The LCA of the selected PV systems resulted in the compilation of a comprehensive list of burdens and impacts which were assessed according to a priority ranking system. The criteria for selection were defined by using the damage function approach applied within all ExternE studies which assesses impacts step by by step the incremental effects starting from burdens resulting from each life cycle stage to the marginal physical impacts to human health and the environment through to the estimation of the marginal monetary values placed on these impacts. The calculations of the environmental impacts are based on data from individual PV installations in real locations rather than using estimates based on data from national damages.