Mainly divided into two categories, one is Sine wave inverter, the other is square wave inverter. The sine wave inverter outputs the same or even better sine wave alternating power as the grid we use on a daily basis, because it does not have electromagnetic pollution in the grid. Square Wave inverter output is poor quality square-wave alternating power, its forward maximum to negative maximum value almost at the same time, so that the load and inverter itself caused a violent instability effect. At the same time, its load capacity is poor, only for the rated load of the 40-60%, can not carry the perceptual load. If the load is too large, the three harmonic components contained in the square wave current will increase the capacitance current in the incoming load, which will damage the power filter capacitance of the load when serious. In view of the above disadvantages, there is a quasi-sine wave (or improved sine wave, modified sine wave, analog sine wave, etc.) inverter, its output waveform from the forward maximum to the negative maximum value has a time interval, the use of the effect has improved, but the quasi-sine wave waveform is still composed of polylines, belong to the square wave category, the continuity is In summary, sine wave inverters provide high-quality alternating power, can drive any kind of load, but the technical requirements and costs are high. Quasi-sine wave inverters can meet most of our electricity needs, high efficiency, low noise, moderate selling price, and thus become the mainstream products in the market.
The production of square wave inverter adopts simple multi-harmonic oscillator, and its technology belongs to the level of the 50 's, and will gradually exit the market. Inverter according to the different power source, divided into coal-electric inverter, solar inverter, wind energy inverter, nuclear inverter. According to the use of different, divided into independent control inverter, GRID-connected inverter. The world's solar inverters, Europe and the US more efficient, European standards are 97.2%, but the price is more expensive, the efficiency of other domestic inverters are under 90%, but the price is much cheaper than imports. In addition to power, waveform, the efficiency of choosing an inverter is also very important, and the higher the efficiency, the less electricity is wasted on the inverter, and the more electrical energy is used for electrical appliances, especially when you use a small power system that is more important.