APsystems YC1000-3-208 Instruction Manual

Installation / User Manual
Rev 3.7
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ALTENERGY POWER SYSTEM Inc.
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APsystems America
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TEL: [phone] EMAIL: [e-mail]
© All Rights Reserved (For North America)
APsystems YC1000-3 3-Phase Microinverter

YC1000-3 Installation/User Manual
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Table of Contents
Important Safety Instructions..............................................................................................................2
Radio interference statement...............................................................................................................................2
Safety Instructions................................................................................................................................................ 3
APsystems YC1000-3 System Introduction..........................................................................................4
APsystems Three-phase Microinverter YC1000-3............................................................................... 6
APsystems Microinverter System Installation.................................................................................... 7
Additional Installation components from APsystems..........................................................................................7
Required Parts and Tools from you...................................................................................................................... 7
PV Rapid Shut Down Equipment.......................................................................................................................... 8
Installation Procedures......................................................................................................................................... 9
Step 1 - Lay the AC bus according to the arrangement of APsystems Microinverter.................................. 9
Step 2 - Attaching the APsystems Microinverters to the Racking................................................................ 9
Step 3 - Connecting the APsystems Microinverter Cables to the AC bus cable.........................................10
Step 4 - Connecting APsystems Microinverters to the PV Module............................................................ 11
Step 5 - Install a Bus Cable End Cap at the end of AC bus cable................................................................ 11
Step 6 - Installing the AC Branch Circuit Junction Box............................................................................... 12
Step 7 - Completing the APsystems Installation Map................................................................................ 13
APsystems microinverter system operating instructions................................................................. 13
Troubleshooting................................................................................................................................. 15
Status Indications and Error Reporting...............................................................................................................15
Troubleshooting a non-operating APsystems Microinverter............................................................................. 16
Replace a microinverter.....................................................................................................................17
Technical Data.................................................................................................................................... 18
YC1000-3-208 3-Phase Microinverter Datasheet............................................................................................... 19
YC1000-3-480 3-Phase Microinverter Datasheet............................................................................................... 20
Wiring Diagram.................................................................................................................................. 21
Sample Wiring Diagram - 120V/ 208V Three Phase........................................................................................... 22
Sample Wiring Diagram - 277V/ 480V Three Phase........................................................................................... 23
YC1000-3 Accessory........................................................................................................................... 24
Wiring Diagram................................................................................................................................................... 24
Accessories Summary......................................................................................................................................... 25

YC1000-3 Installation/User Manual
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Important Safety Instructions
This manual contains important instructions to follow during installation
and maintenance of the APsystems Photovoltaic Grid-connected Inverter
(Microinverter). To reduce the risk of electrical shock and ensure the safe
installation and operation of the APsystems Microinverter, the following
symbols appear throughout this document to indicate dangerous conditions
and important safety instructions.
SAVE THESE INSTRUCTIONS! This manual contains important instructions
for models YC1000-3-208/YC1000-3-480 that must be followed during
Installation and maintenance of the Photovoltaic Grid-connected Inverter.
Specifications subject to change without notice - please ensure you are using
the most recent update found at www.APsystems.com
WARNING: This indicates a situation where failure to follow
instructions may cause a serious hardware failure or personnel
danger if not applied appropriately. Use extreme caution when
performing this task.
NOTE: This indicates information that is important for optimized
Microinverter operation. Follow these instructions closely.
Radio interference statement
FCC Compliance：The equipment can comply with the limits for a class B
digital device, pursuant to part 15 of the FCC Rules, which are designed to
protect against harmful interference in a residential installation. The
equipment could radiate radio frequency energy and this might cause harmful
interference to radio communications if not following the instructions when
installing and using the equipment. But there is no guarantee that interference
will not occur in a particular installation. If this equipment causes harmful
interference to radio or television reception, the following measures might
resolve the issues:
A) Relocate the receiving antenna and keep it well away from the equipment.
B) Consult the dealer or an experienced radio / TV technical for help.
Changes or modifications not expressly approved by the party responsible
for compliance may void the user’s authority to operate the equipment.
WARNING
SYMBOL
NOTE
SYMBOL

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Safety Instructions
Do NOT disconnect the PV module from the APsystems Microinverter
without first disconnecting the AC power.
Only qualified professionals should install and/or replace APsystems
Microinverters.
Perform all electrical installations in accordance with local electrical codes.
Before installing or using the APsystems Microinverter, please read all
instructions and cautionary markings in the technical documents and on
the APsystems Microinverter system and the solar-array.
Be aware that the body of the APsystems Microinverter is the heat sink
and can reach a temperature of 80°C. To reduce risk of burns, do not touch
the body of the Microinverter.
Do NOT attempt to repair the APsystems Microinverter. If it fails, contact
APsystems Customer Support (206-855-5100) to obtain an RMA number and
start the replacement process. Damaging or opening the APsystems
Microinverter will void the warranty.
Do NOT expose the connection to directed, pressurized liquid (water jets, etc.).
Do NOT expose the connection to continuous immersion.
Do NOT expose the AC connector to continuous tension (e.g., tension due
to pulling or bending the cable near the connection).
Use only the connectors and cables provided.
Do NOT allow contamination or debris in the connectors.
Use the cable and connectors only when all parts are present and intact.
Use the terminator to seal the conductor end of the Engage Cable; no other
method is allowed.
To reduce the risk of fire, connect only to a circuit provided with 25 amperes
maximum branch circuit overcurrent protection in accordance with the
National Electrical Code, ANSI/NFPA 70.
a) Both AC and DC voltagesource are terminated inside thisequipment. Each
circuit must beindividually disconnected before servicing. b) When the
photovoltaicarray is exposed to light, it supplies a DC voltage to this equipment.
Warrantyvoid if cover removed.
This Utility-InteractiveInverter contains activeanti-islanding protection
(IEEE1547) and is tested per FCC/IC.

YC1000-3 Installation/User Manual
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APsystems YC1000-3 System Introduction
The APsystems Microinverter is used in utility-interactive grid-tied
applications, comprised of three key elements:
APsystems Microinverter
APsystems Energy Communication Unit (ECU)
APsystems Energy Monitor and Analysis (EMA) web-based
monitoring and analysis system
Bra nc h J-box
Ground
Ne utra l
Me te r
AC Di s tri buti on Pane l
PV
Modul e
PV
Modul e
M ic r o in v e rt e r
EC U
Figure 1

YC1000-3 Installation/User Manual
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APsystems YC1000-3 System Introduction
This integrated system improves safety; maximizes solar energy harvest;
increases system reliability, and simplifies solar system design, installation,
maintenance, and management.
APsystems Microinverters maximize PV energy
production
The APsystems microinverter ensures top performance from the array
by maximizing the performance of the module within the array when
PV modules in the array are affected by shading.
More reliable than centralized or string inverters
The distributed microinverter system ensures that no single point of
system failure exists across the PV system. APsystems microinverters
are designed to operate at full power at ambient temperatures of up
to +65°C (+149° F). The inverter housing is designed for outdoor
installation and complies with the NEMA 4X environmental enclosure
rating.
Simple to install
You can install individual PV modules in any combination of module
quantity, orientation, different type and power rate (check on-line module
compatibility or contact APsystems).
Smart system performance monitoring and analysis.
The APsystems Energy Communication Unit (ECU) is installed
by simply plugging it into any wall outlet and providing it with an
Ethernet or Wi-Fi connection to a broadband router. After installing
and setting the ECU (see ECU manual), the full network of APsystems
Microinverters automatically reports to the APsystems Energy Monitor
and analysis (EMA) web server. The EMA software displays performance
trends, informs you of abnormal events, and controls system shutdown when it is needed.
Reference the ECU Manual for installation and operation instructions.

YC1000-3 Installation/User Manual
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APsystems Three-phase Microinverter YC1000-3
The APsystems YC1000-3 Microinverters connect with the Three-phase
grid, and operate with most 60, 72, 84 and 96 cell PV modules. For more
information, please see the Technical Data page (p.16) of this manual.
Model Number
AC grid
PV Module
Module Connector
YC1000-3-208
120V/208V
60,72,84,96
Cell
MC-4 Compatible or Customize
YC1000-3-480
277V/480V
60,72,84,96
Cell
MC-4 Compatible or Customize

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APsystems Microinverter System Installation
A PV system using APsystems Microinverters is simple to install. Each
Microinverter easily mounts on the PV racking, directly beneath the PV
module(s). Low voltage DC wires connect from the PV module directly
to the Microinverter, eliminating the risk of high DC voltage.
Installation MUST comply with local regulations and technical rules.
Special Statement! An AC GFCI device should not be used to protect the
dedicated circuit to the APsystems microinverter even though it is an outside
circuit. None of the small GFCI devices (5mA-30 mA) are designed for back
feeding and will be damaged if back feed. In a similar manner, AC AFCIs
have not been evaluated for back feeding and may be damaged if back feed
with the output of a PV inverter.
WARNING: Perform all electrical installations in accordance
with local electrical codes.
WARNING:Be aware that only qualified professionals should
install and/or replace APsystems Microinverters.
WARNING: Before installing or using an APsystems
Microinverter, please read all instructions and warnings in the
technical documents and on the APsystems Microinverter system
itself as well as on the PV array.
WARNING: Be aware that installation of this equipment
includes the risk of electric shock.
WARNING: Do not touch any live parts in the system, including
the PV array, when the system has been connected to the electrical
grid.
NOTE: Strongly recommend to install Surge protection Devices
in the dedicated meter box.
Additional Installation components from APsystems
Bus Cable End Cap (sold separately)
Bus Cable T-CONN Cap ( sold separately)
Required Parts and Tools from you
In addition to your PV array and its associated hardware, you will need
the following items:
An AC connection junction box
Mounting hardware suitable for module racking
Sockets and wrenches for mounting hardware
Continuous grounding conductor and grounding washers
A Phillips screwdriver
A torque wrench
NOTE: The AC output is bonded to ground, but the neutral is not.
Overcurrent protection for the AC output circuit shall be provided
in the end installation. A disconnect switch shall be provided by
others for the AC output circuit. (May be required by local code or
AHJ).

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APsystems Microinverter System Installation
PV Rapid Shut Down Equipment
This product is PV Rapid Shut Down Equipment and conforms with NEC-2014 and NEC-2017
section 690.12, for AC and DC conductors, when installed according to the following
requirements:
Microinverters and all DC connections must be installed inside the array boundary.
The array boundary is defined as 305 mm (1 ft.) from the array in all directions, or 1
m (3 ft.) from the point of entry inside a building.
This rapid shutdown system must be provided with an initiating device and (or with) status
indicator which must be installed in a location accessible to first responders, or be connected to
an automatic system which initiates rapid shutdown upon the activation of a system disconnect
or activation of another type of emergency system.
The initiator shall be listed and identified as a disconnecting means that plainly indicates
whether it is in the “off” or “on” position. Examples are:
Service disconnecting means
PV system disconnecting means
Readily accessible switch or circuit breaker
The handle position of a switch or circuit breaker is suitable for use as an indicator. Refer to
NEC for more information.
Additionally, in a prominent location near the initiator device, a placard or label must be
provided with a permanent marking including the following wording:
’PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN’ The term
‘PHOTOVOLTAIC’ may be replaced with ‘PV.’
The label requires reference NEC 690.65 to meet the audit requirements.

YC1000-3 Installation/User Manual
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Installation Procedures
APsystems Microinverters are designed to only operate when they can sense
power coming from the grid. Even if they are plugged into the solar array,
they will not turn themselves on until they can read power from the grid.
WARNING: Do NOT connect APsystems Microinverters to the
utility grid or energize the AC circuit until you have completed all
of the installation procedures as described in the following sections.
Step 1 - Lay the AC bus according to the arrangement of
APsystems Microinverter.
Step 2 - Attaching the APsystems Microinverters to the
Racking.
Figure 2
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.
WARNING: Prior to installing any of the microinverters, verify
that the utility voltage at the point of common connection matches
the voltage rating on microinverter label.
WARNING: Do not place the inverters (including DC and AC connectors)
Where exposed to the sun, rain or snow, even gap between modules.
Allow a minimum of 3/4’’(1.5cm.) between the roof and the bottom of the
Microinverter to allow proper air flow.

YC1000-3 Installation/User Manual
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Installation Procedures
Step 3 - Connecting the APsystems Microinverter Cables to
the AC bus cable.
Figure 3
Cover all unused T connectors with Bus Cable T-CONN Cap to protect the T connectors.
Figure 4
AC connector interface as follows, from left to right PE, N, L3, L2, L1.
Figure 5
PE N L3 L2 L1
Click

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Installation Procedures
Step 4 - Connecting APsystems Microinverters to the PV Module.
Place the PV modules into position on the racking and connect the DC input
cables to the microinverters based on optimum layout configuration (up to
four PV modules per microinverter).
CH4 CH3 CH2 CH1
Figure 6
NOTE: The status LED for on each microinverter will blink green
three (3) times to indicate normal operation once DC power is applied.
It is important to understand that this “start up” sequence occurs once
the first module is connected to the microinvert and is successfully
generating DC power. The “start up” sequence does NOT reoccur as
additional modules are connected to the same microinverter.
Step 5 - Install a Bus Cable End Cap at the end of AC bus cable.
a．Wire stripping
b．Set the parts on the cable.
c．Insert five wires into the core wires hole of the
body.
d．Insert seal and Clamp Finger into the
body ,then tighten the nut, torque 2.5±0.5NM.
Figure 7

APsystems YC1000-3 Installation/User Manual
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Installation Procedures
Step 6 - Installing the AC Branch Circuit Junction Box.
Figure 8
a. Install an appropriate junction box at a suitable location on the PV
racking system (typically at the end of a branch of modules).
b. Connect the open wire end of the AC bus cable into the junction
box using an appropriate gland or strain relief fitting.
c. Wire the conductors of the AC bus: L1- BLACK; L2 - RED; L3 - BLUE; N -
WHITE; PE – GREEN.
d. Connect the AC branch circuit junction box to the point of utility
Interconnection.
WARNING: Wiring colour code can be different according 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 an issue is not covered by the warranty.
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.

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Installation Procedures
Step 7 - Completing the APsystems Installation Map
Fill in the APsystems Warranty Cards, which provide system information
and the installation map. Feel free to provide your own layout if a larger
or more intricate installation map is required. The layout map provided
is designed to accommodate labels in vertical or horizontal orientation to
meet all the field PV connections.
a. Each APsystems microinverter has removable serial number
labels. Peel labels off, and affix one to the respective location
on the APsystems installation map, and affix another to the
PV module frame which is easy to see.The warranty cards can
be obtained from the appendix of this manual or APsystems
website: www.APsystems.com
b. Fill out the warranty cards and email to APsystems at
[e-mail].
c. Register the system using your Installer Account on the
APsystems EMA. You can then use the EMA website to view
detailed performance of the PV system.
Figure 9
NOTE: 1. Step 1～7 can change sequence for convenience of installation.
2. Warranty card is located in Appendix last page of this manual.
3. You can use Scanning Gun or mobile phone with APsystems
ArrayApp to scan the serial numbers on the map when set ECU
(see ECU manual).
4.Using apsystems' mobile app ArrayApp can make the installation
and registion muchmore simple.

YC1000-3 Installation/User Manual
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APsystems microinverter system operating instructions
To operate the APsystems microinverter PV system:
1. Turn ON the AC circuit breaker on each microinverter AC branch
circuit.
2. Turn ON the main utility-grid AC circuit breaker. Your system will
start producing power after a five-minute safety delay period.
3. The APsystems microinverters will start to send performance data
over wireless to the ECU. The time required for all the
microinverters in the system to report to the ECU will vary with the
number of microinverters in the system. You can verify proper
operation of the APsystems microinverters via the ECU. See the ECU
Installation and Operation Manual for more information.

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Troubleshooting
Qualified personnel can use the following troubleshooting steps if the
PV system does not operate correctly:
Status Indications and Error Reporting
Start up LED
Three (3) short green blinks, when DC power is first applied to the
microinverter, indicates a successful microinverter start up. It is
important to understand that this “start up” sequence occurs once
the first module is connected to the microinvert and is successfully
generating DC power. The“start up” sequence does NOT reoccur as
additional modules are connected to the same microinverter.
Operation LED
Flashing Slow Green (10 sec. gap) - Producing power and communicating
with ECU
Flashing Fast Green (2 sec. gap) - Producing power and not
communicating with ECU over 60 minutes
Flashing Red - Not producing power
Steady Red - Electrode assembly ground fault protection
Other Faults
All other faults are reported to the ECU. Refer to the ECU
Installation and Operation Manual for a list of additional faults
and troubleshooting procedures.
WARNING: Only qualified personnel should directly handle the
APsystems microinverter.
WARNING: Never disconnect the DC wire connectors under
load. Ensure that no current is flowing in the DC wires prior to
disconnecting. An opaque covering may be used to cover the module
prior to disconnecting the module.
WARNING: Always disconnect AC power before disconnecting
the PV module wires from the APsystems microinverter.
WARNING: The APsystems microinverter is powered by PV module
DC power. Make sure you disconnect and reconnect the DC connections
to watch for the three short LED flashes indicating start up.

YC1000-3 Installation/User Manual
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Troubleshooting
Troubleshooting a non-operating APsystems Microinverter
To troubleshoot a non-operating APsystems Microinverter, Follow
the steps below in order:
1. Verify the utility voltage and frequency are within ranges shown
in the Technical Data section of this manual.
2. Check the connection to the utility grid. Verify utility power is
present at the inverter in question by removing AC, then DC
power. Never disconnect the DC wires while the microinverter
is producing power. Re-connect the DC module connectors and
watch for three short LED flashes.
3. Check the AC branch circuit interconnection between all the
microinverters. Verify each inverter is energized by the utility grid
as described in the previous step.
4. Make sure that any AC breaker are functioning properly and are closed.
5. Check the DC connections between the microinverter and the PV module.
6. Verify the PV module DC voltage is within the allowable range shown
in the Technical Data of this manual.
7. If the problem persists, please call APsystems Technical Support.
WARNING: Do not attempt to repair the APsystems microinverter.
If troubleshooting methods fail, please call APsystems Customer Support.

YC1000-3 Installation/User Manual
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Replace a microinverter
Qualified personnel can use the following troubleshooting steps if the PV
system does not operate correctly:
Follow the procedure to replace a failed
APsystems Microinverter.
A. Remove the APsystems microinverter from the PV Module, in the
following order:
1. Disconnect the AC by turning off the branch circuit breaker.
2. Cover the module with an opaque cover.
3. Disconnect the first AC connector in the branch circuit.
4. Disconnect the PV module DC wire connectors from the
microinverter.
5. Remove the Microinverter from the PV array racking.
B. Remove the opaque cover, install a replacement Microinverter to
the rack. Remember to observe the flashing LED light as soon as
the new Microinverter is plugged into the DC cables.
C. Connect the AC cable of the replacement Microinverter.
D. Close the branch circuit breaker, and verify operation of the replacement
Microinverter.

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Technical Data
WARNING: Be sure to verify the voltage and current specifications
of your PV module match with those of the Microinverter. Please refer to the
datasheet or usermanual which can be download from APsystems website
www.APsystems.com.
WARNING: You must match the DC operating voltage range of
the PV module with the allowable input voltage range of the
APsystems Microinverter.
WARNING: The maximum open circuit voltage of the PV module
must not exceed the specified maximum input voltage of the APsystems
microinverter.

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YC1000-3-208 3-Phase Microinverter Datasheet
Region
North America
Model
YC1000-3-208
Input Data (DC)
MPPT Voltage Range
16V-55V
Operation Voltage Range
16V-55V
Maximum Input Voltage
60V
Startup Voltage
22V
Maximum Input Current
14.8A x 4
Output Data (AC)
3-Phase Grid Type
120V/208V
Rated Output Power
900W
Maximum Output Power
1130W
Nominal Output Current
2.5A×3
Nominal Output Voltage
120V×3
Default Output Voltage Range
105.6V-132V*
Extended Output Voltage Range
82V-152V
Nominal Output Frequency
60Hz
Default Output Frequency Range
59.3Hz-60.5Hz*
Extended Output Frequency Range
55.1Hz-64.9Hz
Maximum output fault current (ac) and duration
124.23 Apk, 12.10ms of duration,4.97 Arms, over 3 cycles
Power Factor
>0.99
Total Harmonic Distortion
<3%
Maximum Units per Branch
4 for 15A×3 Breaker**
Efficiency
Peak efficiency
95%
CEC Weighted efficiency
94.5%
Nominal MPPT efficiency
99.9%
Night Power Consumption
300mW
Utility interconnection voltage and frequency trip limits and trip times
+/- 5% but not less than 160ms
Trip limit and trip time accuracy
Voltage
+/- 2VL-N
Frequency
+/- 0.05 Hz
Alternate Trip Time
See NOTE 1 below
Mechanical Data
Operating Ambient temperature range
-40 oF to +149 oF (-40 oC to +65 oC)
Storage Temperature Range
-40 oF to +185 oF (-40 oC to +85 oC)
Dimensions (W x H x D)
259mm X 242mm X 36mm (10.2” X 9.5” X 1.4”)
AC Cable (AC Bus)
14AWG
Weight
8.4lbs/3.8kg
Enclosure rating
NEMA 6
Cooling
Natural Convection - No Fans
Features
Communication
Zigbee
Transformer Design
High Frequency Transformers, Galvanically Isolated
Integrated ground
The DC circuit meets the requirements for ungrounded PV arrays in NEC690.35.
Equipment ground is provided by the PE in the AC cable. No additional ground is
required. Ground fault protection (GFP) is integrated into the microinverter.
Emissions & Immunity (EMC) Compliance
FCC Part15; ANSI C63.4;ICES-003
Safety Class Compliance
UL1741，CSA C22.2 No.107.1-01
Grid Connection Compliance
IEEE1547
© All Rights Reserved
*Programmable through ECU in field to meet customer need.
**Depending on the local regulations.
Specifications subject to change without notice - please ensure you
are using the most recent update found at www.APsystems.com