Many people are unsure of the differences between a modified or pure sine wave inverter. Think of a modified sine wave inverter as a set of stairs. You will get power in blocks and there will be times when the output is sketchy. A pure sine wave inverter provides power much like the power provided by an electric company. Pure inverters provide smoother and more reliable power waves than a modified inverter. A modified inverter is less expensive and can run smaller items, such as a coffee maker or microwave. However, you may want to consider investing in a pure inverter if you want to run larger items, like a computer or television. Electronics that tend to draw a lot of power should always be run on a sine wave inverter for consistency and safety.