A DC-coupled photovoltaic power generation system, an operating state switching method and device of the DC-coupled photovoltaic power generation system are provided according to the present disclosure. The method includes: obtaining photovoltaic energy of the DC-coupled photovoltaic power generation system and determining whether the photovoltaic energy is sufficient, in a case that the DC-coupled photovoltaic power generation system operates in a grid-connected battery priority state; and if it is determined that the photovoltaic energy is insufficient, performing an online switchover operation, where the online switchover operation is used to switch the operating state of the DC-coupled photovoltaic power generation system from the grid-connected battery priority state to a nighttime battery discharge state.

The present disclosure relates to curtailment control technology for photovoltaic power generation, and more particularly, to a gridforming type curtailment control system and method in link with a photovoltaic inverter. According to the present disclosure, inertia control that cannot be performed in existing photovoltaic inverters may be performed more continuously in link with a gridforming inverter, thereby having an effect of efficiently managing and utilizing existing photovoltaic inverter facilities.

This application provides a direct current converter, including a first BUCK circuit, a second BUCK circuit, a charge pump circuit, a drive circuit, a controller, and a power conversion circuit. A photovoltaic module is connected to the power conversion circuit. The power conversion circuit is connected to an inverter. A direct current output by the power conversion circuit is converted into an alternating current via the inverter, and the alternating current is connected to a power grid. The direct current converter implements maximum power point tracking of the photovoltaic module. The first BUCK circuit provides a first power supply for the drive circuit, and provides a power supply for the charge pump circuit. The charge pump circuit provides a second power supply for the drive circuit. The second BUCK circuit provides a power supply for the controller.

A power system may comprise a plurality of power sources, each connected to a corresponding power device. The power devices may be connected in series or in parallel. Each power device may comprise input terminals connected to the corresponding power source, output terminals, and a power circuit (e.g., 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. The change the operational characteristics may be used to estimate reserved power of the system.

A shutdown device control method, system and apparatus, and a shutdown controller. If the shutdown controller detects that an input voltage of the shutdown controller is reduced, when the input voltage of the shutdown controller is reduced to a preset protection voltage but has not been reduced to an undervoltage protection threshold voltage, the shutdown controller controls the shutdown of a shutdown device connected to a power supply photovoltaic assembly that supplies power to the shutdown controller, so that a bypass diode connected to the power supply photovoltaic assembly bypasses the power supply photovoltaic assembly, so that the power supply photovoltaic assembly only supplies power to the shutdown controller. After the shutdown device connected to the power supply photovoltaic assembly is shut down, the power supply photovoltaic assembly cannot output any voltage to a photovoltaic inverter apparatus, but voltages outputted by the power supply photovoltaic assembly are all supplied to the shutdown controller to ensure the normal operation of the shutdown controller, thereby ensuring that photovoltaic assemblies, other than the power supply photovoltaic assembly, among photovoltaic assemblies corresponding to the shutdown controller still output voltages to the photovoltaic inverter apparatus, and avoiding large fluctuations in the voltage of the photovoltaic inverter apparatus.

An auxiliary power supply for an energy storage rack of a high-voltage DC system. The power supply has at least one AC power supply branch with input terminals, transfer terminals and a low voltage transformer. The low voltage transformer has an input branch configured for receiving AC electrical power from the input terminals, a transfer branch configured for transferring the AC electrical power to the transfer terminals, and s a supply branch configured for transforming the received AC electrical power to a lower voltage in extra low voltage range for supplying a control unit. The power supply also has at least one DC power supply branch that includes an LV DC power source configured for supplying DC electrical power to the control unit. Also an energy storage rack and a energy storage system.

A secure apparatus and method for harvesting, validating, storing, and conditionally releasing physical resources are disclosed. The apparatus includes an environmental harvesting assembly configured to physically collect energy or other resources from multiple environmental domains, a conversion module that transforms the collected resources into a usable output, and a storage module that physically retains the output. A dual-meter validation module independently measures harvested or stored quantities to detect physical discrepancies beyond predefined tolerance thresholds. A hardware security module maintains sealed operational statesgts, performs cryptographic signing, and enforces encoded physical release conditions, including zeroization upon detection of tampering. A tamper-detection module identifies unauthorized physical access or modification. An escrow-validation engine restricts physical release of stored resources until cryptographically verified authorization, compliance, or continuity conditions are satisfied, enabling autonomous, tamper-resistant, and auditable physical resource control across distributed infrastructure.

A power converter analog chip includes a sampling circuit configured to collect electrical parameters of the power converter; a maximum power point tracking circuit configured to perform maximum power point tracking based on the input power or the output power obtained by the electrical parameters, and to obtain an adjustment signal; a rapid shutdown circuit configured to, when receiving a rapid shutdown instruction sent from the outside of the analog chip, generate a rapid shutdown signal; a protection circuit, configured to, when an electrical parameter of the power converter exceeds a first preset threshold, generate a protection signal and send the protection signal to the multiplexer; and a multiplexer configured to select one of the rapid shutdown signal, the protection signal, or the adjustment signal as a control signal, to control a power component in the power converter.

A modular solar-powered energy system for various electronic devices is disclosed. The system includes detachable solar panels, compact energy storage modules, articulated deployment mechanisms, and intelligent charge management circuitry. It enables complete or partial device operation from ambient light, reducing dependence on wired power. In various embodiments, portable devices integrate laminated or co-encapsulated solar-battery assemblies, while docking stations incorporate multi-axis adjustable panels, embedded rechargeable batteries, and interfaces for simultaneous multi-device charging. Intelligent control logic monitors light levels, charge status, and device priority to optimize energy distribution and extend runtime. Adaptive functions include automatic low-power transitions, user alerts under low-light conditions, and sensor-assisted solar alignment. Applicable to consumer electronics, wearables, grooming, safety, and IoT devices, the system provides a scalable, autonomous, and sustainable power solution that enhances device reliability and operational efficiency across diverse applications.

Provided is a power supply system. An all-in-one energy storage unit is connected to a grid-connected receptacle and an off-grid receptacle of a parallel socket. The parallel socket is connected to a fuel-powered generator. A bypass switch is connected between the grid-connected receptacle and the off-grid receptacle. When the power supply system is in an off-grid state and meets a load demand, the bypass switch is switched off; otherwise, the fuel-powered generator is controlled to start, and the bypass switch is switched on.