0011-4561 Two methods for modelling of photoelectric conversion in energy analysis of buildings Two methods for modelling of photoelectric conversion in energy analysis of buildings Knera Dominika author Heim Dariusz author Department of Environmental Engineering, Faculty of Process and Environmental Engineering, Lodz University of Technology Correspondence to: Dominika Knera Correspondence to: Dariusz Heim 11 02 2015 Budownictwo Zeszyt 5-B (19) 2014 2014 111 116 Copyright © 2015 2015 <p style="text-align: justify;"> Nowadays, there is a growing interest in using of renewable energy sources, especially solar energy which can be converted into electricity by photovoltaic panels. In addition to traditional stand-alone photovoltaic systems, more and more new or modernized buildings are equipped with integrated photovoltaic systems (BIPV). The main aim of this paper is to compare two models used to calculate amount of electric power generated by photovoltaic panel. Analysed models were implemented into well-known simulation programs, ESP-r and TRNSYS.</p>