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Solar Technology related terms beginning with J.
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- Joule : A metric unit of energy or work; 1 joule per second equals 1 watt or 0.737 foot-pounds; 1 Btu equals 1,055 joules.
- Junction : A region of transition between semiconductor layers, such as a p/n junction, which goes from a region that has a high concentration of acceptors (p-type) to one that has a high concentration of donors (n-type).
- Junction Box : A photovoltaic (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.
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