Despite the overcast weather, the opening ceremony for Jinko Solar’s new factory in Jacksonville, Florida, was a decidedly upbeat affair. Under a large, white tent, amid a cluster of warehouses belonging to corporate titans like FedEx and Bridgestone, the event’s speakers sounded victorious and full of promise.  To Lenny Curry, the mayor of Jacksonville, the long and squat rectangular factory represented “the opportunity for Jacksonville to become a major player in solar technology