Inverters are electronic devices that convert alternating current (AC) to direct current (DC) and the other way around. This is useful for providing power in places, such as from a battery, where normal AC power does not exist. Inverters are often used to connect devices that require AC power to a DC source. For example, an inverter may be used to connect a laptop computer to a car battery or solar panel. Additionally, in some renewable energy systems, such as wind turbines or solar panels, an inverter is used to convert DC power from the device to AC power for powering household appliances.