The Cat® Power Grid Stabilization Heavy Duty (PGS HD) module is a scalable, rapidly deployable, mobile energy storage system using Lithium Ion batteries, Cat® BDP1000 inverter and Cat® Microgrid controller. The PGS HD integrates with solar or other renewable sources to provide short duration power when the renewable source is not available. The PGS HD also provides reserve power to optimize generator set operation. The system may provide temporary backup power to facilities in the event of a power outage.