After a hectic few months, the micro inverter is now fully working with decent results.
I used a 3 KHz low-pass filter mainly because of cost but the sine wave still turned out to be quite good. The inverter delivers between 115-120V (RMS) and
can handle up to 3 Amps all while delivering a 60 Hz sine wave.
It’s a decent outcome for a first time project but there is still room for improvement such as making it more compact.