True Sine Wave (pure sine wave) inverters produce a 'pure' and 'clean' AC supply that is very stable and free from surges and spikes. They are often required to power sensitive audio/visual equipment and some flourescent lighting systems. Also, many modern appliances (such as washing machines and microwaves) are fitted with a digital timing mechanism; these devices use the AC frequency as their time baseline and therefore a TSW inverter is generally required.
Due to the true sine wave output, the overall efficiency of the inverter, as well as the device being operated, also tends to be higher. This is mainly because all of the power output can be used, whereas some of the 'square' waveform produced by modified inverters cannot - leading to some of the power being wasted.
Contact us at Cleversolar for help and advice or a look at our Advice & FAQs to find out more about true sine wave inverters.