In order to operate a device properly and keep it from getting damaged, you must supply the device with the proper level and type of voltage.
Inverters and converters can help you achieve this but it is important to understand the difference between the two. An inverter changes DC voltage into AC voltage and either increases or decreases the power to the appropriate level. A converter changes the voltage level but not the voltage type (DC / AC). As you could determine, an inverter is a bit more complicated since it is changing the type of voltage and the level.