Thanks for all the help. I ordered mounted system. 2 x 100w panels but I bought wiring and controller for 4 x 100w panels so I can expand as needed by adding just a panel.
One more question.. I have a TPO roof.... Dicor makes a 2 part system for TPO roofs (1 part primer, 1 part dicor), I bought this and it was expensive for the primer ($40). I also see the Dicor 501 LSW lists as being usable on TPO.. any thoughts on this?
Besides Dicor do I need anything under the mounting brackets? I figured just a healthy bead of dicor under and call it a day.