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DS3D Microinverter Quick Installation Guide

Step 1

Verify that grid voltage is matching with microinverter rating

Step 2

Y3 AC Bus Cable distribution

a. One end of the AC bus cable is used to access the junction box into the power grid.

b. Wire the conductors of the AC bus:L - BROWN; N - BLUE; PE - YELLOW GREEN(European 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.

ATTENTION: Do NOT carry the microinverter by the AC cable. This could lead to partial or complete

disconnection of the AC cable from the unit, resulting in no operation or poor operation.

Step 3

Attach the APsystems Microinverters to the Racking

a. Mark the location of each microinverter on the rack relative to the PV module junction box or any other

obstructions.

b. Install one microinverter at each of these marked locations using the hardware recommended by your module

racking vendor.

NOTE: Install the microinverters (including DC and AC connectors) beneath the PV modules to protect them from direct exposure to rain, UV, or other adverse weather conditions.

Leave a minimum of 1.5 cm (3/4 inch) space below and above the microinverter casing to allow proper airflow. The racking must be grounded in accordance with local electrical codes.

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.

Step 4

Ground the system

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.

Step 5

Connect the APsystems Microinverter to 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.

① Best Practice: Use the AC Bus Cable Unlock Tool to disconnect the connectors.

② NOTE: Cover any unused connectors with the Bus Cable Y-CONN to protect them.

Step 6

Install a Bus Cable End Cap at the end of AC bus cable

a. Strip cable jacket.

b. Insert the cable end into the seal.

c. Rotate the nut with 4-5N·m until the latching mechanism meets the base.

Step 7

Connect APsystems Microinverters to the PV Modules

When plugging in the DC cables, the microinverter should immediately blink green ten times. This will happen as soon as the DC cables are plugged in and will show that the microinverter is

functioning correctly. This entire check function will start and end within 10 seconds of plugging in the unit, so pay careful attention to these lights when connecting the DC cables.

NOTE: Each channel connects 2 PV modules in series (For PV modules with Voc<60V).The input channel will not work if connects to a single module(Voc<60V). That means the quantity of

PV modules in the system is even number.

WARNING: 1.Double check to make sure all of the AC and DC wiring has

been correctly installed. Ensure that none of the AC and/or DC wires

are pinched or damaged. Make sure that all of the junction boxes are

properly closed.

2.Each PV panel must be carefully connected to the same channel.Make

sure to not split positive and negative DC cables into two different input

channels: microinverter will be damaged and warranty will not apply.

3.Please ensure each DC cable's length within 3 meters.

Not supplied by Apsystems

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