ABSTRACT
As photovoltaic (PV) systems grow at an exponential pace and head toward the goal of someday saturating the grid, energy storage systems are a natural fit for bottling sunlight for night time photon usage. An energy storage component similar to a fuel cell that stores its active materials in the form of two electrolytes external to the reactor interface. A system that has a solid connection or reference-ground between one of the current-carrying conductors and the equipment grounding system. A system that is not solidly grounded but has a low-resistance electrical reference to ground that maintains voltage to ground in normal operation. Article 480 Storage Batteries has been in the National Electric Code longer than we have been alive and Article 706 Energy Storage Systems is brand new. Article 706 will cover the higher voltage lithium battery modules that are being sold, flywheel storage, capacitor energy storage and compressed air storage.
