About us

SOLID Solar Energy Systems
SOLID Solar Energy Systems (SOLID SES) is a system engineering company that provides customer-centred turnkey and Energy Service Contract solutions for Planning and Operation of large-scale solar thermal energy systems.
SOLID brings together extraordinary knowledge, experience in market application and R&D in areas of planning and operation of large-scale solar thermal energy systems and solar thermal technologies (collectors, long term storages and heat pumps) to the benefit of our customers.
Multiple references for solar heat in industrial processes, solar air conditioning systems and integration into district heating systems were accomplished worldwide. Each of our 300 reference systems enables energy and costs savings for our customers: through the best technological solution, realized with appropriate business model, planned and operated at top quality.
As a system integrator for large-scale solar thermal energy systems, SOLID conveys customer`s needs into real-life success stories and remains its committed partner over decades.
The SOLID team - headquarter Graz
The management team
The sales team
The R&D team
The construction & engineering team, operation & maintenance, IT
The administration team, law
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.
