15:53 Dec 10, 2011 

This can also be interpreted as follows:
The first sentence describes a framework into which panels are going to be placed.
The other sentences describe the panels that are going to be mounted in or on this framework.
If that is the case, I would still agree with Fourth's expression, but disagree with his explanation (and with BD's alternative expression "panel frame").
In the spring I plan to build just such a structure: a framework of wooden posts between which panels will be mounted.