To reach climate goals it is important to give detailed insight into the current state of renewable energy. In this research we present an approach for estimating the generated solar energy of a country on a daily and regional basis. We combine measurement data from two ‘new’ data sources. The first one is pvoutput, an international on-line portal with data on yields of solar panels. The second data source is modelled irradiance data derived from international satellite data. In this research we use these data sources to estimate more detailed national and regional solar energy yields.