The EU has set an ambitious goal of reducing its greenhouse gas emissions by 40 percent by 2030. This will require significant investment in renewable energy sources such as wind and photovoltaics as well as measured policies to deal with the fluctuating capacity offered by these renewables. The integration of national power systems into a single European system would provide huge benefits in smoothing such fluctuations, enabling the EU power market to further increase its reliance on renewables. Current power generators and government regulators will inevitably face challenges adapting to the new market environment, but experience from other countries and regions could provide useful guidance.