To judge the quality of an inverter, you can start from the following aspects:
Appearance and craftsmanship
Shell material: High quality inverters typically use fire-resistant, high-temperature resistant, and high-strength engineering plastics or metal shells. The metal shell has good heat dissipation performance, which can effectively reduce the operating temperature of the inverter, improve stability and safety; Engineering plastic shells have good insulation performance and corrosion resistance.
Welding process: Check the solder joints on the circuit board. The solder joints of high-quality inverters are full, uniform, and free of virtual soldering or solder leakage. Good welding quality can ensure stable circuit connections and reduce faults caused by poor contact.
Overall assembly: The overall assembly of the inverter should be tight and firm, with no looseness or shaking between the components. The surface of the shell is flat, without obvious scratches or defects, and the components such as buttons and interfaces are installed firmly and operated flexibly.
performance parameter
Conversion efficiency: This is an important indicator for measuring the quality of inverters. An efficient inverter can convert more direct current energy into alternating current energy, reducing energy loss. Generally speaking, the conversion efficiency of high-quality inverters at full load should be above 90%, and some high-end products can reach 95% or even higher.
Output voltage stability: High quality inverters have stable output voltage with a small fluctuation range. Under different load conditions, its output voltage can be maintained within ± 5% of the rated value to ensure the normal operation of electrical equipment.
Overload capacity: High quality inverters should have a certain overload capacity and be able to withstand loads exceeding the rated power in a short period of time. Usually, inverters should be able to withstand an overload current of 1.5 times the rated power for 1-2 minutes without damage.
Protection function
Overvoltage protection: When the input DC voltage exceeds the maximum allowable value of the inverter, the overvoltage protection function is activated, cutting off the input circuit to prevent damage to the inverter due to overvoltage.
Undervoltage protection: When the input DC voltage is below a certain value, the undervoltage protection is activated to prevent the inverter from working at too low a voltage, damaging internal components, and also protecting DC power sources such as batteries.
Over temperature protection: The inverter generates heat during operation. When the temperature is too high, the over temperature protection function will automatically start, reduce output power or stop working. It will resume operation after the temperature returns to normal to prevent the inverter from burning out due to overheating.
Short circuit protection: Once a short circuit fault occurs at the output terminal, the inverter should be able to quickly detect and cut off the output to protect the inverter itself and the connected load equipment from damage.
electromagnetic compatibility
Electromagnetic interference: High quality inverters should comply with relevant electromagnetic compatibility standards and have minimal electromagnetic interference to the outside world. It will not cause significant interference to surrounding radio equipment, electronic instruments, etc., such as radio noise, TV screen interference, etc.
Electromagnetic anti-interference: The inverter itself should have strong anti-interference ability, and be able to work stably in complex electromagnetic environments without being affected by external electromagnetic interference, resulting in output abnormalities or faults.
Shenzhen Yunhai Company has certain advantages in product quality, research and development capabilities, production processes, etc. Our products have undergone long-term market testing, ensuring better quality. Comprehensive after-sales service is an important guarantee for product quality. We offer a longer warranty period and have a professional after-sales team that can provide timely technical support, maintenance services, and more to our customers.
