If you are planning to get a solar panel system at home, it’s good to understand first the cables and wirings used in solar panel units for your safety. First of all, before you can start generating renewable solar energy, you need wirings and cables to connect all the components of your solar panel system together. The type and size of cables are also important to consider.
For today’s article, we will explain what battery cables are and the different types of solar cables.
What are Battery Cables?
A battery cable is a cable used to power your solar panel system. A solar photovoltaic system will not work without the use of cables and wiring to connect the solar panels to the solar battery and to the other system components. An inter-module cable is used to connect solar PV modules to each other while the controller-to-battery wiring connects the controller to the solar battery or battery bank. The output cables then connect the solar array to a controller or usually an inverter, in the case of off-grid systems.
Typically, battery interconnect cables and battery to inverter cables are necessary for any system with batteries. If you want to make your own battery cables, you need crimping cable & wire tools. In addition to wiring between solar PV modules and solar batteries, and between the solar battery bank and inverter, you are required to use wiring from the combiner box to the battery bank or sometimes known as the home-run.
Solar cable is made up of several insulated wires wrapped with an outer jacket. Solar professionals use them to interconnect solar PV modules to solar batteries, and to other components of a solar power system. They can handle high temperatures, high UV radiation, and have weather resistance features. Typically, these cables are installed outside or within the solar arrays.
When it comes to cable sizes, the diameter depends on the number of conductors it contains. Mostly, the classification of solar cables is based on the number of their wires and gauge. Generally, there are three common types of cables used in a photovoltaic system. These cables are DC solar cables, solar DC main cables, and solar AC connection cables.
Types of Solar Cable
DC solar cables are either module or string cables. These cables are usually single core copper cables with insulation and sheathe. They are used within the solar panels and usually go with suitable connectors. These solar cables are pre-built into the PV modules, so replacement is not recommended.
These solar cables are either single or two-core power collector cables made to connect the positive and negative cables from the generator junction box to the solar power system’s central inverter. Main DC cable comes in a variety of sizes, usually 2mm, 4mm, and 6mm.
- AC connection cable
The AC connection cable is responsible for connecting the inverter to its protection equipment and the electricity grid.
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Before you connect those solar cables and wirings you should know what cables you are using and when they should be connected to avoid problems and damage to your solar power system. Understanding all the types and functions of each cable and wire is essential for a safe and code-compliant system.