Repowering is the practice of upgrading or replacing key components of aging renewable or thermal power plants with new equipment or technologies. For example, a solar plant can be upgraded with new inverters, significantly improving its performance. A wind farm can be repowered with taller and more efficient wind turbines, which can increase its efficiency and output. A thermal plant can be retrofitted to use natural gas-fired turbines or even small modular nuclear reactors instead of coal-fired boilers, which can extend its useful life and lower its carbon footprint.