jrnymn7 wrote:
I'm thinking something along these lines:
http://www.homedepot.ca/product/magnetic-protractor-angle-locator/967209
That is pretty much what I have attached to my set-square. You set it on the panel and read the angle. Works great. Or you can just wait till high noon with no clouds just then and play with the tilt until it shows the rated panel Isc. That's your angle for high noon.
You need to know where South is too. It is where the sun is at 180 True, which is also at pretty much its "high noon" altitude. "Noon" on your clock is what it would be in the middle of your time zone, so if you are not there then noon is earlier or later--if you are west of the middle it is later. So where we camp in the summer it turns out that "noon" is more like at 12 after 1.