Solar in Oklahoma City sits on roofs the wind can see from a long way off. Fringe lots and streets near the lake offer open south planes and almost no shade, which is the opportunity and the hail risk in one glance. Older streets under a real canopy may not have a useful slope at all. A low ranch pitch collects stones and gives uplift a broad surface. The covering underneath has to be ready, not merely present.
Call with the part of town and a ground report on the south and west slopes. Bruises, bald spots, patched boots, a ridge that wind has already worried: those come before modules. If you remember a hail day that marked gutters and coils, assume the roof was in the same storm and say so. An attic stain ends the solar conversation until the roof conversation is honest. Hardware will not dry a deck.
Use the call to ask about wind and about the next roof, not about a fantasy of calm weather. How attachments and flashing are meant to survive a south wind with rain in it. How the array comes off when the covering is due, and who deals with a leak at a penetration. You are not approving a drawing. You are checking whether anyone plans for the city as it is.
Garage panels are the usual electrical story on these ranches, tucked beside the water heater and already crowded. Say if that is your layout. Older houses closer in can have the panel in a closet or on a porch and the same crowding in a different room. Say whether you would own the equipment. Utility permission is part of turning the system on, and it is not something to discover after the rails are on the shingles.
Oklahoma City sun is generous on an open slope and ruthless on a roof that hail has already started. Look at your exposure, remember the storms you personally saw at that house, and call before a remote picture overrules the bruises. Call the number on this page.