It's an exciting time for the solar industry. Deployment is up sharply — photovoltaics (PV) alone have seen 73 percent annual growth, on average, from 2000 through 2012, and costs are down dramatically over that same period. And now, storage technologies are poised for similar growth and cost-reduction trajectories as many new competitors enter the market. Lux Research, for example, projects that storage technologies integrated with solar will grow from a market of less than $100 million in 2013 to close to $2 billion by 2018.