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5.10.2.5 Connection of inputs
Connect all the strings required by the system, always checking the seal of the connectors.
ATTENTION – A If any string inputs is not required check that protective caps are installed to the relative unused connectors. This is
necessary for the inverter seal and to avoid any damage to the unused connectors which may be used at a later time.
ATTENTION – A The quick fit connectors must be properly installed. After the installation make sure the connectors are correctly
locked through the clips.
ATTENTION – A The connections can also be made with the wiring box detached from the power module that can be connected later
for commissioning. When working with the wiring box detached, pay particular attention to:
- presence of ground connection (10)/(25)
- the top of wiring box must always be protected in outdoor installations with proper IP66 protection covers (optional accessory
content in “PVS Installation Kit”, to be ordered separately). Refer to the dedicated “Installations of IP66 protection covers for
wiring box openings” paragraph for further information about the installation procedure.
NOTE – D Notes on the system sizing - Decisions on how to structure a photovoltaic system depend on a series of factors and
considerations, such as the type of panels, the space availability, the future location of the system, energy production goals over
the long term, etc. A configuration program that can help to correctly size the photovoltaic system is available on the Fimer website
(http://stringsizer.fimer.com).
NOTE – D When configuring DC input and during the installation it’s needed to follow one basic rule to avoid possible output power
derating: All MPPTs shall be populated connecting at least TWO string per each and configuration needs to be as much possible
homogenous . Considering to connect 20 strings, proceed connecting same number of strings per MPPT and then connect the
remaining strings in the selected MPPTs ( 4 MPPTs with 3 strings + 2 MPPT with 4 stings).
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