So he'll be just shy of age 40 when that contract expires.
He keeps talking about the Premier League with County, even if they get three successive promotions and reach the PL, Sol will be 38 going into that season. There's no way he'll be good enough then to play in the Premier League, especially as he'll have been playing against sub-standard opposition and will have no legs left at all.
Blatantly should have done another season in the PL or Championship before jumping down the divisions.