4.5.1. PV
PV Panels with the lifetime of 25 years are connected to a DC
output. There is no tracking system and the slope and azimuth
angles are assumed to be the average optimum during the years
which are 0 and 159, respectively. These optimum angles have
been calculated by an online calculator in PVGIS (Photovoltaic
Geographical Information System) website [47].