8 | SAMLEX AMERICA INC.
sectIOn 3 |
connector system for connecting solar Panels
output Wires and Connections on the Solar Panel
fig. 3.3 shows the output wires and connections on the solar panel. The output wires from the junction box
of the solar panel are terminated with the help of MC4 connectors. The Positive (+) wire is terminated with
a MC4 female Connector (marked "+") and the Negative wire is terminated with a MC4 Male Connector
(marked "-").
WARninG!
When the surface of the solar panel / array is exposed to sunlight, a DC voltage appears at the output
terminals turning it into a live voltage source. for example, a 24V nominal solar panel my put out
an open circuit voltage of around 45VDC that may produce electrical shock. Multiple solar panels
connected in series (to increase the output voltage) will put out higher lethal voltages To avoid any
electrical shock hazard during installation, make sure that the solar panel / array is covered with an
opaque (dark) material to block solar irradiation.
extending to the output Wires of the Solar Panel (Fig. 3.3)
Male MC4 mating
connector marked (-)
Male MC4 mating connector
marked (-) for Positive (+)
PV Extension Wire
Female MC4 mating connector
marked (+) for Negative (-)
PV Extension Wire
Female MC4 mating
connector marked (+)
To Charge
Controller
Caution!
*1.
Note that the Positive (+) extension wire has
a male MC4 mating connector marked (-) that
mates with the female MC4 mating connector
marked (+) on the Positive (+) wire of the panel.
*2.
Similarly, the Negative (-) extension wire has
a female MC4 mating connector marked (+) that
mates with the male MC4 mating connector
marked (-) on the Negative (-) wire of the panel.
*2
*1
Fig 3.3. Connecting extension wires to the output wires of solar panel
