil burner to produce its heat.
The collector field in Søllested has a so-called hybrid field, with both single and double glazed collectors. The single glazed collectors are in the cold end of the collector rows and increase the low temperature as rapidly as possible, while the double glazed collectors are located in the warm side of the collector rows where it is more important to reduce the heat losses.
In Søllested, Savosolar was faced with a special challenge since the customer’s land has a sewerage pipe running through it. Since the owner of the sewer pipe needs to be able to access it in case of maintenance, Savosolar supplied a collector field which both optimised the use of the available land, while still providing access to the sewer pipe

Savosolar has been selected as general contractor to build the largest solar thermal system in Finland to date, on behalf of Suur-Savon Sähkö Oy for its district heating network in Puumala, which supplies households with healthy heating. In this hybrid installation the solar thermal system is producing both, high-temperature heat to district heating supply pipe and also low-temperature heat to improve heat pump plant COP.

A new forerunner project on the large scale solar thermal market in which Savosolar has been involved: The first solar thermal field with double glasses collectors on trackers. This innovation has been done to optimize the annual solar production with a limited available area. This new solar thermal plant is a property of newHeat and will delivered heat the network of the city of Pons, which is managed by Dalkia.
Savosolar supply on this project consist in the complete solar field field as a turnkey solution, it means, the design, the supply and the installation of the solar collectors and its trackers, as well as the piping, until the solar station. It represents 112 Savo 15 DG-M collectors, which will reduce of 210 tons per year the CO2 emissions for the city’s heat needs.
At Summa Energy we help our customers to achieve success in their business and environmental work, while striving for the best possible customer satisfaction. See what Mr Peter Blaser, general manager of Fernwärme Ettenheim GmbH, says about our first delivery to Germany.

Summa Defence Plc is a Finnish defense and security technology group supporting industry growth and strengthening industrial production capacity amid geopolitical change. Summa Defence focuses on dual-use technologies related to security of supply, situational awareness, mobility and defense, which benefit the civilian, security and defense sectors while strengthening comprehensive security, security of supply and crisis management capabilities.
The shares of Summa Defence Plc are listed on the Nasdaq First North Growth Market in Sweden (SUMMAS) and Finland (SUMMA).
Solar heat already makes a global difference. 🌍
Every year, solar heating saves over 40 million tonnes of oil and prevents 140 million tonnes of CO₂ emissions.
Meriaura Energy contributes to this growing impact with large-scale projects across Europe — proving that clean heat is not just the future, it’s already here.
Learn more: summaenergy.com/en/home/
#MeriauraEnergy #IndustrialHeat #Decarbonisation #SustainableIndustry #RenewableHeat #solarthermal #Solarthermalenergy #sustainability #globalimpact #cleanheat #industrialprocessheating #cleaninginplace #greenhouses ... See MoreSee Less
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Solar heat for cities of the future. 🌇
District heating plays a key role in Europe’s clean energy shift — and solar thermal makes it even stronger.
When integrated into low-temperature networks, solar heat provides long-term cost stability, low emissions, and local energy independence.
It’s scalable, sustainable, and ready today. ☀
Learn more: summaenergy.com/en/home/
#MeriauraEnergy #IndustrialHeat #Decarbonisation #SustainableIndustry #RenewableHeat #solarthermal #Solarthermalenergy #sustainability #globalimpact #cleanheat #industrialprocessheating #cleaninginplace ... See MoreSee Less
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Sustainable food starts with sustainable heat. 🌱
Modern greenhouses face rising energy costs and growing sustainability demands.
By switching to solar thermal heating, operators can maintain ideal growing conditions while cutting carbon emissions — supporting cleaner, more resilient food production for the future. 🌍
Learn more: summaenergy.com/en/home/customers/greenhouses/
#meriauraenergy #IndustrialHeat #Decarbonisation #SustainableIndustry #RenewableHeat #solarthermal #solarthermalenergy #sustainability #GlobalImpact #cleanheat #industrialprocessheating #cleaninginplace #greenhouses ... See MoreSee Less
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