The packages came and one was larger than I anticipated. The flexible solar panel stood 49" tall by 22" wide. The product description described the lamination as "Aluminium + ETFE + Silicon cell + EVA + Tedlar" but it just seemed like a thick, rugged fiberglass panel to me.
I am a novice at solar technology and the instructions were not easy to figure out, but I eventually did. The controller came with a template for placing mounting screws on a backboard, which I installed in the front compartment on the back wall behind the new Lithium Ion batteries I just hooked up.
I felt foolish when I found that the cables coming from the panel and the extension cables to the controller were keyed, a set of male and female for each that were reversed for positive and negative so that you can't cross-connect them once you've wired the controller and batteries correctly. The controller had three sets of connections in which to insert and tighten bare wires -- one pair for the solar panel, one for the batteries and another for a load, in case you are powering a device directly. I did have to make the battery cables and strip any ends being connected to the controller.
With everything set up, power flowed with no issues. My battery monitor is Bluetooth-enabled and I was able to see the input into the batteries okay, but since the batteries had a full charge, little electricity was drawn. I was happy that it still showed power, however.
The flexibility of the panel is impressive. It weighs about 6 pounds and is stout but can be flexed for temporary mounting on a curved surface, such as an RV front cap. However, from the manufacturer: "Once in a while bending may be possible, but we do not recommend long - term bending to affect the life of the panel." My main purpose for using a solar panel is to charge my batteries when boondocking, allowing for minimum use of my generator. I am confident that this setup will work great.
I rated this 4 out of 5 stars only because the instructions could be better written and/or illustrated and I did have to do some of my own cabling.