In this video I will tell you the basics about SPWM and show you how we can use it to create a pure sine wave. Afterwards we will have a closer look at the EGS002 which is a cheap SPWM driver board from China. I will create a DIY pure sine wave inverter with it and show you why it is not really a decent alternative to commercial inverters.

Comment:
Nobody should underestimate the difficulty of inverters. They are hard to make properly, and mains voltage ones are frickin’ dangerous too.

This teardown article will delve into the architectural design and components of a solar inverter card starting from the Solar panel DC inputs and working our way through the DC to AC conversion process to the AC output that is sent out to the power grid. We will show what features need to be implemented into such a design to meet various safety and other performance standards as well as stringent power company demands upon the signal that is put onto their grid.

It was many years on random use. Then it served several years on my car, where it finally failed. Maybe several years
of temperature cycling (from almost -30 degrees celsius to +50 degrees when headily loaded) and sometimes humidity had finally made it to fail.

I would say that it was OK quality product that served me several years. I powered several electronics devices (laptop, chargers, lamp, etc..) with it without problems.