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I checked that solution with technologie leading frequency inverter manufacturers.
It does not work without aditional equipment, like a transformer between Output and charger, or costly filters to get the square wave output voltige a bit more sinusoidal.
The roadster charger needs to see, when sinus voltage goes from positive to negative, and Tesla roadster does not accept this typ of of Grid configuration, and tesla does not support a software update for this application.