At the Philadelphia Navy Yard, a battery that helps to improve the quality and reliability of the electric grid was brought online. This battery uses a special control system to inject or draw energy from the grid based on a signal from a utility.
The battery is part of the new GridSTAR Smart Grid Experience Center being developed at the Philadelphia Navy Yard and will initially help to maintain the frequency of the AC power on the grid. In the future, the battery could be used to help smooth out solar photovoltaic energy produced at the Navy Yard and also reduce peak demand energy costs.