The present disclosure discloses a detection method and apparatus for an inverter system and an inverter system. The detection method includes: obtaining output power corresponding to a target system connected to at least one load, where the target system is configured to supply power to the at least one load, and the target system includes a photovoltaic system; and performing arc detection on a faulty photovoltaic string in the photovoltaic system based on the output power and total power corresponding to the at least one load. The detection method for the inverter system of the present disclosure ensures stability of load operation during an arc detection process, mitigates an impact of a reduction in output power of the inverter system on the load operation, improves load performance and prolongs a service life of the load, reduces safety hazards caused by unstable operation of the load, and improves user experience.

A DC power system includes a first interface to a DC source and a second interface coupled to the first interface and to a load. A battery control system (BCS) has an input/output interface coupled to the first interface and to the second interface, and a series arrangement of switched controllable units of one or more battery cells, each switchably bypassable according to a control signal. The BCS selectively sources and sinks power to variably control a voltage at the input/output interface utilizing the plurality of switched controllable units under control of a BCS processor that produces the control signal. The BCS sources power from the switched controllable units to supply power to the load in addition to, or in lieu of, the DC source, and regulates performance of an external circuit by dynamic variation of the voltage at the input/output interface according to the control signal.

A system includes a breaker set, an inverter operatively connected to the breaker set, and at least one direct current (DC) voltage converter operatively connected to the inverter. A microgrid interconnection device (MID) can be operatively connected to the breaker set. A controller provides smart functionality for energy production, distribution, and control among residential sources and loads connected to the system. The controller, the breaker set, the MID, the inverter, and the at least one DC voltage converter can be housed within an enclosure.

Apparatuses, systems, and methods to balance flying capacitors in high power multi-level buck or boost converters for renewable and solar maximum power point tracking (MPPT) inverter applications are provided. An exemplary method includes initializing at least a multi-level converter circuitry and an isolated secondary converter circuitry, wherein the multi-level converter circuitry includes at least a flying capacitor, and wherein the isolated secondary converter circuitry is configured to charge the flying capacitor in accordance with a default operation state in response to initialization; determining that a voltage across the flying capacitor satisfies a threshold; and causing the isolated secondary converter circuitry to switch from the default operation state to an inactive state based at least in part on the voltage satisfying the threshold.

A converter allows a portable power storage system to be charged from an external DC power source, such as a vehicle's DC power outlet. The converter contains a DC-to-DC power circuit within a housing. This circuit receives a lower DC voltage from the external source and boosts it to a higher, regulated output voltage. A first connector links to the external source while a second connector, such as an MC4 or Anderson Powerpole, mates with the power storage system's solar panel inlet. The converter's output voltage and current are regulated to emulate a solar panel array's power-voltage characteristics, enabling the power storage system's existing charging circuitry to function without modification. The device may be bidirectional, allowing power to flow back to the vehicle for tasks like jump-starting. The system enhances versatility of portable power storage units by enabling charging from diverse DC sources when solar power isn't available.

Systems and methods are described herein for providing power for enabling electroluminescence imaging of photovoltaic panels. The system may comprise a diode in a power converter, where the diode may restrict reverse current flow to the photovoltaic panel. The system may comprise a power device configured to be coupled to a photovoltaic panel. The power device may comprise an auxiliary power circuit which may provide power to the power device from the photovoltaic panel or form a power source connected to a power system controller. The power device may control a switch to provide a current path for reverse current to flow to the photovoltaic panel. An imager may capture an image of the panel.

A method of optimizing control of a power plant includes receiving a request for power plant output power, receiving first power block data from a first power block, receiving second power block data from a second power block, determining an optimized set of power setpoints for one or more power block components of the first power block and the second power block, and setting the power setpoints for the one or more power block components of the first power block and the second power block based on the determined optimized set of power setpoints. The first power block and second power block can each include a PV system, a battery system, and at least one inverter. The optimized set of power setpoints can be based on the first power block data, the second power block data, and the requested power plant output power.

Systems, apparatuses, and methods are described for a power device in a power system. The power device may include a plurality of power stages, which may reduce the number of connectors needed for the power system. The plurality of power stages in the same power device may allow the power device to be configured with additional functionalities.

An inverter, an inverter control method, and a system. When the plurality of direct current boost circuits operate in a maximum power point tracking (MPPT) state, if input voltages of n direct current boost circuits in the plurality of direct current boost circuits are each greater than or equal to a first threshold, a controller controls switching transistors in m direct current boost circuits in the n direct current boost circuits to remain turned off. m and n are integers greater than 0 with nm. The first threshold is greater than or equal to a minimum voltage limit of the direct current bus.

A power control system includes a pluggable power source (PPS) junction box operable to receive and aggregate power from one or more energy sources. The system includes a PPS controller operable to control an enable signal and provide the power to an energy storage device or direct load device. The system includes a PPS interface operable to communicate the power from the PPS junction box to the PPS controller and communicate the enable signal from the PPS controller to the PPS junction box. The PPS controller controls the enable signal responsive to at least (i) an amount of power available from the one or more energy sources and (ii) an amount of energy stored at the energy storage device or required to supply the direct load device. The PPS interface communicates the power from the PPS junction box to the PPS controller based on the enable signal.