Looking forward to installing the solar electric system at the high school because it's the first using the S-5 mounting blocks attached to the standing-seam metal roof.  Think it should work fine and give plenty of space under the panels to keep them cool.  And really like using the EnPhase inverter because of it's ease with expanding the system in the future along with the Envoy Gateway monitoring that shows the output of each panel...verses the whole array.  Cool huh!