Darfon MIG300, Руководство по установке, Страница: 5 / 28

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M I G 3 0 0 M I C R O I N V E R T E R I N S T A L L A T I O N M A N U A L
PRE-INSTALLATION
Thank you for choosing Darfon’s MIG300 micro inverter as a key component to your solar power system.
Review and follow the instructions in this section before installing Darfon MIG300 micro inverters.
PV System Layout
The optimal PV array layout will need to be planned before installation. The layout/plan will affect the
wiring and cabling schemes and will need to be adjusted accordingly. The layout will also need to account
for the constraints of the distance between each PV module due to the connectors on the trunk cable and
the distance between the micro inverters and PLC box.
• The maximum cable distance from the PLC box to the farthest MIG300 is 50m (164’).
• It is ideal to tap power from the center of the circuit. So 2 segments of 12 modules for each circuit.
This maximizes the communication signal strength to the PLC box.
• The use of a RS485 specific cable is recommended, such as Belden 3105A; however, any twisted pair
cable can be used, such as CAT5, with some degradation of signal and distance.
Parts and Tools
This section provides a list of equipment and tools needed for installing and setting up the PV system.
Equipment for Micro Inverter Installation
- Sealing caps (for unused T-branch connectors)
- AC trunk cable (with T-branch connectors)
- AC connector removal tool
- End Caps (used at the end of each AC branch circuit)
Equipment for Monitoring System Installation
- Data Logger (Includes AC Adapter, RS485 Connector, Wall-Mounted Frame and Ethernet Cable)
- PLC Box (Includes RS485 Connector)
- Red/Black Wiring for RS485
Other Tools/Equipment
- Outdoor-rated AC junction box(es)
- Cable clips and/or tie wraps
- Gland/strain relief fittings (on per AC junction box)
- Torque wrench & sockets for mounting hardware
- Adjustable/open-ended wrench (for end caps)