The type of power inverter you must select depends on the kind of power output you need. Pure sine wave inverters supply an output which follows a sine wave harmonically. This resembles utility-supplied grid power. These inverters switch polarity polarity changes happen roughly 50-60 times per second). On the other hand, a modified sine wave is a simulation of the pure sine wave output, where the inverter sharply increases or lowers the voltage in order to switch polarity. Therefore, the output form closely matches pure sine wave yet still has a lot better distortions. If you require to power tiny appliances such as a smart phone charger or energy efficient light bulbs, you don't truly need to get a 2000W power inverter since it will eat significantly more power ( also in standby mode) and also work really inefficiently with little home appliances. On the other hand, if you link a coffee equipment to a 150W inverter you will promptly blow a fuse (if not the inverter itself). Therefore the power ranking of the inverter need to be picked based on the power consumption of your load. The complying with table contains the regular power consumption of some common home devices as well as the recommended inverter rating. * Home appliances noted with a star are likely to have a starting power consumption several times more than their typical functioning power ( generally this is triggered by electric motors). This need to be considered when selecting the correct size of inverter. For example, despite the fact that electric lawn mowers have a regular functioning power of 1000W, their starting power is over 4000W. This means that an inverter with a continual power of 2000W is not appropriate, since its peak power is limited to only 4000W. Always think about the starting power needs of your tools - especially gadgets with electric motors - when selecting the best inverter.