Ameren plans to achieve the above goal by investing $4.5 billion by 2030, including investing in the Atchison and High Prairie renewable energy centers, which will add 3,100 MW of solar and wind power generation to its portfolio. In addition to making acquisitions and setting up new clean energy-based power projects, it is shutting down coal-fired electricity generating units. Ameren aims to retire 75% of coal-based generation units by 2039 and retire all coal-based units by 2042.