APsystems DS3D User manual

2022/08/04 Rev3.0 Quick Installation Guide
1
DS3D 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:L - BROWN; N - BLUE; PE - YELLOW GREEN(European 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.
Step 4. Ground the system
Step 5. Connect the APsystems Microinverter to AC bus cable
Step 6. Install a Bus Cable End Cap at the end of AC bus cable
Step 7. Connect APsystems Microinverters to the PV Modules
NOTE: 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.
WARNING: 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.
a
b
c
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ATTENTION: Do NOT carry the microinverter by the AC cable. This may cause the AC cable to partially or
fully disconnect from the unit, resulting in no or poor operation.
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.
M8 (Not supplied by
Apsystems)
grounding washer
(Warning injure hand)
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.
Insert the microinverter AC connector into the trunk cable
connector. Make sure to hear the “click” as a proof of robust
connection.
①Best Practice: Use the Bus Cable Unlock Tool of AC Bus to
disconnect the connectors.
Grounding lug
②NOTE: AC connector interface as follows.
③NOTE: Cover any unused connectors with Bus Cable
Y-CONN to protect the unused connectors.
From left to right are:
L-PE-N or L1-PE-L2.
②
③
①
Click
3.3N·m

2022/08/04 Rev3.0 Quick Installation Guide
2
WARNING: 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.
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 sysem is even number.
Step 8. Connect APsystems Microinverters to Grid
Step 9. AC Extension Cable
When AC extension cable is needed, users could connect the AC bus cable and AC extension cable in a junction box
or use a pair of male/female AC connectors that APsystems provides as optional accessory.
Step 10. Complete the APsystems installation map
a. Each APsystems Microinverter has 2 removable serial number labels.
b. Complete installation map by sticking ID label of each microinverter at the right location.
c. The second serial number label, could be stuck on the solar module frame, which could help later to confirm the
position of the microinverter without dismantling the PV module.
NOTE: ①.The layout of the microinverters’ serial numbers installation map is only suitable for
typical installation.
②.Installation Map is available in the last page appendix of this manual.
③.Use ECU_APP (available in the EMA Manager) to scan the serial numbers on the map
when setting up the ECU (see ECU instruction manual for more info).
Product information is subject to change without notice.(Please download manuals at www.APsystems.com).
NOTE: 1.Please install bi-polar circuit breakers with proper rated current or according to the local regulation,
which are mandatory to connect to grid.
2.Leakage current breakers or AFCI/GFCI breakers are not recommended to install.
Bus Cable End Cap
Male/Female AC Connectors
AC Extension Cable
NOTE: Remove the DC
connector caps before
PV modules connection.