A Particle System may suit you..
- Create a Group CtrlG of variants of your panel, ensuring the geometry of each item is aligned with respect to its origin.
- Assign a Particle System to a guide for the collection of panels. (Here, the guide is a mesh with six vertices on an edge)
- Set the Render to Group, as shown, with 'Pick Random' to randomly distribute variants.
You can get more control of the order in which the panels appear by using the 'Count' mechanism in the same panel, which allows you to fix a cycle of choices from the group repeating internally if wished.
A Particle system also allows you to add small random variations to the relative locations and rotations of each instance, for added realism.
You can edit any of the panel variants, and the changes will be reflected in the collection.
A strip of faces, or an array of another object, may be a better guide, depending on the sort of control you want.
You can make the panels real instances by pressing 'Convert' in the guide's Particle System modifier.