In this news release, the share of renewable electricity is expressed as domestic renewable production divided by total domestic consumption. This is in line with the EU Renewable Energy Directive.
This concerns the normalised gross production of electricity, adjusted for weather effects and including indirect electricity generation from green gas. Normalised production in a specific year is calculated as the capacity in this year multiplied by the average production per capacity unit over the previous five years (wind power) or fifteen years (hydropower).
Although total solar generation partly depends on the weather, the EU’s Renewable Energy Directive states that normalisation is not applied to solar power. CBS calculates solar power production by estimating the capacity of solar panels each month and multiplying it by the monthly radiation measured by KNMI and the index for the annual production of solar power per capacity unit, and then dividing this figure by the long-term average for the radiation.