Have you ever stepped on the pit of inverter, a friend who is engaged in photovoltaic energy storage, factory DC power supply transform-

ation and new energy equipment procurement? The equipment spent thousands of dollars thought that it could stably realize AC-DC 

conversion power supply, but as a result, the overload protection was triggered as soon as the pump motor was connected, and it could 

not be moved directly; Either it hasn't been used for half a year, the conversion efficiency is getting lower and lower, the electricity bill is 

not saved much, the equipment has broken down at both ends in three days, and the after-sales wrangling has delayed the progress of 

the project, and later it will be said that the selection is not reliable.

Many people choose industrial inverter for the first time, but they only focus on the price and nominal voltage and power, ignoring se-

veral key selection details, so it is almost inevitable to step on the pit. We have been deeply involved in the field of industrial power 

supply for many years, and have served the power supply facilities of hundreds of manufacturing plants and photovoltaic energy storage 

projects. More than 80% of the customers we have contacted have stepped on the same pit for the first time. Today, let's make clear the 

three most common mistakes in selection and the corresponding practical judgment methods to help you spend less money.

The first pit: only calculate the rated power of the equipment, leaving no peak margin. Many people choose the inverter with the corre-

sponding power directly according to the rated power of the load, thinking that "enough is enough". However, the inductive loads such 

as water pump, motor and compressor will generate 2-3 times of surge current at the moment of starting, which far exceeds the rated 

power, and it is easy to directly trigger the overload protection of inverter and even burn out the internal power module. Practical sug-

gestions: for purely resistive loads (such as heating and lighting), just reserve 20% power margin; With inductive loads such as motors 

and water pumps, at least 2-3 times of peak power margin should be reserved. For example, a water pump with a total load of 5kW is 

used for power supply, and a power frequency inverter with at least 15kW is selected, so as to withstand the start-up shock and ensure 

long-term stable operation.

The second pit: regardless of correction wave and sine wave, choose the wrong type for cheap. Many buyers feel that "it is all variable 

voltage output, and the correction is half cheaper than pure sine wave, and it can be saved." However, the output of the correction 

wave is a square wave with high harmonic content. When it is equipped with precision instruments, servo motors and medical equipment, 

it will interfere with the operation of the equipment and inaccurate data measurement, or directly burn out the motherboard of the equi-

pment. With motor load, there will be problems such as high noise and serious heat, which will greatly shorten the service life of the 

equipment. Practical suggestions: for ordinary lighting and simple resistive load, the cost can be controlled by modified wave inverter as 

appropriate; However, with precision equipment, motor load and industrial automation equipment, the pure sine wave inverter is directly 

selected, and the output waveform is consistent with the commercial power, with no electromagnetic interference, strong equipment 

adaptability and more reliable long-term use.

The third pit: only look at the low-priced parameters, ignoring the protection level and environmental adaptability. Many low-cost inver-

ters use civil-grade components, plastic shells, and the heat dissipation design is simple. The protection level is only IP20, so they can only 

be used in a clean constant temperature room. However, in the factory workshop and outdoor photovoltaic energy storage scene, the 

temperature is generally high, the dust is much, and the humidity is high. This kind of low-cost inverter will not take long for components 

to age, heat dissipation failure, and even short-circuit burning. Practical suggestions: For inverters installed in industrial scenes and outdoors, 

metal body and models with intelligent temperature control and heat dissipation are preferred, with protection level at least above IP30, 

and IP45 and above for wet and dusty scenes. Normal industrial-grade inverters will be marked with a wide temperature operating range, 

which can work stably from-20℃ to 60℃, while most civilian models can only be used at 0-40℃.

In the final analysis, industrial inverter is not an ordinary accessory that can convert voltage, it is the core of the stable operation of the whole 

DC power supply system. Incorrect selection will not only waste the procurement cost, but also delay the production and damage the equipment 

when it really breaks down, which will not be worth the candle.

If you are not sure how much power and what type of inverter to choose for your scenario, tell me your load equipment type and usage scenario, 

and I will help you make an exclusive configuration scheme and parameter reference. Baoweite's full range of pure sine wave inverters covers multiple 

power sections, with complete power frequency and high frequency models, and supports customization of off-grid and grid-connected scenarios. 

It has helped hundreds of factories and energy storage projects solve the problem of power supply adaptation.

If you need type selection and transformation, you can consult Baoweite for the scheme. Thank you for browsing. You can collect official website of 

Shenzhen Baoweite Power Supply Co., Ltd.