[deanCommie]

> Malta’s solution is to store electricity as heat in high temperature molten salt and cold in a low temperature liquid for days, or even weeks, until it’s needed. The key insight behind Malta is that electricity can be stored as heat in high temperature molten salt and cold in a low temperature liquid for days, or even weeks, until it’s needed.

Does nobody proof read these things before they get published?

[lawrenceyan]

The grammar is perfectly correct though I think?

Perhaps this portion is what confuses you: stores electricity as heat in "the form of a combination of a" high temperature molten salt and cold in a low temperature liquid. This would be an explicit wording which might help to clarify things, but is not used due to redundancy.

[deanCommie]

The 2 consecutive sentence both contain the identical LONG fragment "as heat in high temperature molten salt and cold in a low temperature liquid for days, or even weeks, until it’s needed"