APsystems DS3 Series Quick Installation Manual

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DS3 Series Microinverter Quick Installation Guide
Step 1. Verify that grid voltage is matching with microinverter rating

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
Standard); or L1 - BLACK; L2 - RED; PE - GREEN(American Standard).
NOTE: 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.

Step 3. Attach the APsystems Microinverters to the Racking

NOTE: 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.
NOTE: It is strictly prohibited to hand
carry the microinverter by its AC cable.
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.

Step 4. Ground the system

Y3 AC Bus cable has an embedded PE wire: this might be sufficient to ensure proper grounding of the
whole PV array. However in areas with special grounding requirements, external grounding work may
still be needed, using the grounding lug supplied with the Microinverter.
Connect the APsystems microinverter to AC bus cable
Step 5.
Insert the microinverter AC connector into the trunk cable connector. Make sure to hear the "click" as a
proof of robust connection.
Click
:L - BROWN; N - BLUE; PE - YELLOW GREEN(European
Grounding lug
Best Practice: Use the Bus Cable Unlock Tool
of AC Bus to disconnect the connectors.
1 2021/08/26 Rev1.1 Quick Installation Guide