Aspects of the subject technology relate to methods and systems for recommending an energy storage device. In some aspects, a method of the subject technology can include steps for aggregating consumption data for a customer, receiving energy production data for each of a plurality of energy production sources, and determining a utilization efficiency score for each of the plurality of energy storage devices based on the consumption data and the energy production data. In some aspects, methods of the subject technology can also include steps for ranking two or more of the energy storage devices based on the utilization efficiency. In some aspects, machine-readable media are also provided.

A method for estimating a SOC of a battery electrically coupled to at least one of a load or a power source includes detecting, by a voltage sensor, voltages of the battery. The method further includes determining, by a processor, an average voltage of the battery by averaging the detected voltages of the battery over a predetermined period of time. The method further includes determining, by the processor, a present operating state of the battery based on at least one of the detected voltages of the battery. The method further includes determining, by the processor, a present SOC of the battery based on the present operating state of the battery and the average voltage of the battery. The method further includes transmitting, by the processor, the present SOC of the battery to an output device for outputting the present SOC of the battery.

A Remote Monitoring and Control System (RMCS) for an electrical power system includes a control/communication module and a test apparatus. The test apparatus includes electrical power system test components electrically coupled in or to an automatic transfer switch of the electrical power system and the control/communication module. The test components are operable by the control/communication module for controlling, monitoring, assessing, and testing one or more functions of the electrical power system. A method of assessing a backup power system includes: coupling electrical power system test components to an automatic transfer switch of the backup power system; communicatively coupling the electrical power system test components to a control/communication module; and operating the electrical power system test components to measure or test conditions in the backup power system. The RMCS can provide seamless 24/7 monitoring coverage and control capabilities to enhance system performance and reliability.

A rapid shutdown (RSD) control circuit includes: a RSD controller having first and second terminals coupled to first and second terminals of a photovoltaic cell module, respectively; a transistor having a gate coupled to the RSD controller, a source coupled to the second terminal of the photovoltaic cell module, and a drain; and a diode coupled between the drain of the transistor and the first terminal of the photovoltaic cell module. In a normal state, controlled by the RSD controller, the transistor is controlled to have a first impedance state and the photovoltaic cell module outputs an output power to an inverter. In a shutdown state, controlled by the RSD controller, the transistor and the diode are controlled as a variable impedance, and thus a voltage between the first terminal and the second terminal of the photovoltaic cell module is regulated to a desired voltage.

Nodes within a wireless mesh network are configured to monitor time series data associated with a utility network, including voltage fluctuations, current levels, temperature data, humidity measurements, and other observable physical quantities. The nodes execute stream functions to process the recorded time series data and generate data streams. The node is configured to transmit generated data streams to neighboring nodes. A neighboring node may execute other stream functions to process the received data stream(s), thereby generating additional data streams. A server coupled to the wireless mesh network collects and processes the data streams to identify events occurring within the network.

A power system model parameter conditioning tool including a server control processor in communication with phasor measurement unit monitored data records of multiple disturbance events, a model calibration unit providing event screening, power system model simulation, and simultaneous tuning of model parameters. The model calibration performing a simulation using default model parameters, the processor comparing the simulation results to the monitored data. If the prediction is within threshold, then terminating conditioning; else performing parameter identifiability analysis to determine differing effects of various model parameters on power system model accuracy, selecting a parameter set causing a degradation in power system model prediction, and updating the default model parameters corresponding to members of the parameter set with values selected to reduce the degradation. A method and a non-transitory computer readable medium are also disclosed.

Various implementations power homes and businesses without needing to connect to electric utility company-provided power, i.e., they can operate off-grid. Generally the systems includes solar panel racks (e.g., photovoltaic cells on sheets stabilized using ballasts, anchors, or mounting) that generate electrical power used to provide power to a building or that is stored on batteries. The system includes the solar panel racks and an enclosure to be installed at the premises and separate from the building. The enclosure includes the batteries and inverters that are electronically connected to the solar panel racks and batteries. The inverters are configured to convert direct current (DC) electricity from the solar power racks and batteries to alternating current (AC) electricity to provide power to the building via wires electrically connecting the inverters to the main panel of the building.

A control device which controls the power of a plurality of apparatuses in a home network, and a method thereof are provided. The control device includes an input unit which receives a power off command, and a control unit which concurrently turns off apparatuses which are currently turned on among the plurality of apparatuses in response to the power off command received by the input unit. Therefore, it is possible for a user to concurrently turn off currently running apparatuses so user convenience can increase.

The present invention is directed to device and method for monitoring power input to a networked device The device includes a housing; an optional power converter configured for AC to DC, AC to AC or DC to DC conversion; a controller enclosed in the housing and configured to send one or more notifications and receive one or more instructions from a remote server; a relay operably coupled to the controller; a first circuit electrically connecting the power converter to power mains; a second circuit electrically connecting the power converter to the relay; and a third circuit electrically connecting the relay to the networked device, wherein the controller is configured to determine alternating current status on the first circuit and a direct current status on the second circuit or the third circuit.

Systems, methods, techniques and apparatuses for configuring load shed controllers are disclosed. One exemplary embodiment is a method comprising providing a graphic user interface on a computer display; providing first, second, third, and fourth graphic resources on said graphic user interface; checking whether said load shedding controller meets minimum operating requirements to operate; if said load shedding controller meets said minimum operating requirements, transmitting configuration information including at least first and second configuration values to said load shedding controller; and controlling, with the load shedding controller, the one or more of the electric loads based on the first and second configuration values. The third graphic resources assist a user in providing first configuration values to configure grid operating parameters. The fourth graphic resources assist a user in providing second configuration values to configure load operating parameters.