Interesting object. I hadn't noticed it before.
For some reason, the parameters are explicitly limited to 6' in height. You can edit the Parameter script by selecting a placed object, doing an Open Object and editing as shown in the attached. (Or similar - I just put a 1 in front of the 6 to make the height limit be 16'.] Save with a new name in your embedded library.
For the board on board that you show, this seems to still work fine. Get a few weird results with some other panel types after the above quickie mod, but probably good enough for what you want.
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