PV Module Installation Instructions
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measurement value should be equal to the sum of the open-circuit voltage of a
single module and you will find the rated voltage in the technical specification of
the type module you are using.
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Low voltage troubleshooting. Identify the normal low voltage and fault low voltage.
The normal low voltage mentioned here refers to the decrease of the open circuit
voltage of the module caused by the temperature increase of the solar cell or the
decrease of the irradiance. Fault Low voltage is usually caused by improper
terminal connection or bypass diode damage.
Blocking Diode and Bypass Diode Troubleshooting
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Blocking diodes could prevent current from flowing from the battery to the module
when the module is not generating current. If you do not use the charge controller,
it is recommended to use blocking diodes. About charge controller, please consult a
professional dealer.
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In the system, hot spot effect occurs when part of the module is blocked and other
parts are exposed to the sunshine and thereby lead to overheat of the battery and
damage the module. Using bypass diodes in the module protects the module from
being affected by this excessive reverse current. All modules those rated power are
more than 55 watts have a bypass diode integrated in the junction box.
On-grid Electrical System
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Try to use the same modules in a photovoltaic system with maximum number of
the modules.
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（N）=V（max）/[Voc(atSTC)]
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Several modules in series, and then form a PV array in parallel, which is
particularly suitable for high voltage situations. If the modules are connected in
series, the total voltage is equal to the sum of the voltages of the individual
modules.
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In the case of using high current, you can put several PV modules in parallel, the
total current is equal to the sum of the current of each module.
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The module can provide prefabricated connectors for system's electrical
connections. As for cable size, type and temperature and other parameters’ choice,
please refer to the relevant rules.
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The cable cross-section surface and connector’s size must meet the maximum
system short-circuit current, otherwise the cables and connectors will overheat
because of excessive current and has the danger of burning!
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When installing, the junction box’s one end to be upward to avoid being rained.
