The Chinese made high frequency inverters on today's market (and they're ALL Chinese made) are not only short lived and weak when compared to conventional off grid inverters, they can also be dangerous.

You'd be lucky to get even two years of service from a 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 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, essential 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. Lightweight. high frequency inverters run much hotter than low frequency, transformerbased inverters which makes the low cost, off spec, Chinese made components such as capacitors, diodes, resistors and ICs that are used in the cheap inverters that are used in these inverters, far more prone to early failure. Another major consideration with these lightweight, high frequency, transformerless inverters is safety.

All it takes is for the AC output monitoring circuitry to fail and one of the MOSFETs in the inverter's HBridge circuit to short to ground, and these 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 high frequency inverter hucksters, is that the vast majority of these inverters are nonrepairable. 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 far better alternative is to invest a little more money and purchase a hybrid, low frequency, transformer based inverter charger. Low frequency transformer based solar generators last many years longer than these toy high frequency solar generators, and can easily power high surge loads without being damaged and without damaging your appliances. That's why the big name brand inverter manufacturers like Schneider Electric, Outback Power, Sigineer Power, Victron Energy and others, all use a low frequency topology in their offerings.