Updated by David Roberts on August 13, 2015, 9:00 a.m. ET
How can we get more wind and solar power integrated into energy grids?
Meeting the long-term challenge — getting to, say, 75 percent of renewable electricity or higher — will require technological innovation and sustained declines in cost. It’s exciting to think about. But in the short term, the barriers facing wind and solar are rather more pedestrian. They are regulatory and managerial, embedded in the rules and customs that now govern the operation of grids and energy markets. (I have written about these boring but important issues before.)
