Solar fundamentals
Industry Term

Jbox (Junction Box)

A Junction Box (commonly referred to as JBox) is the box or connection point on the backside of a PV module (solar panel).

What does Jbox (Junction Box) mean?

A Junction Box (commonly referred to as JBox) is the box or connection point on the backside of a PV module (solar panel).

Why does Jbox (Junction Box) matter in a solar project?

This term helps explain how a PV system is designed, installed, monitored, or operated. A clear definition keeps owners, installers, and inspectors speaking the same solar dialect.