Photovoltaic panel junction box location diagram

What is a photovoltaic junction box?

Most photovoltaic junction boxes have diodes. The function of the diodes is to keep the power flow going in one direction, and prevent power from feeding back into the panels when there's no sunshine. A quality PV junction box is certified (e.g. via TÜV) and regulates the heat and offers reliable long-term safety.

What is a PV module junction box?

PV Module's junction boxes with the IP67 protective level, can provide the safety protection for cable and wiring connection, also for contact protection of non-insulating electric parts. Each module has two individual wires connecting the junction box, one is negative pole and the other is positive pole.

How to connect a solar panel to an array?

With the use of a junction box, it becomes easy to connect the solar panel to array. Usually cables with MC4 / MC5 connectors at the end are used. A good junction box keeps corrosion at the terminals to a minimum, as it will exclude water coming in. When purchasing solar modules, always have a look at the IP rating of the PV junction box.

Can a LONGi Solar module junction box be mated together?

Make sure all connectors are fully locked. Only connectors as the compatible model from same vendor can be mated together. Any doubt, please consult LONGi customer service personnel. LONGi solar module junction box contains bypass diode which is in parallel connection with the cell string.

How to connect two modules in a junction box?

Each module has two individual wires connecting the junction box, one is negative pole and the other is positive pole. Two modules can be in series connection by inserting the positive pole at one end of wire of one module into the negative pole of the adjoining module.

Can PV modules produce DC current under sunlight?

PV modules can produce DC current under sunlight. Any contact of exposed metal at module's wiring parts may result in electrical shock or burn. Any contact of 30V or larger DC Voltage can be fatal. In case of no connected load or external circuits, modules can still produce voltage.