Status of Solar Heating/Cooling and Solar Buildings - 2023

Status of the Market for Solar Thermal Systems

Market Size and Trends

In Slovakia, the intensity of solar radiation falling on the horizontal surface of the collectors in most areas ranges from 3 to 3.4 kWh/m2 per day, on the basis of which we can classify our country as one of the countries with medium radiation values.

Solar collectors process approximately 50 to 60% of this energy. Each square meter thus accounts for 1.5 to 3 kWh of energy per day, which in practice represents the preparation of 40 to 60 liters of 50 °C hot domestic water. We record the most solar radiation throughout the year in the south of Slovakia and the least in Orava and Kysucie. The most significant differences arise in the summer season, when there is the most significant excess of solar heat gain. The amount of incident solar energy reaches its maximum in July, its minimum at the turn of December and January. However, from the point of view of the utilization of solar energy by solar collectors, the difference between these coldest and warmest regions of Slovakia is only approximately 15%. It can therefore be said that Slovakia has a relatively large potential in terms of the use of solar energy.

Typical Applications and Products




THERMO|SOLAR Žiar ltd., link:

R&D Activities

R&D Infrastructure

Institution Type Research Areas Involvement Website
Slovak University of Technology in Bratislava, Institute of Energy Engineering, Department of Refri University Heat driven cooling machines; Medium-temperature and high-temperature thermosolar collectors; Capturing the facade heat on buildings and transforming it into cold; Yes
University of Žilina, Department of Power Engineering University Solution to reduce the energy intensity of technological processes by using heat recovery from low-potential heat sources; Design of sophisticated heating, heating and ventilation equipment and systems; Research in the area of solar trough collectors; Use of renewable energy sources in their transformation into heat and electricity; Yes

Support Framework

Government Agencies Responsible for Solar Thermal, for Solar Building Activities

Slovak Innovation and Energy Agency, link:

Most Important Public Support Measure(s) for Solar Thermal and for Solar Buildings

Family houses and apartment buildings in Slovakia can apply for support for the installation of small RES installations, including solar thermal collectors. This support scheme is called Green Households (link: Below it is possible to see the results of this support scheme wihtin different years.


Number of Installations

Total installed capacity




6498, 821

8123, 526



6385, 761

7982, 201



5765, 511

7206, 889



5188, 223

6485, 279



2935, 751

3669, 689


19 244

26 774, 067

33 467, 584


Information Resources

National Solar Associations (industry and non-industry)

The Slovak Association of the Pohotovoltaic Industry and RES (SAPI), link:

National Associations on Green/Solar/Sustainable Buildings

Slovak Green Building Council (SKGBC), link: