Solar in Miami has the sun, the salt, and hurricane wind, in that order of daily life and in the reverse order on the worst day. None of it matters if the roof is tired. Tile and flat roofs are common, and both make attachment a structural question rather than a decorating one. An array on brittle underlayment or a soft deck means the hardware comes off for the roof work, or the roof work fights the rails. Start with roof age, material, and whether anyone has been on it lately.
Wind wants the rails tied to structure, flashed like a roof penetration, and specified for salt. Coastal metal that was casual about the air will pit. A beach house and a house well west of the bay do not corrode on the same clock, so say which one you have. Shade is the other local liar. Palms, a neighbor's tower, and a parapet can cut the day in ways a quick glance from the driveway misses. Modules also lose output when they sit on a roasting roof. Heat is not a footnote here.
Ask whether a person stood on the roof. An aerial picture has not felt a spongy deck, a cracked pipe boot, or a panel that is already full of breakers. Ask which module and inverter are named, where the inverter will live in salt air, and who gets the call when it goes quiet. If you are in a tower or a community with rules about the street slope, the roof may not be yours to touch. Say that before anyone draws a layout on a surface you do not control.
Permits and the utility's permission to operate are part of the job, not a courtesy. Ask who files them and what changes if the building department or the utility wants something else. Keep this call on the roof, the shade, the wind, and the salt. If the covering has to be replaced first, make that a roofing call. The hardware can wait for a deck that can hold it. Call the number on this page.