What is the Advantage and Disadvantage of Solar Cable
Introduce the Types, Advantages, and Disadvantages of Solar Cables
1. Traditional type.
Structural features: There is an opening on the back of the casing, and there is an electrical terminal (slider) in the casing, which electrically connects each busbar strip of the power output end of the solar cell template with each input end (distribution hole) of the battery. The solar photovoltaic cable passes through the corresponding electrical terminal, the cable extends into the casing through the hole on one side of the casing, and is electrically connected with the output terminal hole on the other side of the electrical terminal.
Advantages: clamping connection, fast operation and convenient maintenance.
Disadvantages: Due to the existence of electrical terminals, the junction box is bulky and has poor heat dissipation. Holes for solar photovoltaic cables in the housing can lead to a decrease in the waterproof function of the product. Wire contact connection, the conductive area is small, and the connection is not good enough.
2. The sealant seal is compact.
Advantages: Due to the welding method of sheet metal terminals, the volume is small, and it has better heat dissipation and stability. It has good waterproof and dustproof function because it is filled with glue seal. Provide a sensitive connection scheme, according to different needs, you can choose two methods of sealing and unsealing.
Disadvantage: Once a problem occurs after sealing, maintenance is inconvenient.
3. For glass curtain wall.
Advantages: Because it is used for low-power photovoltaic panels, the box is small and will not affect indoor lighting and aesthetics. It is also the design of the rubber seal, which has good thermal conductivity, stability, and waterproof and dustproof function.
Disadvantage: Due to the selection of the brazing connection method, the solar photovoltaic cable extends into the box body through the outlet holes on both sides, and it is difficult to weld to the metal terminal in the slender box body. The structure of the junction box adopts the form of an insert, which avoids the inconvenience of the above-mentioned processing.
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Post time: Jun-17-2022
Analysis of the Advantages and Disadvantages of Solar PV Cable Insulation Materials
The performance of insulating materials directly affects the quality, processing efficiency, and application scope of solar photovoltaic cables. This article will briefly analyze the advantages and disadvantages of commonly used solar photovoltaic cable insulation materials, aiming to discuss with the industry and gradually reduce the gap with international standards.
Due to the differences between various insulating materials, the production of wires and cables and wire processing come with unique characteristics. A comprehensive understanding of these characteristics will benefit the selection of photovoltaic cable materials and the control of product quality.
PVC (Polyvinyl Chloride) insulation material is a mixture of stabilizers, plasticizers, flame retardants, lubricants, and other additives added to PVC powder. Depending on the application and characteristics required for the wire and cable, the formula can be adjusted accordingly. Over decades of production and use, PVC manufacturing and processing techniques have become quite mature. PVC has a wide range of applications in solar photovoltaic cables:
1) The manufacturing technology is mature and easy to form and process. It is cost-effective and controllable in terms of surface finish, color difference, processing efficiency, hardness, adhesion, mechanical, physical, and electrical properties.
2) PVC insulation boasts excellent flame-retardant properties, easily meeting various standards.
3) Regarding temperature resistance, improvements in material formulas have led to the following types:
| Material Category | Rated Temperature (Maximum) | Application | Use Characteristics |
|---|---|---|---|
| Normal type | 105°C | Insulation and jacket | Customizable hardness, generally soft, easy to shape and process. |
| Semi-rigid (SR-PVC) | 105°C | Core insulation | Higher hardness than the normal type, hardness above Shore 90A. Enhanced mechanical strength and thermal stability but reduced flexibility. |
| Cross-linked PVC (XLPVC) | 105°C | Core insulation | Irradiation cross-linked to form stable thermosetting plastic, improving mechanical strength and short-circuit temperature capacity up to 250°C. |
4) It is generally used for voltages up to 1000V AC, making it suitable for various industries like household appliances, lighting, network communications, etc.
PVC also has some drawbacks:
1) High chlorine content results in dense smoke when burning, affecting visibility, and producing carcinogens and HCl gas, harmful to the environment. With advancements in low-smoke halogen-free materials, replacing PVC is a growing trend in cables.
2) Ordinary PVC has poor resistance to acids, alkalis, heat oils, and organic solvents, making it prone to damage. Despite this, PVC cables remain widely used due to their excellent processing performance and low cost.
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