Choosing the right photovoltaic DC cable requires comprehensive consideration of voltage level, environmental adaptability, wire diameter, certification standards, and economic efficiency to ensure efficient, safe, and long-life system operation.
Define System Voltage and Current Parameters
The rated voltage of the photovoltaic DC cable should not be lower than the system's highest open-circuit voltage (usually DC 1500V or DC 1100V) to prevent insulation breakdown.
The cable's current carrying capacity should have a safety margin of 1.25 to 1.5 times the maximum operating current of the modules to prevent overheating and aging.
Prioritize Dedicated Models for Enhanced Weather Resistance
PV1-F-DC: The mainstream domestic model, temperature resistant from -40℃ to +125℃, strong UV resistance, suitable for module series connection and busbar connection.
H1Z2Z2-K: European standard model, double-sheath design, excellent aging resistance, suitable for high-temperature and high-humidity areas.
Avoid using ordinary PVC cables, as they have poor weather resistance, are prone to cracking outdoors, and have a lifespan of less than 5 years.
