Support schemes for RES are frequently adjusted by Member States, in order to take account of changing market conditions, such as falling costs for technologies (most significantly in the case of solar photovoltaics, see Figure 5).The levelised cost of photovoltaic electricity in Germany fell from over €400/MWh to €90/MWh in 2014 and is expected to fall further. Different levels of support may be given for different technologies, in order to incentivise technological innovation while reducing support for mature technologies. For example, offshore wind now often receives higher levels of support than more mature onshore wind.
In 2012, RES support was given for 12.6% of the electricity produced, according to a report by the Council of European Energy Regulators based on a survey in 23 European countries. The proportion was highest in Denmark (55.9%) and lowest in Norway (0.1%). The average amount of support was €110.65/MWh. It was highest in the Czech Republic (€194.51/MWh), and lowest in Estonia (€10.56/MWh).
Although the EU has an internal energy market, Member States are not obliged to open their support schemes to renewable energy producers in other Member States. This was confirmed by the Court of Justice of the EU in 2014.