The speed at which PV cost-matches conventional fossil-generated power will vary significantly across the EU, depending on factors such as the average wholesale price of electricity and the level of solar irradiance.

But rooftop-based systems are broadly on a trajectory to reach DGP by mid-decade in sunny European markets like Italy and Spain, and across the continent by 2019, according to a new report from the European Photovoltaic Industry Association (EPIA).

DGP