There's no way to disable damage from radiation iirc
Thanks, but the problem is not disabling Hybrid Solar Panel, is adding the recipe again as said CrossVas "Disabled recipe can be re-added with CraftTweaker or through IC2-recipes itself."
So, first at all, you must open IC2Exp mod's jar file (in my case it is industrialcraft-2-2.8.109-ex112).
Then go to assets\ic2\config\ (your path should be industrialcraft-2-2.8.109-ex112.jar\assets\ic2\config\.
From assets\ic2\config folder copy the file shaped_recipes.ini into your_minecraft_directory/config/ic2 folder (if you don't have ic2 folder in your config folder, you must create it)
After that open shaped_recipes.ini file with any text editor (for best result I'd recommend to use NotePad++ or AkelPad)
Put this code* at the bottom of shaped_recipes.ini file.
Restart your minecraft.
; Hybrid Solar Panel
"CLC|IPI|ASA" C:ic2:crafting#carbon_plate L:OreDict:blockLapis I:ic2:crafting#iridium P:tri_addon:machines@10 A:ic2:crafting#advanced_circuit S:advanced_solar_panels:crafting@4 = tri_addon:machines@11
!!! This code must be one line written !!!