SOLID – the innovative solution for heat and cold
We at SOLID constantly strive for the customer’s best option to use solar thermal energy. We draw on over 25 years of experience and a team of highly-qualified employees offering customer-tailored solutions. With the know-how and success of having realized over 300 solar systems worldwide constantly pursuing improvement and innovation.
Our Products
Success Stories












Franziskus Hospital Harderberg
SOLID Products
- Solar Cooling
- Solar Hot Water & Heating
- Solar District Heating







PepsiCo Gatorade

Harvard University

District Heating Central, Graz

Solar cooling and hot water for the Olympics 2008
Solar Hot Water & Heating for municipal swimming facility in Banja Luka
In Banja Luka, a new municipal swimming pool was built in 2009. Through the city partnership between the city of Banja Luka and the city of Graz, SOLID was offered the opportunity to plan and install a large-scale solar plant together with Solar Graz, a subsidiary of Energie Graz.

Did you know?
Back in 2013 we commissioned the solar cooling system that provides cooling for over 4000 pupils.
Click here to learn more.We have competences and expertiese in planning and commissioning system solutions worldwide. And we train local partner, because we believe sharing makes the world a better place.
Click here to learn more.Research affects innovation. Innovation is the key to success. Research is our passion. Wordwide, we have international research partners to find better solutions.
A project for SOLID does not end with commissioning. SOLID accompanies its customers throughout the entire life cycle of the plant.
To find your best solution we think and act outside the box.
Click here to learn more.This leads to increased attraction to young people.
We are very thankful for this continuous partnership and hope for many more years.