A PV DC combiner is an electrical device used in photovoltaic systems to combine multiple PV strings into a common DC output. It is used to collect the direct current generated by the solar cells and send it to an inverter for further use or distribution.
The functions and characteristics of a DC combiner may vary depending on specific system requirements and installation needs. Here are some important aspects of a DC combiner:
Connections: The DC combiner has several inputs to connect photovoltaic panels or DC sources. Each input a separate fuse or switch to protect each solar panel individually.
Power management: The DC combiner may have a capacity to handle high current and voltage generated by the solar cells. It should be able to handle the total current from all connected solar cells and feed it to the common DC output.
Safety and protection: A DC combiner is equipped with fuses and circuit breakers to protect the system against overcurrent or short circuits. These protective measures are important to ensure safe operation and minimize the risk of electrical accidents or damage to the equipment.
Monitoring and control: Some advanced DC combiners may also have built-in monitoring and control functions. This may include monitoring current levels, voltage levels and temperatures, as well as the ability to communicate with higher-level control or monitoring systems.
DC combiners are an important component of the PV system, as they enable the efficient and safe management of the DC current generated by the PV cells. It is important to select and install the right type and capacity of DC combiner to suit the specific PV system and its requirements.