APsystems QS1A Installation/User Manual
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4. APsystems Microinverter System Installation
4.4 Installation Procedures
4.4.1 Step 1 - Verify the grid voltage to match with microinverter rating
4.4.2 Step 2 - Install the AC bus cable
a. The AC bus is installed at a position matching the microinverter location.
b. One end of the AC bus is connected to the mains via the junction box.
c. Wire the conductors of the AC bus:
L1 - BLACK ; L2 - RED ; PE-GREEN(LATAM Region)
L - BROWN ; N - BLUE
；
PE - YELLOW GREEN(Brazil Region).
Wiring colour code can be different according to local regulations, 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 an issue is not covered by the warranty.
Forbidden to hand carry the inverter through AC cable.
Figure 2
4.4.3 Step 3 - Attach the APsystems Microinverters to the racking
a. Mark the location of the microinverter on the rack, taking into acount the position of
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. When installing the microinverter, make sure the
grounding washer is facing the racking.
Figure 3
Prior to installing any of the microinverters, verify that the utility Voltage at the point of
common connection matches the voltage rating on microinverter label.
Do not place the inverters ( including DC and AC connectors) with direct exposure to the
sun, rain, or snow. Allow a minimum of 2 cm of space around the microinverter case for
heat dissipation and proper air flow. The racking used to fix the microinverter should be
reliably grounded.
grounding washer
Warning injure hand
