A load control system may control an electrical load in a space of a building occupied by an occupant. The load control system may include a controller configured to determine the location of the occupant, and a load control device configured to automatically control the electrical load in response to the location of the occupant. The load control system may also include a mobile device adapted to be located on or immediately adjacent the occupant and configured to transmit and receive wireless signals. The load control device may be configured to automatically control the electrical load when the mobile device is located in the space. The load control system may further comprise an occupancy sensor and the load control device may automatically control the electrical load when the occupancy sensor indicates that the space is occupied and the mobile device is located in the space.

A battery system includes a plurality of battery packs that is connected, in parallel to one another, to an external system. The battery packs are connected, in parallel to one another, to the external system through corresponding DC-DC converters. A control device discharges a first battery pack by operating the DC-DC converters so as to supply electricity from the first battery pack to other battery packs. After the discharge of the first battery pack, the control device charges the first battery pack by operating the DC-DC converters so as to supply electricity from the other battery packs to the first battery pack. The control device calculates a full charge capacity of the first battery pack based on an integrated amount of a current that has been charged to the first battery pack.

In some implementations, a system may include a server equipped with a web application, where the web application is configured to detect a relocation of a network-enabled electric plug of network-enabled electric plugs from a first region to a second region based on changes in data communication patterns; the network-enabled electric plugs, each plug configured to deliver electricity from an electrical source to a powered device and capable of communicating with the server, and an access point intermediary facilitating communication between the network-enabled electric plugs and the server.

A method for determining a power source using a digital break-out box between a first energy source and a second energy source for powering a plurality of circuits by setting at least a first limit and a second limit, determining the state of charge of the power source, determining an available discharge energy, and classifying each circuit into categories. When the second energy source is in an unpowered state, the circuits that are to be powered by the first energy source are determined by comparing the available discharge energy to the first limit and second limit. When the second energy source is in a powered state, the circuits that are to be powered by the first energy source and the circuits that are to be powered by the second energy source are determined by comparing the current state of charge to the first limit and second limit.

A wireless power-driven household device for controlling an amount of power to be supplied to a load includes a wireless power transmitter configured to wirelessly transmit power via a transmitting coil, a receiving coil configured to wirelessly receive power from the transmitting coil of the wireless power transmitter, a rectifier configured to rectify an alternating current (AC) voltage received wirelessly, a direct current (DC) link configured to receive a DC voltage that is an output of the rectifier, a current sensor configured to sense current supplied from the DC link to the load, a switch provided between the rectifier and the DC link to adjust an amount of power to be supplied to the load based on the current supplied to the load and sensed by the current sensor, and a controller configured to control an on/off state of the switch.

A method includes determining a first voltage level of a first battery and a second voltage level of a second battery. Based on a difference between the first voltage level and the second voltage level satisfying a first threshold and a magnitude of a current failing to satisfy a second threshold, one of the first battery or the second battery is disconnected from the one or more components, and the one or more components of the portable device are powered using the other of the first battery or the second battery. Based on one or more of the difference between the first voltage level and the second voltage level failing to satisfy the first threshold or the magnitude of the current failing to satisfy the second threshold, the one or more components of the portable device are powered using the first battery and the second battery.