Hi everyone. New here. OK, so after reading this forum and reading the Benson document from 2002 on walipinis, I am somewhat confused still. In the section "Angle of the Roof to the Sun" on p. 6 of the Benson document, they say this: "2) Add approximately 23 degrees which will make a tilt angle of 39-40 degrees for the La Paz area." I'm not in the La Paz area, and I have no idea where the 23 degrees came from. I assume the 23 degrees number is some sort of constant, but I have no idea what that constant is or where it came from. Earlier in the book, it was clear that the writer wanted you to gain the best heating during the 3 winter months and reflect heat during the summer months.
Now I hear Zach Weiss saying that's probably not the best idea, especially if you wish to grow tropicals. Having done some research on Zach's work, it's obvious he's someone who knows what he's talking about. I want to grow some tropicals and citrus in mine here at -34.5205°N 94.3105°W. I got a chart from the University of Oregon SRML for my lat and long, but I don't know what I'm looking at. I'm attaching a PDF of that chart to this post. 57 degrees is a very steep angle, one I am not too keen on building.
So I guess I just want to know how best to go about angling the thing. If I want avocado, banana and citrus year round, I mean.