Alpha ESS SMILE-SP7.6-INV User manual

INSTALLATION MANUAL OF
ENERGY STORAGE SYSTEM (ESS)
SMILE-SP SYSTEM
V03

COPYRIGHT STATEMENT
1
COPYRIGHT STATEMENT
All information in this document is subject to copyright and other intellectual property
rights of Alpha ESS Co., Ltd. with all rights reserved. Please keep the manual and strictly
follow all safety and operating instructions in this manual. Please read this entire
document before installing or using SMILE-SP ESS.

CONTENT
2
CONTENT
COPYRIGHT STATEMENT .................................................................................. 1
CONTENT.............................................................................................................. 2
1. INTRODUCTION ............................................................................................... 5
1.1.Operation Modes Introduction ................................................................ 5
1.2.Application Scenarios.............................................................................. 6
1.3.Safety & Warning ...................................................................................... 7
1.3.1. Inverter Safety & Warning...................................................................................................... 7
1.3.2. Safety Warning ........................................................................................................................... 8
1.3.3. Battery Safety & Warning .....................................................................................................10
1.3.4. Inverter Interface Introduction.............................................................................................18
1.3.5. Battery Description..................................................................................................................21
1.4.Tools Required........................................................................................25
1.4.1. Installation Tools.......................................................................................................................25
1.4.2. Safety Gear for Personal Protection................................................................................25
2. STORAGE .......................................................................................................26
2.1.Inverter Storage.......................................................................................26
2.2.Battery Storage........................................................................................26
3. INSTALLATION...............................................................................................28
3.1.Unacceptable Installation ......................................................................28
3.2.Other accessories...................................................................................29
3.3.Mounting ..................................................................................................29
3.3.1. Battery Packing List................................................................................................................29
3.3.2. Batteries Installation ...............................................................................................................30
3.3.3. Mounting More Batteries.......................................................................................................32
3.3.4. Checking the Outer Packing ...............................................................................................34
3.3.5. Inverter Packing List...............................................................................................................34
3.3.6. Select Mounting Location.....................................................................................................34

CONTENT
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3.3.7. Wall Mounted Bracket and Inverter Installation .......................................................... 36
3.3.8. Transformer Packing List ..................................................................................................... 39
3.3.9. Auto-transformer Installation (Optional)......................................................................... 40
3.4.Electrical Connection .............................................................................41
3.4.1. Inverter Wiring Box Conduit Plugs................................................................................... 42
3.4.2. Removing Battery Maintenance Cover .......................................................................... 43
3.4.3. PV Wiring Connection........................................................................................................... 44
3.4.4. Power Connection between Battery and Inverter...................................................... 47
3.4.5. On-Grid Connection ............................................................................................................... 49
3.4.6. Back-up Connection............................................................................................................... 52
3.4.7. Ground Wiring........................................................................................................................... 57
3.4.8. Auto-transformer (Optional) Wiring.................................................................................. 58
3.4.9. Meter Connection.................................................................................................................... 60
3.4.10. Communication Connection between Battery (with EMS) and Inverter ........ 63
3.4.11. Wi-Fi Module Connection ................................................................................................. 65
3.4.12. LAN Connection (Optional).............................................................................................. 66
3.4.13. Battery Expansion Electrical connections.................................................................. 66
3.4.14. System Operation ................................................................................................................ 69
3.4.15. Battery Label Instruction ................................................................................................... 70
3.5.Wi-Fi Setting.............................................................................................71
3.5.1. Download and Install App .................................................................................................... 71
3.5.2. Wi-Fi Module Setting ............................................................................................................. 71
3.5.3. Overview of Functions for Installer Account................................................................. 75
3.5.4. Turn On the System before Wi-Fi Module Setting..................................................... 75
4. COMMISSIONING...........................................................................................77
4.1.Checking Before Power-On ...................................................................77
4.2.Check the Running State .......................................................................77
5. TROUBLESHOOTING....................................................................................82
5.1.Problem During Operation.....................................................................82
5.2.Question & Answers (Q&A) ...................................................................83
5.3.Protection and Error Messages.............................................................85
5.3.1. Inverter Error Troubleshooting........................................................................................... 85

CONTENT
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5.3.2. Battery Protection Description............................................................................................88
5.3.3. Battery Error Description ......................................................................................................89
6. DISCLAIMER...................................................................................................90
7. TECHNICAL PARAMETERS .........................................................................91
7.1.Inverter Specifications ...........................................................................91
7.2.Auto-transformer Specifications...........................................................93
7.3.Grid Parameter Setting...........................................................................94
7.4.Battery Specifications............................................................................ 94
8. MAINTENANCE ..............................................................................................95
8.1.Routine Maintenance.............................................................................. 95
8.2.Fans Clear and Replacement ................................................................96
8.3.Fuse Replacement ..................................................................................97
Appendix 1: Protection Category Definition ................................................100
Appendix 2: System Connection Diagram ...................................................101

INTRODUCTION
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1. INTRODUCTION
The SMILE-SP system is a fully-integrated hybrid energy storage system for residential
use. If the PV power production exceeds the load consumption, the surplus will be
stored in the battery modules. If the production is lower than consumption, the
batteries will then discharge to power the loads. If the batteries are fully charged, the
surplus will be fed back to the grid. Under normal operation, the energy storage system
will not discharge its battery to the grid.
The above-mentioned introduction describes the general operation situation of the
SMILE-SP system. The operation mode can be changed based on the system layout
with the AlphaESS App.
The applicable operations for the SMILE-SP system are illustrated below.
1.1. Operation Modes Introduction
SMILE-SP system normally has the following operation modes based on your
configuration and layout conditions.
Mode I
The energy produced by the PV strings is
primarily used to meet self-consumption
needs. The excess energy is used to
recharge the batteries. If there is still
surplus energy, it will be exported to the
grid.
Mode II
If there is no PV while the battery is
sufficient, the system can supply the
load with the grid together.

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Mode III
When the grid fails, the system will
automatically switch to back-up mode.
The back-up loads can be supplied by both
PV and battery energy.
Mode IV
The battery could be charged by the
grid, and charging time/power could be
set to various options on the AlphaESS
App.
1.2. Application Scenarios
The SMILE-SP System, including the SMILE-SP inverter and SMILE-BAT-8.2PHA (with or
without EMS), can be used with DC-coupled solar systems (mostly for new installations),
AC-coupled solar systems (mostly for retrofitting market) and Hybrid-coupled systems
(mostly for retrofitting market and PV expansion). The schemes of DC-coupled systems
which are the most common applications are shown below:
Figure 1 DC-coupled Energy Storage System –BACK-UP SELECTED CIRCUITS

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Figure 2 DC-coupled Energy Storage System –BACK-UP WHOLE HOME
1.3. Safety & Warning
1.3.1. Inverter Safety & Warning
The SMILE-SP inverter has been designed and tested in accordance with necessary
safety requirements. However, as with power electronic devices, there may still be
residual risks despite strict standards. It is strongly recommended to read the following
information carefully to prevent personal injury and property damage.
SAVE THESE INSTRUCTIONS - This manual contains important instructions for the
proper installation and maintenance of the SMILE-SP inverter.
These servicing instructions are for use by qualified personnel
only.
To reduce the risk of electric shock, do not perform any servicing
other than that specified in the operating instructions.

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Symbols Explanation
DANGER indicates a hazardous situation which, if not avoided,
will result in serious injury or even death.
WARNING indicates a hazardous situation which, if not
avoided, could result in serious injury or even death.
CAUTION indicates a hazardous situation which, if not
avoided, can result in minor or moderate injury.
Danger of high voltage and electric shock!
Hot Surface –To reduce the risk of burns. Do not touch.
Components of the product are recyclable.
This side up! Ensure that the package is always transported,
handled, and stored with the arrows pointing upwards.
Stack no more than six (6) identical packages on each other.
Do not dispose of products as household waste.
Fragile –Handle the package/product carefully and avoid
tipping or slinging it.
Refer to the operating instructions.
Keep dry! The package/product must be protected from
excessive humidity and stored under cover.
This symbol indicates that after disconnecting the inverter
from the power grid or the PV arrays, you should wait at least
5 minutes before touching the inner components.
CSA certified.
Type 1 Arc-Fault Circuit-interrupter on the PV side.
1.3.2. Safety Warning
Any installation and operation on the inverter must be performed by qualified
electricians, following the standards, wiring rules or requirements of local authorities
or the grid company.

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The input and output circuits are isolated from the enclosure. If the system grounding
is required by Sections 690.41, 690.42 and 690.43 of the National Electric Code
ANSI/NFPA 70, this is the responsibility of the installer.
Any operation on the AC or DC terminals during inverter operation is prohibited.
Before any wiring connection or electrical operation on the inverter, all DC and AC
power must be disconnected from the inverter for at least 5 minutes to make sure it
has been de-energized to avoid electric shock.
The temperature of the inverter surface might exceed 60℃during operation, so please
make sure it has cooled down before touching it, and make sure the inverter is out of
reach of children.
Do not open the inverter's cover or change any components without the
manufacturer's authorization, otherwise, the warranty commitment for the inverter will
be invalid.
The use and operation of the inverter must follow the instructions in this user manual,
otherwise, the protection design might be impacted and warranty commitment for the
inverter will be invalid.
Appropriate methods must be adopted to protect the inverter from electrostatic
damage. Any damage caused by electrostatic is not covered under the manufacturer's
warranty.
PV negative (PV-) and battery negative (BAT-) on the inverter side are not grounded.
Connecting PV- or BAT- to EARTH is strictly forbidden.
PV modules used on the inverter must have an IEC61730 class A rating, and the total
open-circuit voltage of the PV string must be lower than the maximum DC input
voltage (600V) of the inverter. Any damage caused by PV over-voltage is not covered
under warranty.
The inverter has a built-in RCMU and may produce a DC residual current of no more
than 6mA. An external Type A RCD (with operating current ≥30mA) can be used if
required.
Before connecting the SMILE-SP inverter to the AC distribution grid, approval must be
received from the appropriate local utility as required by national and state
interconnection regulations.
All electrical installations must be carried out in accordance with the local electrical
standards and the National Electrical Code ANSI/NFPA 70 or the Canadian Electrical

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Code CSA C22.1. Before connecting the inverter to the grid, contact your local grid
operator. The electrical connection of the inverter must be carried out by qualified
persons only.
•When exposed to sunlight, the PV array generates dangerous DC voltage in the
DC conductors among the live components, which can lead to significant electric
shocks. If you disconnect the terminal plate with the connected DC conductors
from the DC input slot while under load, an electric arc may occur, potentially
resulting in electric shock and burns.
•Do not touch non-insulated conductors.
•Do not touch the DC conductors.
•Do not touch any live components of the inverters.
•Any equipment damage caused by incorrect cable connections will not be
covered by the warranty.
•Operation personnel must wear proper PPE all the time when connecting cables.
•Incorrect installation of metal conductors may cause waterproof problems.
•Class 1 wiring methods are to be used for field wiring connections to terminals of
a Class 2 circuit.
•AC output (neutral) is not bonded to ground.
•To reduce the risk of fire, please add an overcurrent protection circuit breaker in
accordance with the National Electrical Code ANSI / NFPA 70.
•The inverter is not provided with an isolation transformer and is intended to be
installed per NFPA 70, 690.35 with an ungrounded PV array
•A transmitter, which meets the SUNSPEC protocol, is integrated into the SMILE-SP
inverters. It can integrate with any Rapid Shut-Down device in the market that
complies with SUNSPEC protocol to meet the requirements of NEC2017
regulation.
1.3.3. Battery Safety & Warning
1.3.3.1 General Safety Precautions
Overvoltage or wrong wiring can damage the battery pack and cause deflagration,
which can be extremely dangerous.
All types of breakdown of the battery may lead to a leakage of electrolyte or flammable
gas.
Users are not supposed to fix the battery pack by themselves. The voltage in the device
is high.
Read the label with Warning Symbols and Precautions, which is on the right side of the
battery pack.

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Do not connect any AC conductors or PV conductors, which should be only connected
to the inverter, directly to the battery pack.
Do not charge or discharge damaged batteries.
Do not damage the battery pack in such ways as dropping, deforming, impacting,
cutting or penetrating with a sharp object. It may cause a leakage of electrolyte or fire.
Do not expose the battery to naked light.
1.3.3.2 Response to Emergency Situations
The battery pack is composed of multiple batteries and is designed to prevent the
danger caused by malfunction.
If the user touches the inner material of the battery cells due to damage to the shell,
the following actions are recommended.
•Inhalation: Leave the contaminated area immediately and seek medical attention.
•Eye injuries: Rinse eyes with running water for 15 minutes and seek medical
attention.
•Skin injuries: Wash the contacted area with soap thoroughly and seek medical
attention.
•Ingestion: Induce vomiting and seek medical attention.
If a fire breaks out where the battery pack is installed, please perform the following
countermeasures:
•Fire extinguisher
A respirator is not required during normal operations.
Use FM-200 or CO2 extinguisher for battery fire.
Use an ABC fire extinguisher, if the fire is not from the battery and has not spread to it
yet.
•Firefighting instructions
If a fire occurs when charging batteries, if it is safe to do so, disconnect the battery pack
circuit breaker to shut off the battery.
If the battery pack is not on fire yet, extinguish the fire before the battery pack catches
fire.
If the battery pack is on fire, do not try to extinguish it but evacuate people immediately.

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There may be a possible explosion when batteries are heated above 150°C.
When the battery pack is burning, it leaks poisonous gases. Do not approach.
•Effective ways to deal with accidents
On land: Segregate the damaged battery and call the local fire department or service
engineer.
In water: Stay out of the water and don't touch anything if any part of the battery,
inverter, or wiring is submerged.
Do not use the submerged battery again and contact the service engineer.
1.3.3.3 Important Safety Instructions
This section contains safety precautions that must be observed at all times when
working on or with the product.
To prevent personal injury and property damage and ensure the long-term operation
of the product, please read this section carefully and follow all safety precautions at all
times.
Danger to life due to high voltages on the battery pack.
The voltage at the pin connector for the power cable can be lethal. Putting the pin
connector for the power cable can result in a lethal electric shock.
•Do not open the battery pack.
•Do not wipe over the battery pack with a damp cloth.
The protective caps cannot be removed from the pin connectors for the batteries’
power connection until the inverter cables are connected to the battery pack.
•Disconnect the product from voltage sources and make sure it cannot be
reconnected before working on the inverter or the battery pack.

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Risk of chemical burns caused by electrolyte or toxic gases
During normal operation, no electrolyte would leak from the battery pack and no
toxic gases would form. Despite the careful construction, if the battery pack is
damaged or a fault occurs, it is possible that electrolyte may be leaked or toxic gases
may form.
•Store the battery pack in a cool and dry place.
•Do not drop the battery pack or damage it with sharp objects.
•Only set the battery pack down on its back or its bottom.
•Do not open the battery pack.
•Do not install or operate the battery pack in a potentially explosive atmosphere
or areas of high humidity.
•If moisture has penetrated the battery pack (e.g. due to a damaged housing), do
not install or operate the battery pack.
•In case of contact with electrolyte, rinse the affected areas immediately with
water and consult a doctor without delay.
Damage to the inverter due to electrostatic discharge
•Touching electronic components can cause damage to or destroy the inverter
through electrostatic discharge.
•Ground yourself before touching any component.
Damage due to cleaning agents
•The use of cleaning agents may cause damage to the product and its
components.
•Clean the product and all its components only with a cloth moistened with clear
water.

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Danger to life due to electric shock when acting components or cables are
touched
There are high voltages in the conductive components or cables of the product.
Touching live parts and cables can result in significant injuries or even death due to
electric shock.
•Do not touch non-insulated parts or cables.
•Disconnect the product from voltage sources and make sure it cannot be
reconnected before working on the inverter or the battery pack.
•After disconnection, wait 5 minutes until the capacitors have discharged.
•Do not open the product.
•Wear suitable personal protective equipment for all work on the product.
Danger to life due to electric shock when acting components or DC cables are
touched
When PV panels are exposed to sunlight, the PV array generates high DC voltage
which is present in the DC conductors. Touching the live DC cables can result in
significant injuries or even death due to electric shock.
•Disconnect the inverter from voltage sources and make sure it cannot be
reconnected before working on the device.
•Do not touch non-insulated parts or cables.
•Do not disconnect the DC connectors under load.
•Wear suitable personal protective equipment for all work on the inverter.
Danger to life due to electric shock from touching an ungrounded PV module
or array frame
•Touching ungrounded PV modules or array frames can result in significant
injuries or even death due to electric shock.
•Connect and ground the frame of the PV modules, the array frame and the
electrically conductive surfaces so that there is continuous conduction.
•Observe the applicable local regulations.

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Danger to life due to electric shock when touching acting system components
in case of a ground fault
When a ground fault occurs, parts of the system may still be live. Touching live parts
and cables can result in significant injuries or even death due to electric shock.
•Disconnect the product from voltage sources and make sure it cannot be
reconnected before working on the device.
•Touch the cables of the PV array on the insulation only.
•Do not touch any parts of the substructure or frame of the PV array.
•Do not connect PV strings with ground faults to the inverter.
Risk of burns due to hot enclosure of the inverter
•The enclosure of the inverter can get hot during operation.
•During operation, do not touch any parts other than the cover of the inverter.
Damage to the inverter due to electrostatic discharge.
•Touching electronic components can cause damage to or destroy the inverter
through electrostatic discharge.
•Ground yourself before touching any component.
Damage due to cleaning agents.
•The use of cleaning agents may cause damage to the product and its
components.
•Clean the product and all its components only with a cloth moistened with clear
water.

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Symbols on the type label and warning label of the battery pack
Symbol
Explanation
Beware of a danger zone
This symbol indicates that the product must be additionally
grounded if additional grounding or equipotential bonding is
required at the installation site.
Beware of electrical voltage
The product operates at high voltages.
Risk of chemical burns
Risk of explosion
Observe the documentation
Risk of electrolyte leakage
CE marking
The product complies with the requirements of the applicable EU
directives.
Refer to the instruction for operation
Use eye protection
Fire, naked light and smoking prohibited
Keep away

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Symbol
Explanation
Do not dispose of the battery pack together with the household waste
but in accordance with the locally applicable disposal regulations for
batteries
Recycling code
Marking for transport of dangerous goods
The product passes the certifications of the UN38.3

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Product Overview
1.3.4. Inverter Interface Introduction
1.3.4.1 Inverter Product Overview

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Item
Object
Description
1
DC switch
DC switch is used to shut down the PV strings in case of
emergency and also to avoid electric shock when wiring
and maintenance. It also can be used as RSD (remote
shutdown) switch
2
AC bypass
switch
It is optional for SMILE-SP inverter. The switch may be
used to "bypass" AC mains to backup loads only when the
inverter malfunctions so that the backup load can be
connected to the grid for power supply. The switch should
be turned back to the original "Normal" position when the
inverter is in normal operation so that normal back-up
function can be enabled. The bypass switch is in "Normal"
position by default.
3
EMS
Used to communicate with the battery pack SMILE-BAT-
8.2PHA (with EMS).
1.3.4.2 User Interface Introduction
1.3.4.3 Inverter LED Signals
Eight LED indicators are provided on the display panel.
These LED indicators provide information about the operational status of the product.
LED Indicator
Status
Explanation
SYSTEM
The system works normally.
The system is not operating.
BACK-UP
Back-up is ready / power available.
Back-up is off / power unavailable.
BMS COM
The communication between EMS and
battery is normal.