New York Times: Tucked away in this former tin-mining town, past the small farms of banana trees and oil palms, is one of the solar industry’s best-kept secrets. The six factories here with cavernous rooms up to one-third of a mile long constitute the production backbone of First Solar. Working alongside minivan-size robots adapted from car assembly plants and other industries, 3,700 employees produce five-sixths of the American company’s solar panels. Workers in Ohio make the rest. The list of manufacturers is…