The Hungarian State Treasury is a central budgetary body with independent legal personality, national competence, independent operation and management, which is under the professional, legal and budgetary management of the minister responsible for public finances. The main areas of activity of the Hungarian State Treasury are: implementation of the budget, financial services, central salary accounting, tender grants, debt management, compliance audit in the municipal subsystem of the general government, keeping of registers and other records. The aim of the project is to set up solar systems in certain buildings of the Hungarian State Treasury, which would significantly reduce the amount of electricity purchased. The development will contribute to increasing the use of renewable energy sources and reducing greenhouse gas emissions, as well as to achieving the objectives of KEHOP Priority 5 Action 2, which can be worded as follows: Energy efficiency modernisation of buildings by combining the use of renewable energy sources. The priority objective of the call for proposals is to encourage the uptake of decentralised building-related environmentally friendly photovoltaic systems, thus supporting the full or partial replacement of existing fossil-based electricity use by central budgetary bodies with renewable energy sources. Our tender meets the goal set to the maximum. There will be a total of 8 implementation sites in the project: 1115 Budapest, Bartók Béla út 120-122. Hrsz: 3501 (192 solar panels). A solar panel system is installed on the roof of the building with weighted plastic tubs, bituminous base plates, aluminum rails and clamps. 1095 Budapest, Soroksári út 22-24. 37923 (201 solar panels). A solar panel system is installed on the roof of the building with weighted plastic tubs, bituminous base plates, aluminum rails and clamps. 1139 Budapest, Váci út 71. hrsz: 27815/7 (192 solar panels). A solar panel system is installed on the roof of the building with weighted plastic tubs, bituminous base plates, aluminum rails and clamps. 1054 Budapest Vadász utca 16. hrsz: 24787 (123 solar panels). A solar panel system is installed on the roof of the building with the help of aluminium and stainless steel components made according to type designs. 7633 Pécs, Szigeti út 33/A. hrsz: 336/2 (144 solar panels). A solar panel system is installed on the roof of the building with weighted plastic tubs, bituminous base plates, aluminum rails and clamps. 7100 Szekszárd, Augusz Imre u. 7. 1921/2 (164 solar panels). A solar panel system is installed on the roof of the building with weighted plastic tubs, bituminous base plates, aluminum rails and clamps. 5000 Szolnok, Liget u. 6. 3972 (192 solar panels). A solar panel system is installed on the roof of the building with the help of aluminium and stainless steel components made according to type designs. 2800 Tatabánya, Komáromi street. 11050/1 (192 solar panels). A solar panel system is installed on the roof of the building with the help of aluminium and stainless steel components made according to type designs. Based on the size and method of connection of the systems to be installed, they are considered to be small power plants of a household size, which are not required by a building permit. In the joint statement of the energy expert attached to the tender as an annex to the tender, it is stated in the joint statement of the applicant and the applicant that, on the basis of the preliminary calculations, the investment would result in gross annual cost savings of HUF 13 099 521. As a result of cost savings, we would be able to make other improvements in the long term.