I decided today should be installation day for the Dune 4WD awning.
Option three was chosen - install two roof bars and bolt the brackets for the awning to the roof bars.
The reasons for going this way:
Strong. By installing the two cross bars with careful attention to not building in any stresses, then attaching the Dune brackets, the load from the awning is shared to both walls.
Bracing the roof can't be a bad thing.
(Warmish today. It maxed out at 28 C. If I have my maths correct, I should see less than 1mm of expansion or contraction in the temperatures these bars are likely to experience. Engineering Toolbox says mild steel expansion coefficient is about 5.9/1000 millimetres per metre per degree c.
So, having assembled everything at a sort of median South Oz temperature, and assuming I loaded the calculator properly, I'm going to see almost negligible forces trying to pull the wood apart.)
I get somewhere to mount the solar panel.
So I got some 30mm x 30mm x 2mm galvanised square tube, aluminium was available but very expensive, and got busy.
The L brackets to attach the bars to the cabin came from Northern Caravans. They are now agents for Adventure Kings, and they had brackets on the shelf. $25 per pair, so $50 for 4 brackets. When I added up buying 30mm x 4mm flat steel to make my own, buying 8mm stainless steel bolts (included with the brackets I bought), and several hours of work to fabricate, they started to look quite cheap indeed.
So first job was to work out spacing and mount the L brackets to the camper.
The awning is 2m long, the solar panel is 1.65m long. The biggest spacing I could come up with and not run into clearance issues in the cabin for the bolt holes was 1.05 metres. That leaves 0.48m overhang at each end for the awning, and 0.32 overhang each end for the panel.
I figured that will work.
Almost finished, but ran out of steam. Job for tomorrow morning.
So I bolted the L brackets to the side walls, with nice flash whacko 8mm stainless steel bolts and nyloc nuts. Sealed the bolt holes with some 2 part JB weld polyurethane marine sealer I bought for my little catamaran.

- Rearmost of the two rails
- 20221206_222118.jpg (34.99 KiB) Viewed 2264 times
Closeup of rear rail

- Closeup of rear rail, awning bracket on port end
- Closeup of rear rail.JPG (53.24 KiB) Viewed 2264 times