Yes, during normal grid operation, Orison can power any device on any circuit in the house. The stored electricity is available to all circuits, not just the one an Orison is plugged into. When discharging, Orison replaces the flow from the grid by sending power back into the house wiring.
As electricity is pulled not pushed when Orison starts discharging to meet your energy demands, it replaces the grid energy. When an appliance is demanding energy (amperage), Orison intelligently supplies energy to that load wherever it needed in the house, for example, a running refrigerator in the kitchen.