On March 28, Eastern Time, the U.S. Department of Commerce said it would launch an investigation that may lead to anti-circumvention investigations into solar products imported from Malaysia, Thailand, Vietnam and Cambodia. The specific timetable is: 1) Beginning on March 28, US time, the US Department of Commerce began to conduct an anti-circumvention investigation on solar products imported from...
Solar storage system, including solar modules, controllers, inverters, batteries, loads and other equipment. At present, there are many technical routes, but the energy needs to be collected at a certain point. At present, there are mainly two topologies of DC coupling "DC Coupling" and AC coupling "AC Coupling". 1, DC coupling As shown in the figure below, the DC power generated by the photovolta...
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...
The nominal voltage of the lithium iron phosphate battery is 3.2V, the high end charge voltage is 3.6V, and the low end discharge voltage is 2.0V. Due to the different quality and process of positive and negative electrode materials and electrolyte materials used by various manufacturers, there will be some differences in their performance. Take 12.8V100AH for example: 1. Lithium iron phosphate ba...
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...
In general, we call the process of converting DC power into AC power as inverter, the circuit that completes the inverter function is called inverter circuit, and the device that realizes the inverter process is called inverter equipment or inverter. Why are common grid-connected inverters only single-phase and three-phase? In fact, the main reason is the type of grid connected to the inverter. Fi...
To ask "What is the most feared problem of photovoltaic power generation?" Experienced people must know "the problem of shadow occlusion." 1. Small shadows, big hazards Because the position of the sun changes with the seasons and time, and the surrounding potential obstructions also change over time, anyone with experience in installing photovoltaic power plants understands that shadows are ...
In the photovoltaic power station system, the grounding design is a crucial part of the electrical design, which is related to the safety of the power station equipment and personnel. Good grounding design can ensure that the power station is in a safe operating environment for a long time, reduce the frequency of faults, and improve the overall operating efficiency of the power station. Therefore...
The power generation of a photovoltaic power station not only depends on the power generation performance of the photovoltaic power station itself, but also is closely related to the later operation and maintenance. Correct operation and maintenance can not only increase the power generation, but also greatly improve the service life of the equipment and power station. Let's discuss the main facto...
The power generation of photovoltaic power plants is determined by many factors, among which the key factors are irradiance and ambient temperature. Hot summer is often accompanied by high temperature, not high irradiance. The temperature characteristics of solar modules are negative temperature coefficients, and the power generation performance of modules will decrease as the temperature increase...
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