Setting up the Solar greenhouse

One of the fall projects I have worked on is creating a completely solar greenhouse. I built this right over my moso bicolor so I can protect it as well as speed up its growth. I'm also using it to place some of my bamboos so they can grow a bit more through the winter. My objective is to insulate it well enough so that additional heating will not be necessary here in zone 6a. At this time of the year, the greenhouse typically raised the greenhouse about 5-20F, but those numbers typically increase in the middle of the winter.

Here's the outside of it.