I've seen this happen with botania too.Whenever you put a solar panel or extractor or generator(might be more blocks haven't tested them out), by right clicking on the side of another tile entity the world crashes and becomes corrupted until you delete the thing from techreborn with mcedit.
Crash report if it helps:
http://pastebin.com/1ftEvNVe

Ok, I know whats wrong. I will push a fix soon

Thanks for the extremely fast answer.

No worries :)