APsystems DS3 Series Micro Inverter User Guide
- June 4, 2024
- APsystems
Table of Contents
DS3 Series Micro Inverter
User Guide
DS3 Series Micro Inverter
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DS3 Series Microinverter Quick Installation Guide
Step 1. Verify that grid voltage is matching with a 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: The wiring color code can be different according to local
regulations. 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 airflow. The racking must be properly grounded
as per local electrical code.
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. M8 (Not supplied by
a. Mark the location of the microinverter on the rack, with respect to
Apsystems) grounding washer (Warning injure hand) 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 the AC bus cable
Insert the microinverter AC connector into the trunk cable connector. Make
sure to hear the “click” as proof of a robust connection.
Best Practice: Use the Bus Cable Unlock Tool of the AC Bus to disconnect the
connectors.
NOTE: AC connector interface as follows.
NOTE: Cover any unused connectors with Bus Cable
Y-CONN to protect the unused connectors.
Step 6. Install a Bus Cable End Cap at the end of the 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: the microinverter will be damaged and the warranty will not
apply.
Step 8. Connect APsystems Microinverters to Grid
NOTE:
- Please install bi-polar circuit breakers with properly rated current or according to the local regulation, which are mandatory to connect to grid.
- Leakage current breakers or AFCI/GFCI breakers are not recommended to install.
Step 9. AC Extension Cable
When an 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 an optional accessory.
Step 10. Complete the APsystems installation map
a. Each APsystems Microinverter has 2 removable serial number labels.
b. Complete the installation map by sticking the 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:
- The layout of the microinverters’ serial numbers installation map is only suitable for typical installation.
- Installation Map is available in the last page appendix of this manual.
- 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).