I'll be optimistic and say he comes in at 245lbs, still fat but at least a better version of Solis than we have seen for sometime.
Going from 271 lbs (or more than that pre-fight...) to 215 lbs in 1 year would not make him a healthy athletic male. It would be a big strain on his system ala RJJ.
There is a thread hear saying Solis is down to 247. I have to admit I have not read the thread so I don't know where the information comes from. If it comes from Solis's camp. Than My guess is that his real weight is closer to 257 than 247. My guess is that he comes in the 250-260 range.