Within solar industry, we're seeing continued refinements of its existing technologies, driving down manufacturing costs and improving performance. A lot of potential exists within improving what we already have.
A number of new photovoltaic materials are in the early stages of development. These are things that, for instance, can be made into paints or can be printed with 3-D printers. These things hold a great deal of potential but are several years away from being commercialized. Those are both with regard to power conversion or power harnessing.
Also there's power electronics, which forms the interface between the generation, the grid, and the network. We've got things like energy storage, which can lend a lot of services to the grid, and then other technologies that do voltage regulation, frequency regulation, grid stability. They take what currently is a generation technology and make it an integral part of how the grid operates and provide services that are required today, even in the absence of these technologies.