Electricity storage devices are widely expected to become the must-have add-on to electricity systems increasingly supplied by intermittent renewables. As battery technology has rapidly come down in price, deployment to provide fast-delivery ancillary service has reached saturation. The future value of batteries will increasingly be determined by revenues from other markets. This viewpoint sets out the economics of these markets and explains how pricing in alternative markets can be derived and how ECA models the resulting revenue streams for batteries… READ ECA VIEWPOINT HERE