Germany’s sonnen introduced a scheme a while back in which customers pay a flat, reduced rate for their electricity each month while the company aggregate their batteries together to benefit the grid – and now the offer has been extended to electric vehicle owners.

New value propositions which will radically change the way energy is generated and used by end-customers are already accelerating energy storage market growth. Julian Jansen of Delta-ee takes a look at three distinctive types of business model which are taking shape.