Abstract
Predicting both PV module and generator performances under natural
sunlight is a key issue for designers and installers. Five simple
algebraic methods addressed to predict this behaviour in Mediterranean
climates have been empirically validated. Firstly, the calibration
in STC of all significant electrical parameters of both a monocrystalline
and a polycrystalline silicon PV modules was entrusted to an accredited
independent laboratory. Then, a 12-month test and measurement campaign
carried out on these modules in the city of JaeÂ?n (Spain, latitude
38 N, longitude 3 W) has provided the necessary experimental data.
Results show that (a) crystalline silicon PV module outdoors performance
may be described with sufficient accuracy â for PV engineering
purposes â only taking into account incident global irradiance,
cell temperature, and using any one of two simple algebraic methods
tried in this paper and (b) regardless the used method, poor results
may be achieved if the PV specimens under study are not electrically
characterised in STC prior to analysing their outdoors performance.
Even so, the methods recommended in (a) perform best.
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