J
Joule (J)
Unit of energy equal to 1/3600 kilowatt-hours.
Junction
The border between the semiconductor areas with opposed polarities. It is called “homojunction” if the semiconductors are equals; “heterojunction” if they are different.
Junction box
PV generator junction box is an enclosure on the module where PV strings are electrically connected and where protection devices can be located, if necessary.
Junction diode
A semiconductor device with a junction and a built-in potential that passes current better in one direction than the other. All solar cells are junction diodes.
