4 RM (4 mm²) DC Solar PV Cable – High Current Copper Wire for Solar Systems
The 4 RM (4 mm²) DC Solar PV Cable is a high-performance, heavy-duty copper wire specifically designed for solar power systems in Bangladesh. It provides a safe, reliable, and durable DC connection between solar panels, charge controllers, inverters, and battery banks. Whether for residential, commercial, or small industrial solar setups, this cable ensures maximum efficiency and long-term performance.
Overview
In modern solar energy systems, choosing the right cable is crucial for system safety, efficiency, and durability. The 4 RM DC Solar PV Cable is engineered to meet the demanding requirements of solar installations. With a cross-sectional area of 4 mm², this cable is capable of carrying moderate DC current while minimizing voltage drop, ensuring that your solar system operates smoothly.
Its flexible and robust construction makes installation simple, while its high-quality insulation protects against environmental factors like UV radiation, heat, and humidity, which are common in Bangladesh. This makes the 4 RM solar cable ideal for both indoor and outdoor applications.
Key Features
-
Conductor Size: 4 RM (approximately 4 mm²)
-
Material: 99.9% pure copper for high conductivity
-
Voltage Rating: 600/1000V DC, suitable for all standard solar PV systems
-
Current Capacity: 35–40A (depending on installation distance and conditions)
-
Insulation: Double-layer PVC/XLPE, UV resistant, flame retardant for maximum safety
-
Durability: Designed to withstand heat, moisture, and harsh outdoor conditions in Bangladesh
Applications
The 4 RM DC Solar PV Cable is highly versatile and can be used in multiple solar system applications:
-
Solar Panel Connections: Efficiently connects solar panels to MPPT or charge controllers.
-
Battery Bank Connections: Provides reliable DC connection for small to medium-sized battery banks.
-
Inverter Wiring: Ideal for linking inverters with solar panels or battery banks.
-
Hybrid and Off-Grid Systems: Can be used in hybrid setups where solar energy storage is required.
-
Residential & Commercial Systems: Suitable for homes, offices, factories, and small commercial solar systems.
Advantages of 4 RM (4 mm²) Solar Cable
-
High Reliability: Ensures a stable and safe DC connection throughout your solar installation.
-
Durable Construction: Double-layer insulation protects against UV rays, high temperatures, and humidity.
-
Flexible and Easy Installation: The cable is lightweight and flexible, making it easy to route and install.
-
Reduced Voltage Drop: Optimal thickness ensures minimal voltage loss over short distances.
-
Cost-Effective Solution: Provides reliable performance at an affordable price, making it ideal for residential and commercial solar installations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Conductor Size | 4 RM ≈ 4 mm² |
| Conductor Material | 99.9% Pure Copper |
| Voltage Rating | 600/1000V DC |
| Max Current | 35–40A (short distance) |
| Insulation | Double Layer PVC/XLPE, UV Resistant, Flame Retardant |
| Application | DC Solar PV, Battery Bank, Inverter |
Installation Tips
-
Ensure correct polarity when connecting solar panels and battery banks.
-
Avoid sharp bends and kinks to maintain the cable’s performance and longevity.
-
Use appropriate connectors for DC solar applications to prevent energy loss.
-
For long-distance DC connections, consider increasing cable size to reduce voltage drop.
-
Keep the cable away from extreme heat sources and direct mechanical stress.
Why Choose 4 RM (4 mm²) DC Solar PV Cable?
The 4 RM DC Solar PV Cable is the ideal choice for small to medium solar systems due to its combination of performance, durability, and affordability. Its high-quality copper conductor ensures efficient current flow, while the double-layer insulation provides long-term protection against harsh weather and UV exposure. It is fully compatible with standard solar panels, MPPT controllers, battery banks, and inverters, making it a versatile solution for a wide range of solar applications.
Whether you are installing a residential rooftop solar system, a small commercial solar project, or a hybrid solar setup, this 4 RM cable guarantees reliable performance and safety. Its design and construction meet international quality standards, ensuring that your investment in solar energy is protected for years to come.
Conclusion
The 4 RM (4 mm²) DC Solar PV Cable is a premium-quality, durable, and safe cable that delivers reliable performance for all DC solar applications in Bangladesh. Its high conductivity, heavy-duty insulation, and robust design make it a dependable choice for connecting solar panels, inverters, and battery banks. Ideal for residential, commercial, and small industrial solar setups, this cable ensures long-lasting, efficient, and safe operation of your solar energy system.
Invest in 4 RM DC Solar PV Cable today and ensure a reliable, high-performance solar installation with long-term durability and minimal maintenance.


