Inversion inefficiency?
The process of inverting DC to AC has relative standard loss of efficiency per KWH converted, but there is also an inherent system unit loss of efficiency per inverter. Otherwise the micro-inverter technology would have to be inherently more efficient. As you say the technology is the same between micro and macro inverters. Assuming micro-inversion technology is equally efficient as standard macro-inverters - multiplying the inversion process with numerous micro-inverters and each's systemic inefficiencies - would logically and cumulatively increase the efficiency loss per micro converter used - making the micro-inversion process significantly less efficient than a single inverter's single system loss. So unless you have a significant economic advantage to micro-inverters - which isn't supported by limited details of the article, micro-inverters make no efficiency sense at all.
