SOLID, TIGI, and EREN Partner for Global Renewable Heat Solutions

Innovative Heat-as-a-Service model will provide clean energy for industry and district heating worldwide as a one-stop-shop.

As announced by the majority owner of SOLID Solar Energy Systems, TIGI, the company has entered into a partnership with the EREN Group, a leading global player in the energy transition. This creates a unique global partnership for the development and application of solutions for the generation and storage of renewable heat from technologies such as solar thermal and heat pumps. In addition, the two companies will create dedicated platforms to develop, finance and operate renewable heat projects through an innovative heat-as-a-service model. This will make clean, up to 100% renewable energy accessible and affordable to industry and heating networks worldwide as a one-stop shop. Up to EUR 40 million will be made available for equity financing of projects, creating a capacity to finance projects worth EUR 100 million. For SOLID Solar Energy Systems, as part of the new platform and with a strong financial partner like EREN behind it, this opens up the opportunity to finance renewable heat projects for commercial, industrial and district heating applications at low(er) cost, which will also benefit customers worldwide. The goal of the new renewable heat platform is to make a significant contribution to the global transition to clean energy.


“Based on our collaboration with TIGI and as part of the partnership with EREN, we can offer our innovative Heat-as-a-Service model to industrial companies and municipal utilities worldwide at even better conditions. Our highly efficient technology solutions, global experience and implementation capabilities in the field of thermal systems are now optimally complemented by the entry of a financially strong partner. Together, we intend to take a leading position in the international renewable thermal energy sector,” said Stephan Jantscher, CEO of SOLID.


The innovative Heat-as-a-Service model
In Heat-as-a-Service models, also known as contracting models, systems are designed and built by a project executing organization and operated by a specially established company that sells the heat to end customers – e.g. industrial companies or municipal utilities. With the globally innovative combination of solar thermal, heat pump and storage, an existing fossil heat supply can be replaced 100% by renewable energy. With this innovative heat-as-a-service model, TIGI, EREN and SOLID will offer everything from a single source: From design and installation, including monitoring, to financing and operation.


The heating sector at the heart of the energy market
The heating sector, which accounts for a large proportion of global energy demand, has become a focal point as the energy market shifts from fossil fuels to renewables. Recent developments, especially in the wake of the war in Ukraine, have led to an increased shift away from fossil fuels.
The collaboration between SOLID and TIGI expands both companies’ global presence and potential customer base during this exciting time of transition. SOLID and TIGI have installed over 300 systems in more than 30 countries, serving a wide range of industries and regions. The partnership with EREN, a pioneer in renewable energy in Europe, creates a combined global partnership with technology leadership, global execution and strong financial resources.


“We believe that large-scale renewable thermal energy presents a considerable global opportunity that was previously underserved but has recently gained momentum. I believe that by joining all three companies’ expertise, technology, and know-how, we set the premise for the next important step of our journey to facilitate the energy transition and a route for further decarbonization.” commented Yonatan Shek, Managing Director of EREN Groupe.


Zvika Klier, CEO of TIGI: “This marks the dawn of a pivotal journey for TIGI. We are excited to join forces with EREN to provide a platform for Heat-as-a-Service projects. This collaboration and the recent announcement with SOLID take us one step closer to being a renewable heat powerhouse, offering end-to-end solutions globally. With a tightly focused international team and projects spanning multiple continents, TIGI is set to make a significant impact on the global transition to clean energy.”


SOLID – Solar Energy Systems is a pioneer in the solar thermal industry with more than 300 successfully installed large-scale solar plants in more than 30 years. Based in Graz, Austria, SOLID – Solar Energy Systems designs and builds national and international large-scale solar projects for the generation of solar heating and cooling as well as process heat for industry. With the planning and construction of large-scale photovoltaic plants, SOLID also became a full-service provider for profitable and ecologically sustainable complete solutions in the areas of heating, cooling and electricity in 2021. SOLID is a global point of contact for research in the field of heating transition and a sponsor of renowned international lighthouse projects. Further information:


About TIGI
TIGI develops renewable heat generation and storage solutions and services, generating savings and reducing environmental impact. It supplies efficient systems that include its own patented and highly efficient solar thermal collectors, industrial heat pumps, smart storage, and cloud services. For more information, please visit


About Eren Groupe
Over the past 20 years, Pâris Mouratoglou, David Corchia and their teams have significantly contributed to the expansion of new and renewable energy sources. They have executed projects with a combined capacity of more than 15 GW through ambitious and successful partnerships forged with major energy companies, notably EDF and TotalEnergies, as well as local businesses and entrepreneurs in over 40 countries. In recent years, EREN has been broadening the scope of its ambitions to become a key player in the energy transition and decarbonization. For more information:


For media inquiries, please contact:

Mag.a Andrea Pavlovec-Meixner

ComCom-Netzwerk für Kommunikation

m.: 0664 264 20 35



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