connectors are a type of single contact connector
commonly used for connecting photovoltaic panels.
MC4 stands for "Multi-Contact" with a
4mm2 contact assembly pin. They are UL rated at
20 ampere and 600 volt maximum, dependant on the
conductor size used.
small solar panels, commonly used for battery charging,
may not require special connectors, larger terrestrial
arrays for power generation involve higher currents
and voltages and place special demands on both cables
and connectors for safe operation. The MC4 connectors
incorporate a flexible watertight seal and are supplied
as 'male' and 'female' types to minimise the chance
of wrong connections. For proper seal, they require
usage with the correct diameter cable, normally
double-insulated (insulation plus black sheath)
and UV resistant (most cables deteriorate if used
outdoors without protection from sunlight). Connection
is by use of a special crimping tool.
MC4 solar connectors current is as following:
1. If using 10AWG PV cable,both of our MC4 and Amphenol
can be suitable for 40A~44A;
For 12AWG,it is 30A;
For 14AWG,it is 20A
arrays of panels are commonly interconnected as
series strings of panels generating 17 to 34 V each,
with overall series string voltages up to 600 V,
and isolation requires a special DC disconnect designed
to open the circuit without arcing damage
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