Microinverters are becoming more and more popular. The monitoring capabilities are awesome. The warranty is amazing. These little guys sit under a solar photovoltaic module and convert DC energy to AC energy right on the roof. I have been specifying the new M215 model, and the feedback from the installers in the field and from customers is great.
I was taking a look at a system recently using the web monitoring, and it is blowing away expectations. Long term study will be needed, but this Sanibel Island 5kW Photovoltaic array has exceeded average annual estimates by over 10%, and this site has some real shading issues.
We deal with shade at many homes in Southwest Florida. Tall trees like pines and cypress are everywhere, and can cast shadows many home sites away. Owners have little control over tree trimming in some cases, and many trees are protected. The microinverter is a great solution, minimizing shading losses. Traditional solar arrays use strings of solar modules. Microinverters have on solar module per inverter, so each one can operate independently and optimally.