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PV section

The section of the wires in a solar photovoltaic installation.

ANNEX

The calculation of the drivers section
The section of the wires in a solar photovoltaic installation has to fit perfectly to the technical characteristics of the installation. Perform a calculation of the correct drivers section, it is essential because normally work with low voltages (12 or 24 V) and high intensities Failure to make a good sized drivers can be significant losses.
The value of the resistance of a conductor is calculated by the following formulas:

Ó (1)
Where:
R = Resistance = Resistivity
W
L = length in meters
S = cross section in mm2
= Conductivity (inverse of resistivity)

According to Ohm's law (2)
Substituting the value of R of the formula (2) in (1), it follows that:
After

Ó Generally the driver who Copper is used and the value of its resistivity is 0.01786. Si:

then
Being
finally the formula:
where:
S = section in mm 2 L = Length in m to the receiver I = current in A Va-Vb = Voltage drop in V