Nature Energy 2, 17017 (2017); published 9 February 2017; corrected 6 March 2017.

In the version of this Editorial originally published, references 6 and 10 were incorrect. The correct references are given below. These errors have been corrected in all versions of the Editorial.

6. Giberson, M. Nat. Energy 1, 16156 (2016).

10. Jaffe, A. M. Nat. Energy 1, 16158 (2016).