Abstract: The current invention is an intelligent distributed energy storage system for demand side power management. It provides a system that can store electric energy close to the point of use or close to the distributed production for use when demanded by the users. These storage nodes can communicate with a central clearing entity to negotiate if the nodes should buy energy for storage, provide energy to the user above a given power level, or sell power back to the grid. The function will depend on the amount of energy stored in the node, the cost of the electric energy, the cost of the electric peak power, the price of resold electrical energy and power, plus the local usage.

Abstract: A device may be connected to a power grid in order to perform beneficial functions for the end user and/or utility company such as backup power, power quality improvement, peak shaving of the electrical load, etc. The device may include energy storage devices, such as batteries, and intelligent hardware and software that control charging and discharging and that enable interactive communications.

Abstract: The current invention is a device connected to the power grid in order to perform beneficial functions for the end user and/or utility company such as backup power, power quality improvement, peak shaving of the electrical load, etc. Inside the device would be energy storage devices such as batteries, and intelligent hardware and software controlling charging, discharging and interactive communications.

Abstract: In the current invention, in order to increase efficiency of battery powered AC electricity supply, multiple inverter/battery modules are used in parallel but can be individually shut down. The number of inverters activated depends on the power usage. When only a little power is needed only one or a few inverters are activated. When more power is needed the battery inefficiency increases and more inverters will be activated.