WPD’s Roger Hey says the company learned from a domestic energy storage project that “we are not the right organisation to have that deep engagement with [domestic] customers. But more than 80% of the power is for big users anyway so that’s the obvious place to start. We may want flex from domestic customers but we would contact them through an intermediary – the utility, or Bosch, Panasonic or Toyota. [Otherwise] we would have to completely transform the business to a point where we would have to be energy suppliers”.