Look over these well documented installs. Keep in mind that cost is way down and if you shop around you can get payback times down. My payback time is 5-5 ½ years and that is if power cost does not increase during that time.
Designing and Installing a Grid-Tie PV System
Doug's New 4.6 KW micro inverter DIY Grid Tied PV Array
At first I looked at complete packages but they were never complete for my install.
I used more supports on the racking than the bare min....