APS M1P User manual

ALTENERGY POWER SYSTEM, INC.
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APS M1P
Single-phase Photovoltaic
Grid-connected Inverter
Installation and User Manual
Version: 1.0
ALTENERGY POWER SYSTEM, INC.
All rights reserved

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Contact Information
ALTENERGY POWER SYSTEM Inc.
1 Yatai Road, Jiaxing, PR China 314050
Phone: [phone]
Fax: [phone]
www.altenergy-power.com
[e-mail]

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Table of Contents
1. IMPORTANT SAFETY INFORMATION ..................................................................................................... 4
Safety Instructions .............................................................................................................................................. 4
2. APS Micro-inverter System Introduction....................................................................................................... 5
3. APS Single-phase Micro-inverter M1P series Introduction ................................................................... 7
4. APS Micro-inverter System Installation......................................................................................................... 9
Installation Kits from APS.................................................................................................................................. 9
Required Parts and Tools .................................................................................................................................... 9
Installation Procedures...................................................................................................................................... 10
Step 1 –Installing the AC Branch Circuit Junction Box................................................................................ 10
Step 2 –Attaching the APS Micro-inverters to the Racking or the PV Module Frame..................................11
Step 3 - Connecting the APS Micro-inverter AC Cables.............................................................................. 12
Step 4 - Connecting APS Micro-inverters to the PV Module ....................................................................... 12
Step 5 – Ground the System ......................................................................................................................... 12
Step 6 - Completing the APS Installation Map............................................................................................. 13
5. APS micro-inverter system operating instructions ....................................................................................... 14
6. Troubleshooting............................................................................................................................................ 14
Startup LED.................................................................................................................................................. 14
Operation LED ............................................................................................................................................. 14
Other Faults .................................................................................................................................................. 14
Troubleshooting a Non-operating APS Micro-inverter..................................................................................... 15
7. Replacing a Micro-inverter........................................................................................................................... 15
8. Technical Data.............................................................................................................................................. 17
YC250A/YC250I Technical Specifications.................................................................................................. 14
YC500A/YC250I Technical Specifications.................................................................................................. 19
9. Appendix ...................................................................................................................................................... 20
9.1 Sample Wiring Diagram – Single Phase.............................................................................................. 20
9.2 Sample Wiring Diagram – 208V Three Phase..................................................................................... 21
9.3 Sample Wiring Diagram – 480V Three Phase..................................................................................... 22
9.4Installation Map Template................................................................................................................... 23

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1. IMPORTANT SAFETY INSTRUCTIONS
This manual contains important instructions to follow during installation and maintenance of the APS
Photovoltaic Grid-connected Inverter (Micro-inverter). To reduce the risk of electrical shock and ensure the safe
installation and operation of the APS Micro-inverter, 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
YC250A/YC250I, YC500A/YC500I that shall be followed during installation and maintenance of the
Photovoltaic Grid-connected Inverter.
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
Micro-inverter operation. Follow these instructions closely.
Safety Instructions
•Only qualified professionals should install and/or replace APS Micro-inverters.
•Perform all electrical installations in accordance with local electrical codes.
•Before installing or using the APS Micro-inverter, please read all instructions and
cautionary markings in the technical documents and on the APS Micro-inverter
system and the PV-array.
•Be aware that the body of the APS Micro-inverter is the heat sink and can reach a
temperature of 80°C. To reduce risk of burns, do not touch the body of the
Micro-inverter.
•Do NOT disconnect the PV module from the APS Micro-inverter without first
disconnecting the AC power.
•Do NOT attempt to repair the APS Micro-inverter. If it fails, contact APS Customer
Support to obtain an RMA number and start the replacement process. Damaging or
opening the APS Micro-inverter will void the warranty.

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2. APS Micro-inverter System Introduction
The APS Micro-inverter is an inverter system for use in utility-interactive applications,
comprised of three key elements:
•Altenergy Power Systems Micro-inverter
•Altenergy Power Systems Energy Communication Unit (ECU)
•Altenergy Power Systems Energy Monitor and Analysis (EMA) web-based monitoring
and analysis system
•
This integrated system improves safety; maximizes solar energy harvest; increases system
reliability; simplifies photovoltaic (PV) system design, installation, maintenance, and
management.
The APS Micro-inverters maximize energy production from photovoltaic (PV)
arrays. Each PV module has individual Maximum Peak Power Tracking (MPPT) controls,
which ensures that the maximum power is exported to the utility grid regardless of the
performance of the other PV modules in the array. When PV modules in the array are
affected by shading, soiling, orientation, or mismatch, the APS Micro-inverter ensures top
performance from the array by maximizing the performance of each module within the
array.
The APS Micro-inverter system is more reliable than centralized or string
inverters. The distributed Micro-inverter system ensures that no single point of system
failure exists across the PV system. APS Micro-inverters are designed to operate at full

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power at ambient temperatures of up to 65°C. The inverter housing is designed for outdoor
installation and complies with the IP65 environmental enclosure rating.
PV systems using APS Micro-inverters are very simple to install. You can install
individual PV modules in any combination of module quantity, orientation, type, and power
rate. The Ground wire (PE) of the AC cable is connected to the chassis inside of
the Micro-inverter, eliminating the installation of grounding wire.
The APS Micro-inverter system provides smart system performance monitoring
and analysis.
The APS Energy Communication Unit (ECU) is installed by simply plugging it into any wall
outlet and providing an Ethernet or Wi-Fi connection to a broadband router or modem. After
installing the ECU, the full network of APS Micro-inverters automatically reports to the APS
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.

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3. APS Single-phase Micro-inverter M1P series Introduction
The APS M1P series Micro-inverters connect with the single-phase grid, and operate with
most 60 and 72 cell PV modules. For more information, please see the section 8 Technical
Date of this manual.
Model Number AC grid PV Module Module Connector
YC250A
60Hz/240V
60,72 Cell
MC-4 Type or Customize
YC250I
60Hz/240V
60,72 Cell
MC-4 Type or Customize
YC500A 60Hz/240V 60,72 Cell MC-4 Type or Customize
YC500I 60Hz/240V 60,72 Cell MC-4 Type or Customize
Max. units per branch of YC250A/YC250I:
Maximum parallel combination of modules 21 per branch for 25 A breaker .
Maximum parallel combination of modules 17 per branch for 20 A breaker .
Max. units per branch of YC500A/YC500I:
Maximum parallel combination of modules 10 per branch for 25 A breaker .
Maximum parallel combination of modules 8 per branch for 20 A breaker .

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The following figure shows the APS YC250A/YC250I micro-inverter schematic:
APS YC500A/YC500I has two independent DC inputs, with independent MPPT
control and date monitoring.
The following figure shows the APS YC500A/YC500I micro-inverter schematic:

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4. APS Micro-inverter System Installa tio n
A PV system using APS Micro-inverters is simple to install. Each Micro-inverter easily
mounts on the PV racking, directly beneath each PV module. Low voltage DC wires connect
from the PV module directly to the Micro-inverter, eliminating the risk of high DC voltage.
Installation shall comply with local regulations and technical rules.
WARNING: Perform all electrical installations in accordance with local
electrical codes.
WARNING: Be aware that only qualified professionals should install and/or
replace APS Micro-inverters.
WARNING: Before installing or using an APS Micro-inverter, please read all
instructions and warnings in the technical documents and on the APS
Micro-inverter 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.
Installation Kits from APS
APS micro-inverter installation kit includes following items:
•An AC interconnect cable
•Protective end caps
Required Parts and Tools from you
In addition to your PV array and its associated hardware, you need to provide the following:
•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

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Installation Procedures
Installing the APS Micro-inverter System involves 6 key steps:
1. Installing the AC branch circuit junction box.
2. Attaching the APS Micro-inverters to the racking or the PV module frame.
3. Connecting the APS Micro-inverter AC cables.
4. Connect the Micro-inverters to the PV modules.
5. Ground the System
6. Completing the APS installation map.
WARNING: Do NOT connect APS Micro-inverters to the utility grid or energize
the AC circuit until you have completed all of the installation procedures as
described in the following sections.
For bracket installation, after the completion of system installation rendering as follows:
Step 1 - Installing the AC Branch Circuit Junction Box
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 interconnect cables into the junction box using
an appropriate gland or strain relief fitting.
c. Wire the conductors: L- RED; N - BLACK; PE -WHITE.
d. Connect the AC branch circuit junction box to the point of utility interconnection.
NOTE: Be sure to size the AC wire to account for voltage drop between the
AC branch circuit junction box and the point of utility interconnection.
Joint distribution box