RT info:eu-repo/semantics/article T1 Performance of grid-tied PV facilities: a case study based on real data A1 Diez Mediavilla, Montserrat A1 Dieste Velasco, Mª Isabel A1 Rodríguez Amigo, María del Carmen A1 García Calderón, Teófilo A1 Alonso Tristán, Cristina K1 PV facilities K1 Performance K1 Transformerless inverter K1 Isolated inverter K1 Electrical engineering K1 Electrotecnia AB A new procedure is presented to analyse the performance of grid-tied PV facilities. It needs limited amounts of data that are easily sourced and is based on knowledge of the analysed system and its mode of operation. The procedure is applied, in a case study, to compare real PV production at two 100 kWp grid-connected PV installations. Located in the same geographical region, the installation of these two facilities followed the same construction criteria – PV panels, panel support system and wiring – and the facilities were exposed to the same atmospheric temperature and solar radiation. They differ with regard to their inverter technology: one facility uses an inverter with an integrated transformer system and the other uses a transformerless inverter. The results show that the transformerless inverter system performed better than the isolated system by a factor of 1.2%, which, in economic terms, represents more than 2000 €/year PB Elsevier SN 0196-8904 YR 2013 FD 2013-12 LK http://hdl.handle.net/10259/4695 UL http://hdl.handle.net/10259/4695 LA eng NO Spanish Government (Grant ENE2011-27511) and the Department of Culture and Education of the Regional Government of Castilla y León, Spain (Grant BU358A12-2). DS Repositorio Institucional de la Universidad de Burgos RD 24-nov-2024