Solar panels on rooftops of our houses are becoming increasingly common. Suppose the panels have surplus energy on a day to meet your household needs and excess energy is most likely to get wasted. Imagine a electricity grid in which you can feed in the excess energy from the solar panel to the grid and get paid for it from the utility companies. Or you run an industry and require to know energy consumption pattern in real time of your unit so that you are able to optimize it to save costs. Such a scenario is bound to become a reality in coming years as smart grids are adopted across the world.
