I have visited YGE recently and they are humming along. Got the tour and saw the dedicated workers. It's grimy work but everyone's happy to be working. That's how I stumbled onto this stock...got in a bit high, but holding tight!
Sorry it wasn't technical and none of us asked. But I did notice they were using GT Solar machines. But GT Solar is not public yet. They were slides showing nomads carrying portable solar panels on their pack animals for power. Pretty cool I thought.