Performance cost analysis of solar installations over the years ..

This is an excellent performance cost analysis of a solar installation in NY state in US, twelve years back. For this unit, the pay back time is 25 years, almost the same as the life of the panel. No battery costs as the panel is grid connected, excess power during a hot sunny day is fed to the grid and shortage power needed at night or during winter months is taken from the grid.  Click here.. The panel is manually tilted by removing screws to face the sun, two times a year  on March 21 and Sept 21.

Panel material technology has changed, equipments have became modern, here is the cost performance analysis of a modern installation. Kochi airport, the world's first and only 100% solar powered international airport  technical consulting and installation by Bosch Germany   has costs recovered in 5 years and an extra life of an additional 20 years.

The panels though they have a long life, more than 50 years, due to microscopic sand corrosion on the glass surface of the panel, the effective light incident and converted to solar power decreases by approximately 1% every year, ultimately bringing down the efficiency. 

I am looking for a video on a modern solar panel system that gives a cost performance analysis helping us do a comparison.