APsystems DS3 Series Installation/User Manual
10
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 - The AC bus distribution
a. The AC bus is arranged at the proper position of the inverter.
b. One end of the AC bus access junction box into power grid.
c. Wire the conductors of the AC bus: L1 - BLACK ; L2 - RED
；
PE - GREEN.
Wiring colour code can be different according 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 an issue is not covered by the
warranty.
Forbidden to hand carry the inverter through AC cable.
4.4.3 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.When install microinverter, grounding washer must be
facing the racking.
Figure 2
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) Where exposed to the
sun, rain or snow, even gap between modules. Allow a minimum of 3/4’’(1.5cm.)
between the roof and the bottom of the microinverter to allow proper air flow.The
racking of install microinverter must be reliably grounding.
