You've got some bad pipes it looks like too?
15:17:09 [iNFO] [buildCraft] Error creating pipe type 0 (class=null)
15:17:09 [sEVERE] [buildCraft] Pipe failed to load from NBT at 280,62,475
15:17:09 [iNFO] [buildCraft] Error creating pipe type 0 (class=null)
15:17:09 [sEVERE] [buildCraft] Pipe failed to load from NBT at 280,62,473
...
Might have to open the map in MCEdit and delete all those pipes. If it still crashes, delete the solar arrays as well?
As always, make a backup first!