How to choose the cable in photovoltaic power generation systems?

A, solar power generation system in the choice of cable mainly consider the following factors: 1, the insulation performance of the cable; 2, cable heat-resistant flame-retardant performance; 3, cable moistureproof, prevent light; 4, cable laying way; 5, the type of cable core ( Copper core

first, solar power generation system in the choice of cable mainly consider the following factors: 1, the cable insulation performance; 2. Heat resistant and flame retardant cable; 3, cable moistureproof, prevent light; 4. Cable laying methods; 5. The type of cable core ( Copper, aluminum core) ； 6, cable size. Second, the connection between the different components of solar photovoltaic power generation system, due to the environment and the different requirements, the selection of the cable is different also. Different technical requirements of connecting parts as follows: 1) The connection between the components must be UL test, heat resistance is 90 ℃, acid resistance, chemical resistance, moisture resistant and exposure to resistance. 2) The connection between the finger and phalanges can open air or buried, require moisture, prevent exposure. Suggested by pipe installation. The pipe must be heat resistant to 90 ℃. 3) You can use the connection of the battery and inverter more root pass UL test of soft wire, or use by UL test welding machine cables. 4) House wiring, Dry environment) Can use the shorter DC link. Third, the cable size design, must follow the following principles: 1) For short distances between battery and indoor equipment dc connection, choose the rated current of the cable for cable calculation of continuous current of 1. 25 times. 2) For ac load connection, selected the rated current of the cable is a cable in calculating the maximum continuous current of 1. 25 times. 3) For inverter connection, selected the rated current of the cable is a cable in the calculation of maximum continuous current of 1. 25 times. 4) For square matrix and internal connection between the square matrix, selected the rated current of the cable is a cable in the calculation of maximum continuous current of 1. 56 times. 5) Considering the influence of temperature on the cable performance. 6) That should not be more than 2% of the voltage drop. 7) Choose the appropriate cable specification based on two factors: the current intensity and the circuit voltage loss. Complete calculation formula is: line loss length x x = current circuit bus voltage coefficient of cable voltage coefficient can be obtained from cable manufacturer.