APsystems DS3 Series User manual

2021/08/26 Rev1.1 Quick Installation Guide
1
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: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.
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.
Step 5. Connect the APsystems microinverter to AC bus cable
Insert the microinverter AC connector into the trunk cable connector. Make sure to hear the “click” as a
proof of robust connection.
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Best Practice: Use the Bus Cable Unlock Tool
of AC Bus to disconnect the connectors.
NOTE: It is strictly prohibited to hand
carry the microinverter by its AC cable.
Click
Grounding lug

2021/08/26 Rev1.1 Quick Installation Guide
2
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 red one time
and 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.
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.
Step 8. 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).
a
b
c
d
NOTE: AC connector interface as follows.
NOTE: Cover any unused connectors with Bus
Cable Y-CONN to protect the unused connectors.
Nut
Seal
Body
From left to right are:
L-PE-N or L1-PE-L2.