You need to consider the following points when selecting a power inverter。
1.Power Requirement
Rated power. The rated power of the power inverter should be larger than the total power of the electric appliances.
Surge Power. If there are appliances with high surge power such as motor or pump, you should choose a high power inverter with endurable surge power.
2.Input Voltage Range
Compatible power supply. The input voltage range of the power inverter should be consistent with the out put voltage of the power supply sources such as solar panels, or batteries.
3.Output voltage and frequency
Output Voltage: The output of the power inverter should be consistent with the appliances. The common uses are 110v and 220v. ect.
Output Frequency: Normally 50Hz or 60Hz, it should be consistent with the appliances.
4.Wave types
Pure sine wave: it is suitable for precise equipment, such as medical equipment , power audio amplifier. Ect.
Modified sine wave : it is suitable for home appliances such as lights, TV ect.
Square wave: It is suitable for simple equipment, such as electrical tools, but the efficiency is low.
5.Efficiency
Conversion efficiency: The high efficiency power inverter can reduce the power loss. The conversion rate is normally above 90%.
6.Protection function
Overload protection to avoid over load damage.
Short circuit protection to avoid short circuit error.
Over heat protection to avoid over heat damage.
Low voltage and high voltage protection to avoid input voltage abnormality.
7.Heat radiation and installation
Heat radiation design, a good heat radiation can make the power inverter work longer . Please make sure the air ventilation is good.
Installation: You can install the power inverter as wall mounted or standalone.
8. Brand and after sales service.
Brand selection. Choose a famous brand inverter, the quality can be guaranteed.
After sales service: A good after sales service can reduce many subsequent problems.
9.Budget
Cost performance ratio： Choose a power inverter with good cost performance ratio and it can also meet your needs.
10.Application scenario
Home use: Choose a relatively low power power inverter with low noise.
Industrial use: Choose a high power inverter with reliable performance.
Solar system: Choose a power inverter which is designed specially for solar system.
Conclusion:
When you choose a power inverter, you need to consider comprehensively the following points power, voltage, wave form, efficiency, protection function, heat radiation, brand and budget, so that the power inverter can meet your specific demands. A reliable power inverter can supply the stable power for you.