I have a solar kiln that I use to dry the lumber that I cut. It is a solar kiln that uses the heat from the sun to heat the lumber stack and force the moisture out of the wood cells. I have used this method very successfully to dry all types of wood from ash to sycamore and everything in between. I have it currently loaded with 3 1/2" thick basswood cants. It is easy to run and very difficult to mess up the lumber drying process. I air dry my basswood first in stacks outside as it loses moisture very quickly in the early spring. The lumber is then put into the kiln and with the suns help it will finish drying to about 9% moisture content. This year mother nature has been a little stingy on sunny days but it is still drying with just the fans blowing air thru the stack. You can see the difference in the readings of the meter. Once the sun does show up it will finish fairly quickly.