APsystems DS3 Series - 4.4.1 Step 1 - Verify the grid voltage to match with microinverter rating; 4.4.2 Step 2 - The AC bus distribution; 4.4.3 Step 3 - Attach the APsystems Microinverters to the Racking

APsystems DS3 series User manual
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4. APsystems Microinverter System Installation
4.3.4 Step 4 - Grounding the system
There are three ways to connect grounds on the APsystems DS3:
① Y3 AC Bus cable has an embedded PE wire to ground the inverters in the AC circuit box.
② If the rack is grounded, the grounding washer on the inverter could create a tight bond onto the rack as a
ground connection. This is also a solution to ground the rack through inverter when the inverters are grounded.
③ If an external connection is necessary, an external wire can be bonded to the grounding lug on the exterior of
the inverter and connected to ground.
4.3.5 Stpe 5 - Connecting the APsystems Microinverter to the AC Bus Cable
Insert the microinverter AC connector into the trunk cable connector. Ensure you hear the “click” sound as
evidence of a secure connection.
Click
grounding washer
(Warning injure hand)
Thoroughfare
Tip
When flush-mounting photovoltaic modules on the rooftop, ensure that the DC connectors, antenna, and
LED indicator of the microinverter are facing outwards. This arrangement facilitates monitoring of
indicator status and ensures optimal communication quality.
①
③
②