APsystems Microinverter System Installation
4.3 Installation Procedures
4.3.1 Step 1 - Verify that grid voltage is matching with microinverter rating
4.3.2 Step 2 – Y3 AC Bus Cable distribution
a. Each connector drop of the AC Bus cable shall be matching the position of the microinverter.
b. One end of the AC bus cable is used to access the junction box into the power grid.
c. Wire the conductors of the AC bus: L - BROWN ; N - BLUE；PE - YELLOW GREEN.
Wiring color code can be different according to the local regulation. Check all the wires of the installation
before connecting to the AC bus to be sure they match. Wrong cabling can damage irreparably the
microinverters: such damage is not covered by the warranty.
It is strictly prohibited to hand carry the microinverter by its AC cable.
4.3.3 Step 3 - Attach the APsystems Microinverters to the Racking
a. Mark the location of the microinverter on the rack, with respect to the PV module junction box or any
other obstructions.
b. Mount one microinverter at each of these locations using hardware recommended by your module
racking vendor.
Figure 2
Install the microinverters (including DC and AC connectors) under the PV modules to avoid direct exposure
to rain, UV or other harmful weather events. Allow a minimum of 1.5 cm (3/4’’) below and above the casing
of the microinverter to allow proper air flow. The racking must be properly grounded as per local electrical
code.
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