Hello, I have recently stumbled into this error, you see, it is Toomanyitems, it can spawn machine blocks, reactor chambers, all the items.
Heres The Catch, All of power genorators excluding the coal one, Don't show up!
In the Config it does not show any ids or existent ids for the reactor core, solar panels, ect.
Please Help with this stressing error as soon as possible
oh, and i can still craft them 
What version of TMI are you running? I can spawn solar panels and everything else just fine. I have Version 1.0.0 2011-11-29, maybe you need to update. Also if you are playing SMP it might be normal, last time I tried TMI in SMP it also didn't show these things, but as you didn't state whether SMP or SSP I don't know which one you mean. If it is SMP you most likely can't do much about it. Try adding the spawn command for items with Damage Values to the TMI config.
