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- เผยแพร่เมื่อ 10 ก.พ. 2024
- If you want to install a high frequency inverter for your home with solar panels, click here to learn why some high frequency inverters are not legal to install. "6000xp is not UL9540 certified. YOU CANNOT LEGALLY install in the US along with solar panels." • 6000xp is not UL9540 c...
For a more detailed explanation regarding the use of high frequency inverters for charging an EV, please watch Solar Inverter Catastrophic Failure:
• Solar Inverter Catastr...
The high frequency technology that's used in all larger high frequency inverters is basically the same tech that's used in the Ecoflow portable power stations. Click here to learn how you can damage sensitive electronics when powering high inductance loads like power tools with any high frequency, transformerless inverter. • I ticked off a sponsor
Since the early 1990s, high frequency, transformerless inverters gained the reputation of being disposable inverters or (throwaway inverters) and were meant only for short lived, temporary installations. They were never designed nor meant for permanent installation to safely power a home’s appliances, at least, not for very long.
Even today, after more than 30 years of product development, You'd be lucky to get even two to three years of service from these Chinese made high frequency inverters, especially when powering high inductance loads like full sized refrigerators, large power tools, portable AC units or large microwave ovens. The reason for this is that all of these lightweight, high frequency inverters lack a very critical component. That critical component is an iron core, copper wound output transformer. Without an output transformer to act as a buffer to absorb the electrical surges provided by the “Flywheel Effect” inherent in the physical amount of a transformer’s iron, these surges and damaging reverse voltage spikes must be handled directly by the inverter’s MOSFET transistors, essentially shortening their life.
You might be able to start and run some high surge loads when these high frequency inverters are new, but every time you fire up one of those inductive loads, you're shortening the life of the MOSFETs in these inverters. To make things even worse, lightweight, high frequency inverters run much hotter and their internal components are far more stressed due to their high switching speeds and use of high voltage components, These two factors makes the low cost, off spec, Chinese made components such as capacitors, MOSFETs, diodes, resistors and ICs that are used in these inverters, far more prone to early failure. Simply put, high frequency inverters are better suited for like duty, electronic devices, and low frequency inverter are better suited for heavy duty, high peak power appliances.
Another major consideration with many of these lightweight, high frequency, transformerless inverters is safety. First of all, high frequency inverter don’t have Isolation between the Neutral and Line which increases the risk of a shock hazard. And second, during a catastrophic of the failure of the inverter’s circuitry, all it would take is for the AC output monitoring circuitry to fail and one of the MOSFETs in the inverter's H-Bridge circuit to short to ground, and these high frequency inverters can send dangerous, high voltage, high amperage DC current straight to your connected AC loads which will not only damage most AC appliances but can also set those AC appliances on fire.
Another consideration that is never mentioned by those TH-cam high frequency inverter affiliate salesmen, is that the vast majority of these inverters are non-repairable. After the warranty runs out, you're not going to be able to ship these units back to the manufacturer in China and have them repair them. And at a typical shop rate of $125 per hour here in the US, with no schematic and limited parts availability, it won't make economic sense to even attempt to repair one of these units. Once the FETs have fried and have burned a good portion of the inverter's PCB, (And trust me, sooner rather than later, they will fry.) they basically become a brick.
A much better choice would be to invest in a UL-1741 listed hybrid inverter and a bank of Lithium Iron Phosphate batteries and an inverter that uses low frequency, transformer based technology in its design. Low frequency inverters can handle high surge loads for at least 3x (300%) their continuous rated capacity and they can do this repeatedly, without sustaining damage to their MOSFET transistors, for minutes, rather than the milliseconds that a high frequency inverter offers. That's why the big name brand inverter manufacturers like Schneider Electric, Outback Power, Sigineer Power, Magnum Energy and others, all use a low frequency topology in their design.
