Depending on what you are running, I would recommend 2 ea 6V deep cycle golf cart batteries in series. This will create a very substantial 12V power source. Avoid single 12V deep cycle batteries, they don't hold their charge as long.
You would need to use expanding inserts in the brick work. If the brick are concrete, probably ok. If it's fired clay, use caution, don't "break"the brick when drilling or tightening the bolt.
I used them to mount two panels to the top of my camper, which is a converted cargo trailer. I used 1" 14g square steel tubing for the brackets which I welded together, it could have been bolted. I have just been on a six state trip with the camper and had no problems with the mounting.
It would take 4 bolts to remove the panel. The panel also requires no servicing, beside a general cleaning that I wouldn’t remove it for.
From home depot of course, online.
5/16" stainless steel
They are not SST. The description is misleading. The bolts I received are magnetic, indicating something other than stainless steel...
Yes it provides the 1' clearance
Yes, I used the to mount my panel on a pole shed.
Yes. I would put the short side facing the front. Least wind resistance.