For beginners, it could be useful since there is much less to build. It obviously won't be as useful for the electrical engineers.
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But what off the shelf controller will know what to do with the power factor corrector?
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I think the boost stage controller is integrated into the inverter. If that's the case, it's just a matter of connecting the control connections to the microcontroller. If not, there are plenty of off the shelf PWM chips that can do it.