Here's what I did. I have eight Rich Solar 200 watt, 24 volt panels. Next year I will replace the rooftop A/C with something more efficient. Once I do that, I can fit two more panels on the roof. I could do it w/o replacing the A/C, but that would make it difficult to walk on the roof.
I ended up using aluminum unistrut, stainless steel sping nuts, and EcoWorthy aluminum tilt mounts. I don't think I'll be tilting panels very often, but it's very nice being able to easily tilt them for maintenance, wiring, etc.
In full sun, I get about 1200 watts out of the 1600 watts.
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