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What Is the Outdoor Temperature Coefficients of Photovoltaic Systems Connected to the Grid? Comparison of Different Module Technologies in Three Italian Locations
M. Giussani, M. Pichler, M.M. Nikolaeva-Dimitrova
Outdoor Real Operation Condition, Outdoor Gamma TCos, PV Module Technologies
Components for PV Systems
Subtopic: PV Modules
Event: 27th European Photovoltaic Solar Energy Conference and Exhibition
Session: 4BV.2.20
3280 - 3283
ISBN: 3-936338-28-0
Paper DOI: 10.4229/27thEUPVSEC2012-4BV.2.20
0,00 EUR
Document(s): paper


It is well known that the natural seasonal and daily changes in ambient temperature, intensity and spectral distribution of irradiance and the angle of incidence between the sun and the PV array affect the PV module’s behavior. This paper focuses on the investigation of the outdoor temperature coefficient (TCo) of the maximum power (Pmax) (DC values) - here - of various PV technologies with respect to location and season. The chosen locations are Northern Italy (Milano), Southern Italy (Catania) and the Italian Alps (Bolzano). The results demonstrate variations of the power TCo during three seasons – spring, summer and autumn – for four different irradiance levels (300, 500, 700, 900 W/m2). The obtained results show that three groups according to module technologies with a similar behavior can be formed for the three locations. For the plants in Bolzano and Catania the groups are (1) mc-Si, pc-Si and HIT crystalline module technologies, (2) CdTe and CIGS and (3) amorphous silicon technologies. For Milano, the groups are (1) HIT, CdTe and CIS, (2) mc-Si and pc-Si and (3) a-Si modules.