Storage could be a solution for sure. Compressed air has been discussed, and I think there are a couple real examples. There's a Wikipedia article on it. A couple projects are mentioned in the History section. The issue I understand with compressed air is heat. It gets hot when compressed, and that heat energy is lost. Then when decompressed, heat needs to be added. In a way, storage can be thought of as generation capacity. The system today works on intermittent energy supply (e.g. coal train deliveries a few times a week) that can be stored (pile of coal) and converted to electric energy on demand (by burning it in a boiler). Doing the same with wind or solar (intermittent energy supply), pumped into storage (whether air, batteries or hydro dams) and converted on demand (storage output) essentially provides the same functionality.