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+====== PV efficiency ======
+The efficiency of a [[photovoltaic_more|photovoltaic panel]] is defined as follows:
+$\eta = \frac{E^-}{I+}$
+^$\eta$ |Efficiency [%] |
+^$E^-$ |Electricity produced by the PV panel [W/m<sup>2</sup>] |
+^$I^+$ |Solar irradiance [W/m<sup>2</sup>] |
+Next table contains the expected evolution of PV panels efficiency classified by technology.
+^Technology/Efficiency <sup>[[#References|[1]]]</sup> ^2012 ^2020 ^2035-2050 ^
+|**Monocristallin silicon** |14-20% |23% |25% |
+|**Polycristalin silicon** |13-15% |19% |21% |
+|**Amorphous silicon** |6-9% |12% |15 % |
+===== References =====
+[1] [[http://www.strom.ch/uploads/media/AES_DCB_04_Electricite-photovoltaique-solaire-thermique_03-2013.pdf|VSE (2012), Electricité photovoltaïque et solaire thermique.]]