Generators with an installed capacity of less than 50 MW using co-generation systems or renewable resource systems (biomass, wind, mini-hydroelectric or photovoltaic solar), or any type of biofuel or non-renewable waste have the right to sell the electricity they generate or their surpluses to the grid at a pre-set price, the value of which is the market price plus a premium according to the type of plant. The premiums are established and decreased on a yearly basis in order to maintain market competition. IEA/IRENA Global Renewable Energy Policies and Measures Database © OECD/IEA and IRENA, [November 2020]