The use for load shifting was an add-on, intended to show that take-up of such batteries might not be the environmental positive that some assume.
My expectation remains that the market will consist of people naively thinking they can save money by either adding these to an existing solar system, or buying both a new solar system and the battery at the same time. This will be aided marketing types making misleading claims[*], and by the widespread lack of understanding of discounted cash flow.
Sylvia.
[*] With the usual barely legal small print weasel words.