String inverters are very inefficient in multiple ways over micro- and nano-inverters. A single shaded solar panel will bring down the electricity yield of the

String inverters are very inefficient in multiple ways over micro- and nano-inverters. A single shaded solar panel will bring down the electricity yield of the entire string. You solve heavy tree cover and other sources of shade with individual MPPT (maximum power point tracker) 4 cent single chip nano-inverters per solar cell, 72-122 per solar panel. For $2.88 extra your solar panel can get 20%-30% more electricity if any part of your panel has shade part of the time. For installations with string inverters you get even more savings when you replace them with nano-inverters.