This type of inverter has a high power efficiency of up to 95%, meaning that the power issued by the battery to the output power at 220v ac will be distributed 95% with relatively low power usage at a certain inverter capacity so that it can save battery power if you have a sufficient battery system, slightly different from the low-frequency inverter EGS002. In most cases the damage to the inverter is more of a high-frequency type or switching inverter because there are many in the market and a wide price range so that it can be found at competitive prices, most cases are damage to the H-Bridge MOSFET which meets directly with a 220v load, different from low type inverters frequency using a transformer, to build a high-frequency type inverter with good quality and durability requires more supporting components in order to get good quality on the inverter
I have made a high-frequency transformer version of the inverter, with an input voltage of 24VDC which you can see in the preview schematic below, to see more details you can download the PDF version of the schematic.
In the video, I use the FDP054N10 MOSFET for the DC STEP UP part and the W20N50 MOSFET for the SPWM EGS002 section.
The selection of the MOSFET greatly affects the power output as well as the shape of the sine wave. For components such as resistors, capacitors, and others, use quality components, install the values as stated on the PCB label or download the part list below.
The PCB is working normally 100%