Building a small Solar Kiln to dry wood

A solar kiln I have built this summer to dry some wood I sawmill from two old falling trees we had in the garden, and for future more I might get so I can dry my own wood. The kiln is based on the well know Virginia Tech design, adapted for my own needs and materials I could find easily on local hardware stores. Mine has a storage space inside of about 1.5 m in length, m wide and high (~5’ x ’ x 2’ ). This design uses the sun to heat up the wood inside during daytime in order to release moist