https://czasopisma.uwm.edu.pl/index.php/oej/issue/feed 2026-09-10T13:22:53+00:00 dr hab. Marian Oliński, prof. UWM oej@uwm.edu.pl Open Journal Systems <p>"Olsztyn Economic Journal" is a scientific journal, published in English by the Faculty of Economic Sciences of the University of Warmia and Mazury in Olsztyn. It publishes scientific papers of methodical, review and empirical nature in the field of social sciences (discipline economics and finance, as well as management and quality studies). The first issue of the journal was published in 2006. From 2007 to 2012 the journal was published semi-annually and from 2013 to 2020 was published quarterly. From 2021 the journal is again published semi-annually. The electronic edition is the primary version of the Journal. <a href="https://czasopisma.uwm.edu.pl/index.php/oej/about">(more)</a></p> https://czasopisma.uwm.edu.pl/index.php/oej/article/view/12456 2026-03-04T11:32:54+00:00 Natalia Świdyńska natalia.swidynska@uwm.edu.pl Weronika Jarzębowska weronika.jarzebowska@student.uwm.edu.pl

<p>The aim of the study was to assess the profitability of investing in a micro photovoltaic installation in a household that benefited from funding under the government’s “My Electricity” programme. Methods for assessing the profitability of investment projects were used. The net present value (NPV) and the payback period (DPP) were calculated. The payback period is longer than that declared in the agreement between the investor and the company responsible for the installation and calculation of the profitability of the photovoltaic panels. The subsidy received under the government’s “My Electricity” programme significantly shortened the payback period. The payback period declared in the agreement between the investor and the company involved in the installation and calculation of the profitability of photovoltaic panels is underestimated. Companies involved in the installation and calculation of the profitability of photovoltaic panels reduce the payback period for investors’ expenditure on the installation of photovoltaic panels. Government support programmes may contribute to an increase in interest in investments in renewable energy sources (RES) among households.</p>

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