On the 23rd local time, the Office of the US Trade Representative issued a statement announcing the re-exemption of tariffs on 352 items imported from China. The new regulations will apply to imports from China between October 12, 2021 and December 31, 2022. s product. Exempted items mainly include industrial components such as pumps and motors, auto parts, chemicals, backpacks, bicycles, v...
According to the latest annual clean energy statistics report released by the International Renewable Energy Agency (IRENA), the installed capacity of off-grid photovoltaic systems installed around the world has barely increased since the outbreak of theCOVID-19 in 2020. According to the report released by the agency, most of the countries that own and operate off-grid PV systems aroun...
What is a DC arc? Arc is a kind of gas discharge phenomenon, the instantaneous spark generated by the current passing through some insulating medium, such as air, this is the arc. Both direct current and alternating current produce arcs. Sometimes when we plug in the socket, we will see a fire, which is a kind of AC arc. In a DC system, such as that caused by a string of photovoltaic cells, this a...
The dust falling on the surface of the photovoltaic module will block the sunlight on the one hand, reduce the transmittance of the surface glass of the photovoltaic module, and reduce the amount of solar radiation irradiated on the surface of the solar panel; It absorbs solar radiation and converts it into its own heat energy, and at the same time blocks the external heat dissipation of the photo...
1 Photovoltaic connectors and power station benefits Usually, photovoltaic modules, inverters and combiner boxes are the main focus of daily maintenance of photovoltaic power plants, while the failure risk of some small components is easily overlooked, and photovoltaic connectors are the most representative cases. The photovoltaic connector accounts for less than 0.5% of the initial investment cos...
PID effect is Potential Induced Degradation. The direct harm of PID to the module is that a large amount of charge accumulates on the surface of the cell, which aggravates the passivation effect of the cell surface, resulting in a decrease in the fill factor, open-circuit voltage and short-circuit current of the cell, and the power of the cell module is attenuated, and the attenuation degree can r...
As the "heart" of photovoltaic power generation, the health of the inverter is closely related to the smooth operation of the photovoltaic power generation system. It is necessary to understand common inverter alarms and accurately determine the cause of inverter alarms. 1. Inverter alarms not caused by internal devices If the screen or APP shows that the EEPROM fails, it can usually be repaired b...
When designing the inclination of the photovoltaic array, there is a big difference between the grid-connected power station and the off-grid power station, because the goals pursued by the grid-connected power station and the off-grid power station are different when generating electricity. The goal of grid-connected power stations is to maximize the annual power generation, that is, the design o...