The U.S. could double its capacity for new wind and solar power, save billions of dollars and cut millions of tons of carbon-dioxide emissions from its generation fleets if federal incentives can be aligned to deploy a suite of technologies to unlock the full capacity of transmission grids. So says a new report from The Brattle Group, modeling the benefits of a set of "grid-enhancing technologies" across the wind-power-rich grids of Kansas and Oklahoma. According to its analysis, spending about $90 million to implement these technologies could yield a payback in less than a year, with annual power cost savings of about $175 million delivering ongoing benefits for years to come.