This question is part of the Super Big Solar Panel FAQ from Solar Mango, where expert answers to over 100 important questions on solar panels are provided.


An electrical junction box is a container for electrical connections, usually intended to conceal them from sight and deter tampering.

In the case of the solar module junction box, the electrical connections from the solar panels will placed in the junction box.

The junction box is an enclosure on the module where the PV strings are electrically connected.


Super Big Solar Panel FAQGet to know answers to over 100 important questions on solar panels from here.


A solar panel’s junction box is attached to the back of the solar panel. It wires the connectors together and is the output interface of the solar panel.

The cables from a junction box transport the electricity from the solar panel to array junction box.

A good junction box keeps corrosion at the terminals to a minimum, as it will exclude water coming in.

Source Solar Mango Dictionary

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