I estimate I could mount an awning at the back of my truck that is no more than 71" wide when closed up. The problem I think I'm going to have is the 180 like 23Zero's is only 60" wide so it only comes out from the vehicle 60". I have a brand new 10' x 10' popup canopy that might serve the purpose a lot better. It gives me 10' out x 10' wide coverage, a whole lot more coverage than that 23Zero and I'm guessing it will be the same for a lot of the other 180 degree awnings. The problem is that popup doesn't mount to the rack on my truck so takes up storage space and takes more time to setup. Now that I'm at home and can get to the website I need to go to Overland Vehicle Systems and checkout their 180 degree awning but I think that one might be too wide to have at the back of the truck. I'll probably change my mind on this a few times before I find the right solution, has been the case with a lot of my Overland purchases/projects LOL!
Edit #1: Ok, the Overland Vehicle Systems 180 is too wide where it mounts and ARB has straight out awnings that might work but go from 78" wide to 49" wide. I'm hoping to find something that is as close to 71" wide as I can get. If you can think of some other awning manufactures please list them here, the more I have the more research I can do for the right solution.
Edit #2: Well more research has me thinking a side awning is the best solution for mounting at the back of my truck, just have to find one that is as close to 71" so I can get maximum coverage. I have my kitchen setup at the back of my truck so that is why I want coverage there. Again the right 270 degree awning just might do the trick. See, already changing my mind LOL!
