What makes Cat® Energy Storage Systems (ESS) so special? Well, Cat ESS offerings include Power Grid Stabilization (PGS) and Energy Time Shift (ETS) modules with optional Energy Capacity Expansion (ECE). The systems feature flexible, scalable, and modular designs for a wide range of electric power distributed energy system applications, offering capabilities including generator set transient assist, grid integration and support, shifting of energy from time of generation to time of use, power sta