A power system may comprise a plurality of power sources, each connected to a corresponding power regulator. The power regulators may be connected in series or in parallel, and may form a string. Each power regulator may comprise input terminals connected to the corresponding power source, output terminals, and a power converter that may be configured to convert input power from the corresponding power source to output power. The power regulator may further comprise a regulator communications module that may be configured to receive a power regulation indication relating to regulating an operational characteristic of the power regulator. The regulator controller may be configured to instruct the power converter to increase or decrease the regulator operational characteristic based on the power regulation indication, and based on power production characteristics of the power regulator.

A solar powered charger assembly for charging batteries for cordless tools includes a housing that has a charging slot being integrated into the housing to insertably receive a battery from a cordless tool. A charging battery is positioned within the housing and the charging battery is in electrical communication with the charging slot. The charging battery charges the battery of the cordless tool when the battery for the cordless tool is inserted into the charging slot. A plurality of solar panels is each electrically coupled to the housing such that each of the solar panels is exposed to sunlight. Each of the solar panels is in electrical communication with the charging battery for charging the charging battery.

A solar powered charging assembly for charging electronic devices includes a housing that has a plurality of charge ports each integrated into the housing to insertably receive a charge cord of an electronic device. Each of the charge ports is structurally unique with respect to each other to accommodate a respective one of a plurality of proprietary charge cords. A battery is positioned within the housing and the battery is in electrical communication with each of the charge ports to charge an electronic device when a charge cord for the electronic device is plugged into one of the charge ports. A solar panel is coupled to the housing and the solar panel is in electrical communication with the battery for charging the battery.

An energy optimization system for a building includes a processing circuit configured to generate a user interface including an indication of one or more economic load demand response (energy) operation parameters, one or more first participation hours, and a first load reduction amount for each of the one or more first participation hours. The processing circuit is configured to receive one or more overrides of the one or more first participation hours from the user interface, generate one or more second participation hours, a second load reduction amount for each of the one or more second participation hours, and one or more second equipment loads for the one or more pieces of building equipment based on the received one or more overrides, and operate the one or more pieces of building equipment to affect an environmental condition of the building based on the one or more second equipment loads.

A metering and control subsystem for a photovoltaic solar system is configured for metering the photovoltaic solar system using current measurement devices and individually controlling relays to selectively energize photovoltaic branch circuits. In some examples, the metering and control subsystem includes photovoltaic branch connectors, a relay matrix, current measurement devices, and a metering and relay control circuit. The metering and control circuit is configured for metering the photovoltaic solar system using current measurement data from the current measurement devices and individually controlling the relays to selectively energize each photovoltaic branch circuit.

A string inverter control method includes: in a process of performing IV curve scanning on one or more first direct current/direct current step-up circuits, controlling a change of an output voltage of one or more second direct current/direct current step-up circuits on which the IV curve scanning does not need to be performed, where a change trend of the output voltage and a change trend of an input voltage of the one or more first direct current/direct current step-up circuits on which the IV curve scanning is performed present a non-strictly monotonically increasing relationship. Therefore, for the direct current/direct current step-up circuit on which the IV curve scanning is performed, a voltage difference between two ends of the direct current/direct current step-up circuit is not always in a relatively high state, so that a ripple current on an input inductor in the direct current/direct current step-up circuit can be reduced.

The present disclosure relates to an energy harvesting technology for generating electrical energy by using a combination of a solar cell and a thermoelectric device. An energy harvesting system according to one embodiment of the present disclosure may include a solar cell for generating electrical energy based on sunlight; a heat transfer layer formed on at least one edge portion of the upper surface of the solar cell on which sunlight is incident; and a thermoelectric device including a first electrode, a second electrode, a thermoelectric channel disposed between the first and second electrodes, having a horizontal structure in which the first electrode is disposed on the heat transfer layer to be arranged horizontally with respect to the solar cell, and configured to generate additional electrical energy based on the temperature difference between the first and second electrodes.

A river, tidal, wave or ocean current turbine, a wind turbine or a solar panel harnesses an optimum value of renewable energy from variable water flow or wind flow or from electromagnetic energy from sunlight harnessed by photovoltaic conversion to electricity. A harnessing module comprising a propeller facing, for example, water or wind flow and a generator driven by the propeller, thus may harness variable electric power from water (or wind) renewable energy and may be preferably connected to feedforward electricity source and preferably a feedback variable electrical load to an electrical voltage regulator apparatus of a land module and to a motor generator set or voltage converter by a flexible electrical cable for receiving a variable rotational speed converted to variable electrical frequency, the voltage regulator automatically providing a predetermined minimum electrical power/voltage output at constant frequency to the motor generator set or a voltage converter and output at constant frequency to a constantly varying grid load. The variable electrical input from harnessing modules is delivered to the voltage regulator and converted to a constant electrical frequency by the motor generator set. In alternative embodiments, the voltage regulator is replaced by a voltage regulator in series with a servo motor and a variable voltage transformer and, in a third embodiment, the voltage regulator is replaced by a power converter.

Example embodiments of systems, devices, and methods are provided herein for energy systems having multiple modules arranged in cascaded fashion for storing power from one or more photovoltaic sources. Each module includes an energy source and converter circuitry that selectively couples the energy source to other modules in the system over an AC interface for generating AC power or for receiving and storing power from a charge source. Each module also includes a DC interface for receiving power from one or more photovoltaic sources. Each module can be controlled by control system to route power from the photovoltaic source to that modules energy source or to the AC interface. The energy systems can be arranged in single phase or multiphase topologies with multiple serial or interconnected arrays. The energy systems can be arranged such that each module receives power from the same single photovoltaic source, or multiple photovoltaic sources.

The invention refers to a plug-in module for charging of batteries in an electronic device, comprising a pad-element configured to receive wireless input of electromagnetic energy; a chassis connected with the pad-element and provided with a plug connector which is configured to be plugged in a charging socket of the electronic device wherein the chassis comprises integrated energy transmission channels and a circuit board configured to transfer and convert the electromagnetic energy from the pad-element into a charging current provided at the plug connector.