Solar is unquestionably the future; not simply because it is becoming much more efficient and much cheaper, but because its productivity roughly tracks demand. Wind & tide whilst more or less predictable are just as inflexible as coal or nuclear, but storage in batteries or Hydro largely addresses the issue. And scaling of electric cars allows charging to take place overnight when there is productivity but no demand. With modern V2G technology these same electric cars can also support peaks on the grid the following morning