This could be something more like a planetary gearbox or a differential that can connect 3 systems (e.g. gas engine, electric motor, wheels in a hybrid car). Bu

This could be something more like a planetary gearbox or a differential that can connect 3 systems (e.g. gas engine, electric motor, wheels in a hybrid car). But if requirements are too different 2 generators may be the better option. The tower would probably need reinforcements for the additional weight, but I have no idea about the magnitude required.