Inverters can be used in a number of applications. The use can vary from small applications in a personal computer to large industrial complexes which require bulk power. An inverter is basically a logic gate that converts input into output and both of them are in opposite state. It implies that if input is false then output is true and vice-versa.
Inverters ensure an uninterrupted power supply. They can vary in size according to their capacity. Inverters can have one-switched as well as two-switched modes of power supply.
A simple inverter consists of an oscillator. This oscillator drives a transistor. The result is interruption of the direct current which is incoming, creating a square wave which passes through a transformer to produce the output. The more advanced inverters have started using thyristors and other forms of advanced transistors.
An inverter has several other parts, such as capacitors and inductors. They ensure the smooth and uninterrupted supply of current from the inverter. The best way to judge the quality of an inverter is to look at its pulse rating. A 3-pulse implies that the inverter is using three transistors. It is a relatively simple arrangement.
Inverters offer a cleaner output than many generators. That is why they are preferred as a source of power, especially in those areas which are environmentally sensitive. Though the quality of power supplied by simple inverters may not be that good, there are other, more advanced inverters which do not give you such problems.
There are companies which make customized inverters available on demand. Before you buy one, find about the maintenance costs and the effort that is necessary to maintain it. Some of the inverters might not be that expensive, but their maintenance is.