Billionaire industrialists Charles and David Koch.

After decades of false starts, solar power in America is finally poised for its breakthrough moment. The price of solar panels has dropped by more than 80 percent since President Obama took office, and the industry is beginning to compete with coal and natural gas on economics alone.

But the birth of Big Solar poses a grave threat to those who profit from burning fossil fuels. And investor-owned utilities, together with Koch-brothers-funded front groups like American Legislative Exchange Council (ALEC), are mounting a fierce, rear-guard resistance at the state level – pushing rate hikes and punishing fees for homeowners who turn to solar power. Their efforts have darkened green-energy prospects in could-be solar superpowers like Arizona and Nevada. But nowhere has the solar industry been more eclipsed than in Florida, where the utilities’ powers of obstruction are unrivaled.