How are your solar panels mounted?

Zee brackets, set in a puddle of dicor, screwed to the roof, one screw per bracket if I could get it over a truss, 2 screws on the few where I couldn't, then dicor covering the screw heads. This is for mounting on a EPDM roof.

Mine are screwed down using 2 stainless steel 1/4 screws per bracket(4 per panel)into trusses. Where I couldn't get into a truss I used "Well Nuts" and stainless 1/4" bolts. I don't tilt panels, for the roof's sake, I don't really like unnecessarily getting on the roof. Some day I may set up a tilt set up my set up doesn't meet my needs. I'd have to be more comfortable with the durability of my roof if I set up a tilt mechanism. So far it meets my needs.

I have adapters to tilt mine and for years never used them

I made my own brackets out of aluminum angle bolted together. They get screwed into the roof. I was able to get a roof plan so that each mount is screwed through the roof into a wood rafter. Dicor under the foot of each bracket and around the entire foot once screwed down.

Instead of tilting my panels. I just put up a 4th panel to account for the loss that flat panels give. The less I go up on the roof, the less chance I have of falling off the roof.

I have 8 brackets on each panel that hold to the panel with 1/4" stainless screws/knobs. Since each panel can be raised in any of the 4 primary directions, I've adjusted the brace lengths for summer and winter in the southern part of the US and the same for the northern part of the US. Not exactly optimum for each panel, but by using approximations I'm probably pulling at least 90% out of each panel. Of course this means I have to be aware of the orientation of the bus and need to park it as close to the cardinal headings as possible. Since we boondock a lot and don't put the panels up unless we'll be in one place for 3-4 days or more this method works well for us.

Z brackets and screwed to the roof

Mine are able to tilt in four directions. No running up and down. I just set them at the "optimum" angle for the latitude and month. I generally don't tilt if I'm going to be some place less than three days. It's more advantageous to tilt the further north you are. Some of us don't have the space to just add one more panel.

I took advantage of the raised side rails on my DP to tilt 7 of the 9 I installed.

Mine are riveted to aluminum angle. The angle is held to the roof by six screws per panel.

Four 2 bolt brackets for each of my three panels. Not interested in tilting...up and down a ladder repeatedly. Three panels sufficient so far. Will add a fourth someday. I wired for four panels. Hint - wire more than sufficiently.