Patent attributes
Disclosed herein are power management systems for controlling recorded electrical demand by isolating loads from a utility distribution grid connection. The loads are isolated when an energy storage system (ESS) is placed in series between the loads and the grid, with a charger that keeps the ESS from depleting and a power converter that provides energy to the loads from the ESS. A system controller may be enabled to manage the charging of the ESS by the charger relative to a consumption metric. In some embodiments, the loads are categorized, controlled, or curtailed by the controller and may be isolated from other loads. Some embodiments include bypass features or bimodal connections. Additional methods of control to prevent depletion of the ESS are also set forth. Systems herein can prevent or limit demand charges, protect the utility grid from backflow and other dangers, and raise the customer's effective utility service limit.
