Optimal orientation and inclination
◼ In order to achieve maximum annual power generation, the optimal orientation
and inclination of the PV module should be determined first. The maximum
amount of power is typically generated when the sun is directly above the PV
module.
Avoid shadows
◼ Even small shadows (such as dust) can cause a drop in power generation. If all
surfaces of the module are uncovered throughout the year, the module is
considered "no shadow". Ensure that the sun shines on the modules even on
the shortest day of radiation all through the year.
◼ EVA aging caused by frequent occlusion of modules and long-term heating of
the diode can affect the lifetime of the module.
5.1 Module wiring
Correct electrical wiring
◼ Check that the wiring is correct before starting the system. If the measured
open circuit voltage (Voc) and short circuit current (Isc) do not match the
specifications provided, there may be a wiring fault.
Correct connection of the MC4 connector
◼ Make sure the MC4 connector is secure and properly connected. The
tightening torque must be appropriate for the solar cables used. Typical values
are between 3.4 Nm and 3.5 Nm (refer to the connector supplier information
for specific connection steps). The connector should not be subjected to
external pressure. It is solely intended for electrical circuit connections and
should not be used to open or close circuits. Do not insert other metal objects
into the connector or attempt any other electrical connections.
◼ The MC4 connector should be kept dry and clean to prevent rain and moisture.
Avoid water soaking of the MC4 connector.
◼ The junction box and the connector shall not be in contact with organic
solvents, oily substances and other corrosive materials that may cause
functional failure, to avoid damage to the junction box and the connector. If
the junction box and connector are contaminated, they are forbidden to use.
Use appropriate materials
◼ In accordance with local fire, building, and electrical regulations, it is essential
to use specialized solar cables and connectors of the same brand and model as
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