The PV junction box: An overlooked, yet important part of a solar panel

By Kelly Pickerel The junction box is often an overlooked piece of the solar panel. Usually pre-installed on the backside of a solar module, installers pay it little mind until connecting panels.
The PV junction box has a simple, but important role: housing all the electric bits on a solar panel and protecting them from the environment. Wires connect to diodes inside, providing an easy way to link panels together.
Although solar developers and owners don’t get a choice in junction box type—module companies work out those contracts during manufacturing—the role of this enclosure is still important to understand, especially as it houses more “smart”

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