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Easy to maintain mono photovoltaic module 610w is the smallest combination of solar cells with an encapsulated and internally connected, indivisible device capable of supplying DC power individually, also known as a solar module.
In a photovoltaic power generation system, several photovoltaic modules are connected in series to form a circuit unit with a certain DC output voltage, referred to as a module string or string.
Several PV modules are mechanically and electrically assembled together in a certain way and have a fixed support structure for DC power generation units, also known as PV arrays.
The special bracket designed for placing, installing and fixing the PV modules in the PV power generation system, referred to as bracket.
Monocrystalline silicon photovoltaic module is a photovoltaic module made of high-purity monocrystalline silicon rods.
Polycrystalline silicon photovoltaic module is a solar module made up of polycrystalline silicon high-efficiency solar cell wafers arranged in different strings and parallel arrays, which are composed of EVA film, tempered glass, lightweight electroplated aluminum alloy and so on.
The attenuation rate refers to the percentage reduction of the amplitude of the tuned fluctuation after each fluctuation cycle, that is, the ratio of the difference between the amplitude of the previous wave and the amplitude of the next wave to the amplitude of the previous wave of two neighboring waves in the same direction.
Hidden crack is a defect in the cell. Crystalline silicon cells are very susceptible to rupture due to the inherent characteristics of the crystalline structure. Crystalline silicon module production process is long, many links may cause hidden cracks in the cell, the essential reason for hidden cracks can be summarized as the mechanical or thermal stresses generated on the silicon wafer.
The azimuth angle of a PV module is the angle between the projection of the normal to the plane of the PV module and the south direction.
The tilt angle of a PV module is the angle between the plane of the PV module and the horizontal plane.
A bracket in which the azimuth and tilt angle of the PV module square array do not change with the sun’s moving trajectory.
PV module array azimuth and tilt angle of at least one of the bracket with the sun’s trajectory and change.
The conversion efficiency of a photovoltaic module is the percentage of the maximum power output of a photovoltaic module that is illuminated by light to the total radiant power incident on that photovoltaic module.
Under certain conditions, a PV module that is shaded in a series branch circuit will be used as a load to consume the energy generated by other PV modules, and the internal resistance of the shaded PV module increases and heats up, which is the hot spot effect.
The hot spot effect will cause part of the energy generated by the PV module to be consumed by the shaded PV module, which will lead to the failure of the PV module power attenuation or even the direct burning of the PV module. The hot spot effect will cause the voltage of the PV string circuit to decrease, and the decrease in circuit voltage will lead to a decrease in the power of the PV string, and the early withdrawal of the inverter from the grid, which will directly affect the power generation.
When the PV module needs to be decommissioned, first disconnect the DC fuse or circuit breaker of the corresponding branch circuit of the PV module string, and then disconnect the plug of the corresponding PV module.
The role of anti-reverse charging diode in PV module is to avoid the inverter and other equipment to give the PV module reverse current due to the PV module array not generating electricity or short-circuit faults in cloudy, rainy and night time.
(1) PV module installation should be in accordance with the design and specification.
(2) PV modules are categorized and strung according to voltage and current parameters.
(3) The appearance of the PV module and the terminal box and plug should not be damaged.
(4) The connection between the indirect ground of the PV modules and the grounding system of the PV module array is firm and reliable, and the grounding resistance of the PV module array shall meet the design requirements.
(5) The number of PV modules and the way of series and parallel connection shall meet the design requirements.
(6) The connection between the PV module string and external cable is reliable.
(7) The material of PV bracket, foundation, and installation of buried parts shall meet the design and specification requirements.
(8) The PV module is intact and the surface is clean.
(9) The open-circuit voltage deviation between the same PV module strings under the same test conditions shall not be greater than 2%, but the maximum deviation shall not exceed 5V.
(10) The insulation resistance of the positive and negative lines of the PV module is in accordance with the regulations, and there is no grounding condition.
(11) The wiring of each branch circuit of PV module is firm, no loose phenomenon, the voltage to ground is normal, there is no reverse connection, leakage connection, no grounding.
(12) Easy to maintain mono photovoltaic module 610w and convergence box connected to the communication module and other devices is normal, no grounding.
(13) The upper level convergence box can work normally, no abnormal situation.
