In the world of microgrids and distributed energy resources (DERs), a Power Stack is the strategic combination of multiple technologies—solar, storage, dispatchable generation, advanced controls, and even emerging solutions like fuel cells or linear generators—layered. In the world of microgrids and distributed energy resources (DERs), a Power Stack is the strategic combination of multiple technologies—solar, storage, dispatchable generation, advanced controls, and even emerging solutions like fuel cells or linear generators—layered. The iNVERGY INV-ESS 5. 12 kWh Stack-Mount is a highly versatile, compact, and stackable battery energy storage system designed for residential and light-commercial solar + storage applications. With a nominal energy capacity of 5. It can also charge 150 electric vehicles before its batteries run out.