Capacitor cell based energy storage system with array of switches

The present disclosure provides an energy storage system, device, and method of operating thereof. The device includes multiple capacitor cells, e.g., encapsulated capacitor cells, connected in series. A MOSFET-based, cross-point switch can be connected to the individual capacitor cells to manage balancing. Sensors can monitor the individual capacitor cells and provide data to a processor that determines instructions for the array of switches and individual capacitor cells. The capacitor cells can include capacitors based on solid-state dielectrics. A method of charge balancing, e.g., charge balancing with the energy storage device or system, can include sending instruction to a digital control port embedded within each capacitor cell.