Even just 20 years ago renewable generation was barely a blip on the national power grid, because they were so expensive as to be completely impractical. Our e

Even just 20 years ago renewable generation was barely a blip on the national power grid, because they were so expensive as to be completely impractical. Our era of affordable solar is less than a decade old. No demand for storage meant no activity in the market, hence the lag now that wind and solar have become so cheap that everybody can install it.