I too am a fan of PV solar on a ground mount array. Ground mounting was a requirement to gain approval from the wife. She was all for solar, and all against putting holes in the roof of the house. She also pointed out how difficult it would be to get up to our roof to clean the panels.
We saw an episode of "Living With Ed {Begley, Jr}" where he got up on the roof and cleaned the dust, dirt, bird droppings from his solar array and she pointed out how tough that would be on our roof. She was right. The ground mount makes maintenance easier.
Very nice job on the system. I hope to expand my little 1050w array soon.