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A: The limit of PV module working environment temperature range is -40 ℃ to 85 ℃, recommended in the temperature range of -20 ℃ to 50 ℃ environment installation, the temperature is the average monthly temperature of the installation location, the component installation of the altitude does not require, but need to consider the elevation of the Peo electrical equipment limitations.
2、What components need to be grounded when installing a PV system?
A: ①, it is recommended that all non-electrified metal parts and equipment shells in the PV power generation system should be grounded, such as solar modules, solar module brackets, inverter shells, grid-connected boxes, and so on. PV modules have prefabricated grounding holes, which can be directly connected in series for protective grounding, and the grounding end of the inverter can be directly grounded separately or in parallel with the base line of the grid-connected cabinet and grounded together.
②, the system is installed, before trial operation, insulation test should be carried out.
A: At present, the main materials for photovoltaic stents are aluminium alloy (AL6005-T5 surface anodic oxidation), stainless steel 304, galvanized steel parts Q235 hot-dip galvanized, of which stainless steel material cost weather resistance, recyclable high value.
Aluminium alloy solar racking is generally used in civil buildings on the roof photovoltaic system applications, aluminium alloy has corrosion resistance, light weight, beauty and durability, but its bearing capacity is low, and can not be applied to large-scale solar power station projects. In addition, the price of aluminium alloy is slightly higher than that of hot-dip galvanised steel.
Galvanised steel photovoltaic racking performance is stable, the manufacturing process is mature, high bearing capacity, easy to install, widely used in civil, industrial solar photovoltaic and solar power stations.
4、How to extend the service life of PV racking?
A: Ground pv racking system, common ground photovoltaic system is generally used in the form of concrete bar (block) foundation. Solar photovoltaic racking design solutions to face the challenge of important features are weatherproof. The structure must be both reliable and able to withstand atmospheric erosion, wind loads and other external effects. Safe and reliable installation, with small installation costs to achieve the effect of use. Later reliable maintenance, these are important factors to consider when selecting the programme.
5、solar photovoltaic stent selection need to pay attention to what issues?
A: The selection of solar stent materials, installation methods, requires more rigorous calculations to determine. In addition, solar stent selection is also affected by the installation location factors, land, climate, environment and other factors. Post-operation and stent weather resistance is also one of the basis for selection.
