Found the problem HanFox. There are three arrays that look the same and one that doesn't.
If you try to place the one that's the silver block, boom.
If you use the three that look the same, works fine.
I think that's just a behind-the-scenes block that we shouldn't be using
What's with the 188:3 HV Solar Array?
If you cheat it in and place it it crashes MC (yes, yes, cheating bad, but things need poking...).