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Here you can see the potential production of PV panels mounted in such a way that the orientation of the surface is parallel to the latitude
and has a fixed slope equivalent to the latitude towards the sun. The output is calculated from data of the European Centre for Medium Range Weather Forecast
(ECMWF) and additional data from the National Centre for Environmental Prediction (NCEP). (The panels are considered to have an efficiency of 14 % at peak
radiation and standard temperature reduced to approx. 13 % efficiency due to system losses.)
The best conditions are found in arid zones of high
mountainous regions. Here the potentíal production is more than twice as high as we can expect in middle European countries.
In Poland the production
of a photovoltaic system will lie in the range of 130 kWh / (m² a) or approx. 900 Full Load Hours (FLH).