“Coal-fired power stations are not necessarily a barrier to the expansion of renewable energy”
Old coal-fired power plants can be made more flexible at reasonable expense, allowing countries with a high share of coal-based electricity to make a smooth transition to a climate-friendly energy system, according to a new study by think tank Agora Energiewende.* Minor modifications allowed coal-fired power stations, for example in Germany and Denmark, to increase and decrease their outputs in quarter-hourly intervals, making them more flexible to the fluctuating output of wind and solar power facilities.
Also see the CLEW factsheet When will Germany finally ditch coal?
*Like the Clean Energy Wire, Agora Energiewende is a project funded by Stiftung Mercator and the European Climate Foundation.