Photovoltaic DC cables are mainly used for power transmission on the DC side of solar photovoltaic power generation systems. Core applications include module series connection, string parallel connection, combiner box connection, and inverter connection.
Depending on the system structure and laying environment, specific application scenarios are as follows:
Series Connection Between Modules: Photovoltaic DC cables are used to connect multiple solar panels in series to form a string, thereby increasing the output voltage. In this scenario, the cables need to be exposed to the outdoors for extended periods, enduring sun, rain, ultraviolet radiation, and drastic temperature changes.
Parallel Connection Between Strings and with DC Distribution Boxes (Combiner Boxes): Multiple strings are connected in parallel via DC cables to combine current and transmit it centrally to the combiner box. This part of the cable is usually laid on outdoor supports or the ground and needs to have good weather resistance, aging resistance, and moisture resistance.
Connection Between DC Distribution Boxes (Combiner Boxes) and Inverters: The combined DC power is transmitted through cables to the inverter for AC-DC conversion. This section of cable involves long transmission distances and high power, requiring low line loss and high conductivity stability. Specialized photovoltaic cables such as PV1-F are recommended to ensure system efficiency and safety.
Distributed and Commercial/Industrial Photovoltaic Power Stations: In rooftop photovoltaic and distributed industrial/commercial power stations, DC cables are widely used to connect arrays and inverter equipment. Due to complex installation environments (such as sharp roof edges and high-temperature surfaces), the cables also need excellent mechanical strength and high-temperature resistance (up to 125℃).
