Technical specifications and quality control procedures for reducing the Uncertainty in pv installations: results of the fp7 project pvcrops - Nicolay Tyutyundzhiev; Íñigo de la Parra; MORETON VILLAGRA, RODRIGO; LORENZO PIGUEIRAS, ANTONIO-P.EDUARDO; MARTINEZ MORENO, FRANCISCO; NARVARTE FERNANDEZ, LUIS (Proceedíngs 31st European Photovoltaic Solar Energy Conference And Exhibition, 2015)