photovoltaic systems. payback period. net metering. renewable energy sources support. energy storage. profitability. optimization. standard consumption diagramJaníček, František, 1954- Modified discounted payback period of various small-scale photovoltaic installations / aut. František Janíček, Ján Poničan, Matej Sadloň. -- 2-s2.0-85070327786. -- 000531434400092. Poničan, Ján, 1993-. Sadloň, Matej, 1992- In: Elektroenergetika 2019. -- 586 s.. -- 978-80-553-3324-3 International scientific symposium on electrical power engineering. -- Košice : Technical University of Košice, 2019. -- S. 468-473.