Solair World

Difference Between Solar Cable And Normal Cable

If you use our links to purchase something, we may earn a commission. Learn more.

Solar cables and normal cables both serve specific functions that meet different electrical needs.

Normal cables are more commonly used in general electrical applications, while solar cables are specifically utilized in solar energy systems.

One of the key advantages of solar cables over normal cables is their ability to withstand the harsh environmental conditions in solar energy systems.

Solar cables are manufactured specifically to withstand the harsh environment and are designed to resist UV radiation, high temperatures, and weathering and ensuring long-term reliability and safety, whereas normal cables may break over time and cannot withstand these conditions.

Another key difference between solar cables and normal cables lies in their electrical properties.

Solar cables offer lower resistance to electrical current than normal ones, helping solar energy systems operate more efficiently.

Furthermore, solar cables typically feature insulation materials free from toxic substances like halogens or others, ensuring they’re more environmentally friendly.

The differences between solar cables and normal cables highlight the importance of using the appropriate cable for each specific application.

By selecting the most appropriate cable for your solar energy system, you can ensure its operation efficiently and safely for years.

Major Difference Between Solar Cable And Normal Cable

Solar cables and normal cables are designed for specific electrical applications and significantly differ in construction and properties.

Below are the major differences between solar cables and normal cables:

Environmental Resistance

Solar cables are engineered to withstand the extreme environmental conditions that characterize solar energy systems, including UV radiation, high temperatures, weathering, and corrosion.

Conversely, standard normal cables may not withstand these conditions over time and may degrade.

Electrical Properties

Solar cables differ significantly from normal cables due to their low resistance to electrical current, making them more suitable for solar energy systems.

Conversely, normal cables offer greater resistance against the current flow and are intended for general electrical applications.

Insulation Material

Solar cables typically use insulation materials free of toxic substances like halogens that are more eco-friendly.

On the contrary, traditional normal cables may use materials containing halogens that could harm the environment.

Size and Length

Solar cables differ in size and length according to their specific applications, typically being smaller and shorter to fit more closely within solar energy systems than normal cables.

On the other hand, normal cables tend to be longer for general electrical uses.


Solar cables may cost more than normal cables due to their specific design and construction. However, the cost of solar cables is often justified by their superior performance in solar energy systems.

Solar cables and normal cables have significant differences in their design, construction, and properties.

It is, therefore, essential to fully comprehend these variations when selecting the suitable cable for an electrical application.

Is It Acceptable To Use Normal Cables For Solar Panels?

Solar cables are necessary for the optimal functioning of solar panels, as normal cables are not designed to last indefinitely.

The National Electrical Code mandates specific installation guidelines prohibiting the use of normal cables.

Choosing the appropriate solar cable, such as PV wire or USE-2 cables, is essential for the safe and effective operation of solar panels.

These solar cables are engineered to withstand harsh environmental conditions, including UV radiation, high temperatures, and weathering, ensuring long-term reliability and safety.

Proper cable selection can guarantee optimal performance and longevity of solar panels. Therefore, selecting the appropriate cable type is crucial to ensure the efficient and safe operation of solar panels for an extended period.

Which Types Of Wire Are Commonly Used In Solar Farms?

When it comes to solar power systems, selecting the appropriate wire is critical to ensuring efficient and safe operations.

To interconnect PV modules in solar farms, there are two common types of wires utilized: PV wire and USE-2 wire.

Grounded arrays can use both types of wires, but for ungrounded ones, only PV wire is appropriate.

PV wire is engineered for interconnecting PV modules and can withstand up to 90°C in wet and 105°C in dry conditions. This type of wire is rated at 600 V and has a sunlight-resistant jacket.

On the other hand, USE-2 wire is rated for direct burial and can withstand harsh outdoor conditions, making it a great choice for solar panel systems.

However, it is not recommended for use near any power source. It is essential to consult with a qualified electrician to ensure that the right wire is chosen for your solar panel system.

What Are The Technical Considerations When Choosing Solar Cables For A Solar Panel System?

When it comes to the DC cable power supply circuit for solar panels, typically two-core solar cables are used, although single-core solar PV cables can be used as needed.

When it comes to extreme temperatures, such as temperatures above 100℃ or temperatures below -20℃, it is not recommended to use PVC insulated cables.

When solar PV cables are under greater pressure, or there is a risk of mechanical damage, 0.6/1kv low-voltage steel tape armoured power cables are preferred when laying cables directly.

Another crucial consideration is ensuring that the cable core temperature remains within the permissible limits determined by the cable’s service life when subjected to the maximum working current.

If the solar PV cables are laid in the cable trench or air, it is recommended to consider the average value of the highest temperature in the hottest month and day.

Considering these factors can help ensure that the solar panel system operates optimally and safely.

Can A 2.5 MM Cable Be Utilized For Solar Panels?

It is recommended to use a 2.5mm² cable for solar panels with a capacity of 150W or less and a panel-to-controller cable length of 5m or less.

However, if the length is greater, then a 4mm² cable is more appropriate.

Following this guideline is crucial to ensure the cables can handle the electrical load without overheating or causing any safety issues.

Additionally, it’s important to note that they should not be under electrical load when connecting or disconnecting solar connectors.

This is because it can cause arcing, damage the contacts and potentially lead to safety hazards. Solar panels can operate efficiently and safely by using the appropriate cable size and taking necessary safety precautions.