I built and used a
solar drier in the UK. It was based on Dick Strawbridge’s design in “Practical Self Sufficiency” book and worked well for our family at the time. It’s a lot smaller than the designs I’ve seen here on permies. I built it in an afternoon with a kitchen cabinet I found at the tip. However, it was plenty big
enough for home grown produce and when there was a glut at the farmers market. I think if I had half an acre of fruit
trees I’d build the version I’ve seen on this site.