A method for detecting a potential-induced degradation (PID) of PV modules of a PV installation includes operating a PV generator at a maximum power point (MPP), at a first generator voltage (U.sub.1) and first generator current (I.sub.1), and at a second generator voltage (U.sub.2) and second generator current (I.sub.2), where a first power (P.sub.1) at the first generator voltage (U.sub.1) is in a predefined first ratio V.sub.1=P.sub.1/P.sub.MPP and V.sub.1≤1, with the power (P.sub.MPP) at the maximum power point (MPP) of the PV generator, and where a second power (P.sub.2) at the second generator voltage (U.sub.2) is in a predefined second ratio V.sub.2=P.sub.2/P.sub.1 and V.sub.2<1, with the first power (P.sub.1) of the PV generator, and where a quantity Y that characterizes a progress of the potential-induced degradation (PID) is determined from the values of the voltages (U.sub.1, U.sub.2) and/or the currents (I.sub.1, I.sub.2).

A solar tracker system includes a support tube, a solar panel assembly connected to the support tube, and an active lock connected to the support tube. The active lock includes a housing defining a chamber and a seal. The seal prevents a flow of fluid through the chamber when the active lock is in a sealed state and allows the flow of fluid through the chamber when the active lock is in an unsealed state. The active lock further includes a locking system motor connected to the seal to transition the active lock between the sealed state and the unsealed state, a battery providing power to the locking system motor, and an antenna for receiving instructions controlling the locking system motor.

A photovoltaic power generation system and a method and a device for detecting an earth fault of a photovoltaic string. The controller obtains a terminal voltage of each photovoltaic string before voltage disturbance, where the terminal voltage is a voltage to earth of a positive electrode or negative electrode of the photovoltaic string; performs voltage disturbance on each photovoltaic string and obtains a terminal voltage of each photovoltaic string after the voltage disturbance; determines a photovoltaic string with an earth fault based on the terminal voltage of each photovoltaic string before and after the voltage disturbance; obtains a photovoltaic panel with an earth fault by using the terminal voltage and an output voltage of the photovoltaic string before the voltage disturbance, or obtains a photovoltaic panel with an earth fault by using the terminal voltage and an output voltage of the photovoltaic string after the voltage disturbance.

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.

The present disclosure provides a cooling system facilitating thermal management in a solar photovoltaic (PV) module. The cooling system includes an exhaust fan, operatively coupled to an outlet of a central air conditioning module, the outlet carries waste air from the central air conditioning module. A supporting structure is placed at a predefined distance in front of the exhaust fan to support one or more solar panels. The one or more solar panels are tilted at a predefined angle and a predefined azimuth configured to provide maximum surface area of the back units of the one or more solar panels. The exhaust fan is further configured to direct the waste air and surrounding air towards the back units of the one or more solar panels at a predefined temperature.

The present disclosure provides a cooling system facilitating thermal management in a solar photovoltaic (PV) module. The cooling system includes an exhaust fan, operatively coupled to an outlet of a central air conditioning module, the outlet carries waste air from the central air conditioning module. A supporting structure is placed at a predefined distance in front of the exhaust fan to support one or more solar panels. The one or more solar panels are tilted at a predefined angle and a predefined azimuth configured to provide maximum surface area of the back units of the one or more solar panels. The exhaust fan is further configured to direct the waste air and surrounding air towards the back units of the one or more solar panels at a predefined temperature.

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 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.

An automatic darkening filter with adaptive parameter adjustment includes: a welding arc intensity detection unit configured to provide a first signal for determining the welding arc intensity; a solar power supply module configured to provide electric energy for the welding arc intensity detection unit and provide a second signal for determining the ambient light intensity; and a CPU and a light valve, the CPU being configured to calculate a difference between the welding arc intensity and the ambient light intensity based on the first and second signals, and control the scale number of the light valve based on the difference. The automatic darkening filter can realize the automatic adjustment of the scale number, and in the adjustment process, the welding arc intensity signal can be revised based on the ambient light intensity, which can effectively ensure the accuracy of the final determination of the scale number.

A monitoring system that is configured to monitor a property is disclosed. The monitoring system includes a sensor that is configured to generate sensor data that reflects an attribute of the property; a solar panel that is configured to generate and output power; and a monitor control unit. The monitor control unit is configured to: monitor the power outputted by the solar panel; determine that the power outputted by the solar panel has deviated from an expected power range; based on determining that the power outputted by the solar panel has deviated from the expected power range, access the sensor data; based on the power outputted by the solar panel and the sensor data, determine a likely cause of the deviation from the expected power range; and determine an action to perform to remediate the likely cause of the deviation from the expected power range.