“Getting More Wind and Solar is 100% Possible, But Not 100% Straightforward. Here’s Why”
"With wind and solar prices beating the cost of fossil-fuel generation in many places, we have a great opportunity to replace and modernize our energy supply with more renewables—and we can do so reliably. The Union of Concerned Scientists congratulates grid operators who have demonstrated that replacing old generation with wind and solar does not cause reliability problems. In the United States and in Europe, grids have run without coal, and with wind at 60% of the total mix. The director of reliability assessment of the North American Electricity Reliability Corporation has stated that with planning, any level of renewables on the grid could work."