SMA SI44M-80H-13-BE Sunny Island Instruction Manual
- June 12, 2024
- SMA
Table of Contents
SMA SI44M-80H-13-BE Sunny Island
Product Information
Product Name: SUNNY ISLAND 4.4M / 6.0H / 8.0H
Manufacturer: SMA Solar Technology AG
Version: 1.5
Product Usage Instructions
Scope of Delivery
The package includes the following items:
- Sunny Island
- Mounting accessories
- Micro SD card
- Grounding conductor
- Control cables
- Measuring cables
- AC power cable
Mounting
Before mounting the Sunny Island, ensure that you meet the following requirements:
- Refer to the user manual for detailed mounting instructions.
- Ensure a stable and secure mounting surface.
- Keep a safe distance from other objects to allow for proper ventilation.
To mount the Sunny Island, follow these steps:
- Refer to the user manual for detailed step-by-step instructions.
- Ensure all necessary tools and equipment are available.
- Attach the mounting brackets to the designated locations.
- Securely mount the Sunny Island onto the brackets.
Electrical Connection
The electrical connection of the Sunny Island involves several steps. Please follow the instructions carefully:
- Refer to the user manual for detailed electrical connection instructions.
- Identify the connection area on the Sunny Island.
- Insert the provided Micro SD card into the designated slot.
- Connect the grounding conductor to a grounded battery.
- Connect the various components, including control cables and measuring cables, as specified in the user manual.
- If applicable, connect the Stand-Alone Grid or Multicluster-Box as per the provided instructions.
Note: Ensure that all connections are secure and properly insulated to prevent any electrical hazards. For more detailed instructions and information, please refer to the complete user manual provided by SMA Solar Technology AG.
Operating manual
SUNNY ISLAND 4.4M / 6.0H / 8.0H
ENGLISH
SI44M-80H-13-BE-en-15 | Version 1.5
Legal Provisions
SMA Solar Technology AG
Legal Provisions
The information contained in these documents is the property of SMA Solar
Technology AG. No part of this document may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means, be it
electronic, mechanical, photographic, magnetic or otherwise, without the prior
written permission of SMA Solar Technology AG. Internal reproduction used
solely for the purpose of product evaluation or other proper use is allowed
and does not require prior approval. SMA Solar Technology AG makes no
representations or warranties, express or implied, with respect to this
documentation or any of the equipment and/or software it may describe,
including (with no limitation) any implied warranties of utility,
merchantability, or fitness for any particular purpose. All such
representations or warranties are expressly disclaimed. Neither SMA Solar
Technology AG nor its distributors or dealers shall be liable for any
indirect, incidental, or consequential damages under any circumstances. The
exclusion of implied warranties may not apply in all cases under some
statutes, and thus the above exclusion may not apply. Specifications are
subject to change without notice. Every attempt has been made to make this
document complete, accurate and up-to-date. Readers are cautioned, however,
that product improvements and field usage experience may cause SMA Solar
Technology AG to make changes to these specifications without advance notice
or per contract provisions. SMA Solar Technology AG shall not be responsible
for any damages, including indirect, incidental or consequential damages,
caused by reliance on the material presented, including, but not limited to,
omissions, typographical errors, arithmetical errors or listing errors in the
content material.
SMA Warranty You can download the current warranty conditions from the
Internet at www.SMA-Solar.com.
Software licenses The licenses for the installed software modules (open
source) can be found in the user interface of the product.
Trademarks All trademarks are recognized, even if not explicitly identified as
such. Missing designations do not mean that a product or brand is not a
registered trademark.
SMA Solar Technology AG Sonnenallee 1 34266 Niestetal Germany Phone +49 561
9522-0 Fax +49 561 9522 100 www.SMA.de E-mail: [email protected] Status: 9/28/2022
Copyright © 2022 SMA Solar Technology AG. All rights reserved.
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1 Information on this Document
SMA Solar Technology AG
1 Information on this Document
1.1 Validity
This document is valid for: · SI4.4M-13 (Sunny Island 4.4M) from firmware
version 3.30.12.R · SI6.0H-13 (Sunny Island 6.0H) from firmware version
3.30.12.R · SI8.0H-13 (Sunny Island 8.0H) from firmware version 3.30.12.R
1.2 Target Group
This document is intended for qualified persons and operators. Only qualified
persons are allowed to perform the activities marked in this document with a
warning symbol and the caption “Qualified person”. Tasks that do not require
any particular qualification are not marked and can also be performed by
operators. Qualified persons must have the following skills:
· Knowledge of how an inverter works and is operated · Knowledge of how
batteries work and are operated · Training in how to deal with the dangers and
risks associated with installing, repairing and using electrical
devices, batteries and installations · Training in the installation and
commissioning of electrical devices and installations · Knowledge of all
applicable laws, standards and directives · Knowledge of and compliance with
this document and all safety information · Knowledge of and compliance with
the documents of the battery manufacturer with all safety information
1.3 Levels of warning messages
The following levels of warning messages may occur when handling the product.
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE
Indicates a situation which, if not avoided, can result in property damage.
1.4
Icon
Symbols in the Document
Explanation Information that is important for a specific topic or goal, but is not safety-relevant
Indicates a requirement for meeting a specific goal
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1 Information on this Document
Icon
Explanation
Desired result
Example
This information is relevant for systems which are to be operated in parallel with utility grid: · System for increased self-consumption (storage system) · Battery-backup system
Content is relevant for off-grid systems.
Sections describing activities to be performed by qualified persons only
1.5 Typographical Elements in the Document
Typographical element Use
bold
· Messages
· Terminals
· Elements on a user interface
· Elements to be selected
· Elements to be entered
· Connects several elements to be
selected
[Button] [Key]
· Button or key to be clicked on or pressed down
· Placeholder for variable components
(e.g., parameter names)
Example · Connect the insulated conductors to the terminals X703:1 to X703:6.
· Enter 10 in the field Minutes.
· Go to Settings > Date.
· Select [Enter].
· Parameter WCtlHz.Hz#
1.6 Designations in the Document
Complete designation
Designation in this document
SMA Flexible Storage System
Battery storage system
SMA Flexible Storage System with Battery-Backup Func- Battery-backup system tion
Sunny Boy, Sunny Tripower
PV inverter
Sunny Places, Sunny Portal, Sunny Home Manager, SMA Data Manager M
Communication product
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1 Information on this Document
SMA Solar Technology AG
1.7 Explanation of Used Terms
Term
Explanation
SMA Energy System Home
In the SMA Energy System Home (storage system), the Sunny Island uses the connected battery for the intermediate storage of excess PV energy for increased self-consumption.
Battery-backup system
In the event of grid failure, a battery-backup system supplies loads with energy and a PV system disconnected from the utility grid with voltage.
External energy source
Grid-forming generators such as electric generators or utility grids
Off-grid system
All components belonging to the stand-alone grid (e.g., Sunny Island)
Grid failure
Utility grid failure or deviation from the country-specific thresholds for voltage and frequency
Automatic transfer switch with battery-backup function
disconnects the battery-backup grid from the utility grid in the event of grid failure.
1.8 Additional Information
For more information, please go to www.SMA-Solar.com.
Title and information content
Type of information
“List of Approved Batteries” Overview of approved batteries
Technical Information
“Parameters and Measured Values” Overview of all inverter operating parameters and their configuration options
Technical Information
“Modbus® parameters and measured values” Device-specific list of the Modbus register
Technical Information
“Grounding in Off-Grid Systems”
Technical Information
“SMA Smart Home” The System Solution for Greater Independence
Planning Guidelines
“SMA GRID GUARD 10.0 – Grid Management Services via Inverter and System Technical Information Controller”
“Off-Grid Systems”
Detailed system information, connection overviews and information on
commissioning
System description
“SMA FLEXIBLE STORAGE SYSTEM” (Battery-storage system)
Detailed system information, connection overviews and information on
commissioning
System description
“SMA Energy System Home with Battery-Backup Function” (Battery-backup system)
Detailed system information, connection overviews and information on
commissioning
System description
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1 Information on this Document
Title and information content “Multicluster Systems with Stand-Alone Grid or
Increased Self-Consumption and Battery-Backup Function” Detailed system
information, connection overviews and information on commissioning
MULTICLUSTER-BOX 6.3-11
MULTICLUSTER-BOX 12
MULTICLUSTER-BOX 36
Type of information System description
Installation Connection overview Installation Connection overview
Installation Connection overview
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2 Safety
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Safety
Intended Use
The Sunny Island is a battery inverter that controls the electrical energy
balance in an off-grid system, in a system for increased self-consumption or
in a battery-backup system.
The product is for use in weather-protected outdoor areas and in indoor areas.
The ambient conditions prescribed for the product must be observed at all
times.
The product must only be used as stationary equipment.
The product is not suitable for supplying life-sustaining medical devices. A
power outage must not lead to personal injury.
Device type SI4.4M-13 must not be used for single-phase single-cluster systems
and not for three-phase multicluster systems (see planning guidelines “Design
of Off-Grid Systems with Sunny Island Devices”).
The entire battery voltage range must be completely within the permissible DC
input voltage range of the Sunny Island. The maximum permissible DC input
voltage of the Sunny Island must not be exceeded. The battery must be
protected against short circuits. The locally applicable standards and
directives must be complied with.
With lead-acid batteries, the battery room must be ventilated in accordance
with the requirements of the battery manufacturer and with the locally
applicable standards and directives (see documentation of the battery
manufacturer).
The following conditions must be satisfied for lithium-ion batteries:
· The lithium-ion battery must comply with the locally applicable standards
and directives and must be intrinsically safe.
· The battery management of the lithium-ion battery used must be compatible
with the Sunny Island (see the technical information at “List of Approved
Batteries”).
· Applicable for off-grid systems and battery-backup systems: the lithium-ion
battery must be able to supply sufficient current at the maximum output power
of the Sunny Island (see Section 16, page 175).
The DC terminal of the inverter is exclusively intended for the connection of
a battery with external battery fuse. Only DC loads or DC energy sources that
are immune to electromagnetic interference must be used.
The maximum output power of the AC sources must be observed in off-grid
systems and battery-backup systems (see Section 16, page 175). The powers of
the individual Sunny Island inverters are added to yield the maximum total
power.
The grid configuration of the utility grid must be a TN or TT system. Cables
with copper conductors must be used for the installation.
The multifunction relays of the inverter are not suitable for controlling
safety-relevant functions which can endanger persons in the event of a
malfunction in the multifunction relays.
Use SMA products only in accordance with the information provided in the
enclosed documentation and with the locally applicable laws, regulations,
standards and directives. Any other application may cause personal injury or
property damage.
Alterations to the SMA products, e.g., changes or modifications, are only
permitted with the express written permission of SMA Solar Technology AG.
Unauthorized alterations will void guarantee and warranty claims and in most
cases terminate the operating license. SMA Solar Technology AG shall not be
held liable for any damage caused by such changes.
Any use of the product other than that described in the Intended Use section
does not qualify as appropriate.
The enclosed documentation is an integral part of this product. Keep the
documentation in a convenient, dry place for future reference and observe all
instructions contained therein.
This document does not replace any regional, state, provincial, federal or
national laws, regulations or standards that apply to the installation,
electrical safety and use of the product. SMA Solar Technology AG assumes no
responsibility for the compliance or non-compliance with such laws or codes in
connection with the installation of the product.
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2 Safety
The type label must remain permanently attached to the product.
IMPORTANT SAFETY INSTRUCTIONS
Keep the manual for future reference. This section contains safety information
that must be observed at all times when working. The product has been designed
and tested in accordance with international safety requirements. As with all
electrical or electronical devices, there are residual risks despite careful
construction. To prevent personal injury and property damage and to ensure
long-term operation of the product, read this section carefully and observe
all safety information at all times.
DANGER
Danger to life due to electric shock when live components or cables are
touched High voltages are present in the conductive components or cables of
the product. Touching live parts and cables results in death or lethal
injuries due to electric shock.
· Do not touch non-insulated parts or cables. · Disconnect the product from
voltage sources and ensure it cannot be reconnected before working on the
device. · After disconnection, wait 15 minutes until the capacitors have
discharged. · Observe all safety information on components associated with the
product. · Wear suitable personal protective equipment for all work on the
product.
DANGER
Danger to life due to electric shock in case of overvoltages and if surge
protection is missing Overvoltages (e. g. in the event of a flash of
lightning) can be further conducted into the building and to other connected
devices in the same network via the network cables or other data cables if
there is no surge protection. Touching live parts and cables results in death
or lethal injuries due to electric shock.
· Ensure that all devices in the same network and the battery are integrated
into the existing surge protection. · When laying the network cables or other
data cables outdoors, it must be ensured that a suitable surge
protection device is provided at the transition point of the cable from the
product or the battery outdoors to the inside of a building.
DANGER
Danger to life due to electric shock when live components are touched because
the battery grounding is connected to grounding conductor terminals Due to the
connection of the battery grounding to the grounding conductor terminals, high
voltages might be present on the enclosure of the inverter. Touching live
parts and cables results in death or lethal injuries due to electric shock.
· Only the grounding conductors of the AC power cables may be connected to the
grounding conductor terminals of the inverter.
· Observe all safety information of the battery manufacturer. · Ground the
battery according to the battery manufacturer’s requirements. · If the locally
applicable standards and directives require battery grounding, connect the
battery grounding to
the grounding busbar in the distributor.
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DANGER
Danger to life due to electric shock in case of overvoltages and unsuitable
loads Overvoltages of up to 1500 V can occur in the stand-alone grid and in
the battery-backup grid. If the loads are not suitable for these overvoltages
or are not safe to operate, a voltage that poses a danger to life may be
present on accessible parts or cables. Touching live parts and cables results
in death or lethal injuries due to electric shock.
· Only connect loads that have a CE, RCM or UL designation. These loads are
suitable for overvoltages of up to 1500 V.
· Operate the loads only when they are technically faultless and in an
operationally safe state. · Check the loads regularly for visible damage.
DANGER
Danger to life due to electric shock when operating a damaged product
Operating a damaged product can lead to hazardous situations since high
voltages can be present on accessible product parts. Touching live parts and
cables results in death or lethal injuries due to electric shock.
· Only operate the product when it is in a flawless technical condition and
safe to operate. · Check the product regularly for visible damage. · Make sure
that all external safety equipment is freely accessible at all times. · Make
sure that all safety equipment is in good working order. · Wear suitable
personal protective equipment for all work on the product.
WARNING
Danger to life due to fire or explosion In rare cases, an explosive gas
mixture can be generated inside the inverter under fault conditions. In this
state, switching operations can cause a fire inside the inverter or explosion.
Death or lethal injuries due to hot or flying debris can result.
· In the event of a fault, do not perform any direct actions on the product. ·
Ensure that unauthorized persons have no access to the product. · Disconnect
the battery from the product via an external disconnection device. ·
Disconnect the AC circuit breaker, or keep it disconnected in case it has
already tripped, and secure it against
reconnection. · Only perform work on the product (e.g., troubleshooting,
repair work) when wearing personal protective
equipment for handling of hazardous substances (e.g., safety gloves, eye and
face protection, respiratory protection).
WARNING
Risk of injury due to toxic substances, gases and dusts. In rare cases,
damages to electronic components can result in the formation of toxic
substances, gases or dusts inside the inverter. Touching toxic substances and
inhaling toxic gases and dusts can cause skin irritation, burns or poisoning,
trouble breathing and nausea.
· Only perform work on the product (e.g., troubleshooting, repair work) when
wearing personal protective equipment for handling of hazardous substances
(e.g., safety gloves, eye and face protection, respiratory protection).
· Ensure that unauthorized persons have no access to the product.
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2 Safety
WARNING
Danger to life from electric shock due to circuit breakers that cannot be
tripped In off-grid systems and battery-backup systems, the Sunny Island can
only trip circuit breakers up to a certain tripping characteristic. Circuit
breakers with a higher operating current cannot be tripped. Under fault
conditions, a voltage that poses a danger to life may be present on accessible
parts for several seconds. Touching live components can result in death or
serious injury due to electric shock.
· SI4.4M-13: Check whether a circuit breaker has a higher trip characteristic
than B6 (B6A). · SI6.0H-13 and SI8.0H-13: Check whether a circuit breaker has
a higher trip characteristic than B16 (B16A) or
C6 (C6A). · If a circuit breaker has a higher trip characteristic than the
specified circuit breakers that can be tripped, you
should also install a residual-current device of type A.
WARNING
Risk of crushing injuries due to movable generator parts. A generator can be
started automatically by the Sunny Island. Moving parts in the generator can
crush or sever body parts.
· Operate the generator only with the specified safety equipment. · Carry out
all work on the generator in accordance with the manufacturer’s
specifications.
CAUTION
Risk of burns due to short-circuit currents on the disconnected inverter The
capacitors in the DC input area of the inverter store energy. After the
battery is isolated from the inverter, battery voltage is still temporarily
present at the DC terminal. A short circuit at the DC terminal of the inverter
can lead to burns and may damage the inverter.
· Wait 15 minutes before performing any work at the DC terminal or on the DC
cables. This allows the capacitors to discharge.
CAUTION
Risk of burns due to hot enclosure parts Some parts of the enclosure can get
hot during operation.
· Mount the inverter in such a way that it cannot be touched inadvertently
during operation.
NOTICE
Damage to the product due to sand, dust and moisture ingress Sand, dust and
moisture penetration can damage the product and impair its functionality.
· Only open the product if the humidity is within the thresholds and the
environment is free of sand and dust. · Do not open the product during a dust
storm or precipitation. · Close the product in case of interruption of work or
after finishing work.
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2 Safety
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NOTICE
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.
NOTICE
Damage to the enclosure seal in subfreezing conditions If you open the product
when temperatures are below freezing, the enclosure seals can be damaged.
Moisture can penetrate the product and damage it.
· Only open the product if the ambient temperature is not below -5°C. · If a
layer of ice has formed on the enclosure seal when temperatures are below
freezing, remove it prior to
opening the product (e.g. by melting the ice with warm air).
NOTICE
High costs due to inappropriate Internet tariff Depending on use, the data
volume of the product transferred via the Internet may vary in size. The data
volume depends, for example, on the number of devices in the system, the
frequency of device updates, the frequency of data transfer to Sunny Portal or
the use of FTP push. High costs for the Internet connection can be the result.
· SMA Solar Technology AG recommends using an Internet flat rate.
A country data set must be set for feed-in operation To ensure the inverter
begins feed-in operation during initial commissioning, a country data set must
be set (for instance via the installation assistant on the user interface of
the product, or via a communication product). If no country data set is set,
then feed-in operation will be stopped. This state is signaled by orange glow
of the inverter LED. The power LED and the battery LED are off. The inverter
will automatically start feed-in operation only after the inverter
configuration is completed.
2.3 Battery Safety Information
This section contains safety information that must be observed at all times
when working on or with batteries. To prevent personal injury or property
damage and to ensure long-term operation of the batteries, read this section
carefully and observe all safety information at all times.
WARNING
Danger to life due to incompatible lithium-ion battery An incompatible
lithium-ion battery can lead to a fire or an explosion. With incompatible
lithium-ion batteries, it is not ensured that battery management is
intrinsically safe and will protect the battery.
· Ensure that the lithium-ion batteries are approved for use with the Sunny
Island (see technical information “List of Approved Batteries” at www.SMA-
Solar.com).
· If no lithium-ion batteries approved for the inverter can be used, lead-acid
batteries can be used. · Verify that the battery complies with locally
applicable standards and directives and is intrinsically safe.
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2 Safety
WARNING
Danger to life due to explosive gases Explosive gases may escape from the
battery and cause an explosion.
· Protect the battery environment from open flames, embers and sparks. ·
Install, operate and maintain the battery in accordance with the
manufacturer’s specifications. · Do not burn the battery and do not heat it
beyond the permitted temperature. · Additional measures for lead-acid
batteries: Ensure that the battery room is sufficiently ventilated.
WARNING
Chemical burns due to battery electrolyte If handled inappropriately, battery
electrolyte can leak from the battery and cause irritation to the eyes,
respiratory system and skin.
· Install, operate, maintain and dispose of the battery according to the
manufacturer’s specifications. · Whenever working on the battery, wear
suitable personal protective equipment such as rubber gloves, an
apron, rubber boots and goggles. · Rinse acid splashes thoroughly for a long
time with clear water, and consult a doctor immediately. · If acid fumes have
been inhaled, consult a doctor immediately.
WARNING
Danger to life due to burns caused by electric arcs through short-circuit
currents Short-circuit currents in the battery can cause heat build-up and
electric arcs. Heat build-up and electric arcs may result in lethal injuries
due to burns.
· Remove watches, rings and other metal objects prior to carrying out any work
on the battery. · Use insulated tools for all work on the battery. · Do not
place tools or metal parts on the battery. · Observe all safety information of
the battery manufacturer.
CAUTION
Risk of burns due to hot battery components Improper battery connection may
result in excessively high transition resistances. Excessive transition
resistances give rise to localized heat build-up.
· Ensure that all pole connectors are connected with the connecting torque
specified by the battery manufacturer.
· Ensure that all DC cables are connected with the connecting torque specified
by the battery manufacturer.
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2 Safety
SMA Solar Technology AG
NOTICE
Damage to the battery due to incorrect settings The set battery parameters
influence the charging behavior of the inverter. The battery can be damaged by
incorrect settings of the battery type, nominal voltage and capacity
parameters.
· Set the correct battery type as well as the correct values for nominal
voltage and battery capacity when configuring.
· Ensure that the values recommended by the manufacturer are set for the
battery (refer to the technical data of the battery in the manufacturer
documentation).
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3 Scope of Delivery
3 Scope of Delivery
Check the scope of delivery for completeness and any externally visible
damage. Contact your distributor if the scope of delivery is incomplete or
damaged.
Sunny Island
A
B
C
D
E
F
GH I
K
L
M
N
O
P
Q
R
S
T
UV
micro SD
W
X
Y
Z
a
Figure 1: Components included in scope of delivery
Position Quan- Designation tity
A
1
Sunny Island
B
2
Ventilation grid
C
1
Wall mounting bracket
D
2
Hexagon socket screw M6x10
E
2
Hexagon socket screw M6x16
F
2
Pan head screw with hex socket
M8x20
G
2
Fender washer M8
H
2
Spring washer M8
I
2
Conical spring washer M6
K
1
Clamping bracket
L
1
2-pole terminal block
M
2
3-pole terminal block
N
2
4-pole terminal block
O
1
Cable gland M20
P
1
Counter nut for cable gland M20
ACHTUNG
b
c
d
e
f
Position Quan- Designation tity
S
2
Cable gland M32
T
2
Counter nut for cable gland
M32
U
1
Filler plug M20
V
1
Filler plug M25
W
1
Putty in a separate accessory
kit
X
1
Data cable CAT5e, 2 m
Y
2
Silicon tube 10 mm x 500 mm
Z
2
Ferrite
a
1
Cable support sleeve for 1 ca-
ble
b
2
Cable support sleeve for 2 ca-
ble
c
1
Label “VDE 0126-1-1”
d
1
Quick Reference Guide
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3 Scope of Delivery
SMA Solar Technology AG
Position Quan- Designation tity
Q
2
Cable gland M25
R
2
Counter nut for cable gland M25
Position Quan- Designation tity
e
1
Micro SD card (optional)
f
1
Battery temperature sensor
(optional)
Communication for Multicluster System Order Option
A
B
Position A
B C D E
XXXXSXIX-XXXXXXX-XXX
SOysuCt an
Sys In
Can
C
D
E
Quantity 1
1 1 1 1
Designation SI-SYSCAN.BGx (CAN communication interface) installed in the master at the factory Yellow CAT5e data cable, 5 m Screw, installed in the Sunny Island at the factory Terminator, plugged into SI-SYSCAN.BGx at the factory Cable support sleeve for 4 cables
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4 Product Overview
4 Product Overview
4.1 Product Description
The Sunny Island is a battery inverter that controls the electrical energy
balance in an off-grid system, in a system for increased self-consumption or
in a battery-backup system.
A D
B
C
E
Figure 2: Design of the Sunny Island inverter
Position A B
C D E
Designation
Enclosure lid
Label with QR Code for scanning via the SMA 360° App and easy connection to
the inverter’s user interface via WLAN
Control panel with LED signals
Ventilation grid
Type label The type label uniquely identifies the inverter. You will require
the information on the type label to use the product safely and when seeking
customer support from Service. The type label must remain permanently attached
to the product. You will find the following information on the type label:
· Address of SMA Solar Technology AG · Device type (Model) · Serial number
(Serial No.) · Device-specific characteristics · Identification key (PIC) for
registration in Sunny Portal · Registration ID (RID) for registration in Sunny
Portal · WLAN password WPA2-PSK (WiFi Protected Access 2 – Preshared Key) for
direct
connection to the inverter via WLAN
4.2
Icon
Symbols on the Product
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.
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21
4 Product Overview
SMA Solar Technology AG
Icon
15 min
RoHS
Explanation Beware of electrical voltage The product operates at high
voltages.
Beware of hot surface The product can get hot during operation.
Danger to life due to high voltages in the inverter; observe a waiting time of
15 minutes. High voltages that can cause lethal electric shocks are present in
the live components of the inverter. Prior to performing any work on the
inverter, disconnect it from all voltage sources as described in this
document.
Observe the documentations Observe all documentations supplied with the
product.
Grounding conductor This symbol indicates the position for connecting a
grounding conductor.
Alternating current
Direct current
Transformer The product has a transformer.
WEEE designation Do not dispose of the product together with the household
waste but in accordance with the disposal regulations for electronic waste
applicable at the installation site.
Degree of protection IP54 The product is protected against interior dust
deposits and against water splashing from all angles against the enclosure.
CE marking The product complies with the requirements of the applicable EU
directives.
UKCA marking The product complies with the regulations of the applicable laws
of England, Wales and Scotland.
RoHS labeling The product complies with the requirements of the applicable EU
directives.
RCM (Regulatory Compliance Mark) The product complies with the requirements of
the applicable Australian standards.
ICASA The product complies with the requirements of the South African
standards for telecommunication.
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4 Product Overview
4.3 Overview of firmware versions
Systems with parallel operation with the utility grid
The system structure and system configuration (e.g. as battery-backup system)
determine the firmware version that is required for commissioning the system.
System structure
SMA Energy System Home with increased self-consumption
SMA Energy System Home Battery-backup with increased self-con- system sumption and battery backup
Single system or single-cluster sys- from 3.20.09.R tem
from 3.20.09.R
from 3.20.09.R
Multicluster system with MCBox-12.3-20
Only with 1.04.00.R Only with 1.04.00.R
Only with 1.04.00.R
Multicluster system with MC-
Box-12.3-20 and GRIDBOX-12.3-20 1)
Only with 1.04.00.R Only with 1.04.00.R
Only with 1.04.00.R
Off-grid system
The system structure and external energy source (e.g. generator) determine the
firmware version that is required for commissioning the off-grid system.
System structure
Generator
Utility grid
Generator and utility grid
Single system or single-cluster sys- from 3.20.09.R tem
from 3.20.09.R
from 3.20.09.R2)
Multicluster system with MC-
from 3.20.09.R
from 3.20.09.R
–
Box-12.3-20
Multicluster system with MC-
–
–
Box-12.3-20 and GRID-
BOX-12.3-201)
from 3.20.09.R
Multicluster system with MC-
from 3.20.09.R
–
–
Box-6.3-11 or MC-Box-36.3-113)
4.4 Interfaces and Functions
The inverter can be equipped or retrofitted with the following interfaces and
functions:
User interface for configuration and monitoring
The product is equipped as standard with an integrated webserver, which
provides a user interface for configuring and monitoring the product.
Once the connection has been established to the smart device, use a terminal
(e.g. smartphone, tablet or laptop) to connect to the product’s user interface
using a web browser.
- GRID-BOX-12.3-20 can only be used in countries where compliance with the European requirements for grid connection as set out in Commission Regulation (EU) 2016/631 for establishing a network code (known as RfG) is not required.
- An external automatic transfer switching device is required.
- Only suitable for off-grid systems.
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Smart Inverter Screen The Smart Inverter Screen enables you to view the status
display and to display the nominal energy throughput and state of charge of
the battery on the user interface login page. You therefore have an overview
of the most important inverter and battery data without having to log into the
user interface. The Smart Inverter Screen is deactivated by default. The Smart
Inverter Screen can be activated via the user interface once the inverter has
been commissioned.
SMA Speedwire The product is equipped with SMA Speedwire as standard. SMA
Speedwire is a type of communication based on the Ethernet standard. SMA
Speedwire is designed for a data transfer rate of 100 Mbps and enables optimum
communication between Speedwire devices within systems. The products supports
the encrypted system communication with SMA Speedwire Encrypted Communication.
In order to be able to use the Speedwire encryption in the system, all
Speedwire devices, except for the SMA Energy Meter, must support the function
SMA Speedwire Encrypted Communication.
SMA Webconnect The product is equipped with a Webconnect function as standard.
The Webconnect function enables direct data transmission between the product
and Internet portals Sunny Portal and Sunny Places without any additional
communication device and for a maximum of 4 products per visualized system. In
PV systems with more than 4 products, there is the option of establishing data
transmission between the products and Sunny Portal via the data logger (e.g.,
SMA Data Manager) or distributing the inverters over several systems. If there
is an existing Wi-Fi or Ethernet connection, you can directly access your
visualized system via the web browser on your smart device (e.g. smartphone,
tablet or laptop).
WLAN connection to SMA 360° app The product has a QR code. By scanning the QR
Code attached to the product via the SMA 360° app, access to the product is
established via WLAN and the connection to the user interface is made
automatically.
Wi-Fi The product is equipped with a Wi-Fi interface as standard. The inverter
is delivered with the WLAN interface activated as standard. If you do not want
to use WLAN, you can deactivate the WLAN interface. In addition, the product
has a WPS function. The WPS function is for automatically connecting the
product to a network (e.g. via router) and establish a direct connection
between the product and a smart end device.
Limited radio range The WLAN interface integrated in the inverter has a
limited range of 5 m.
· Take this range into consideration when establishing the WLAN connection.
Limited function in the event of frost The integrated WLAN interface of the
product is only designed for temperatures down to -20°C.
· Deactivate the WLAN interface at low temperatures (see Section 8.9, page
114).
Multicluster Communication In a multicluster system, the masters of the
clusters must communicate with each other via a separate CAN bus. The
Multicluster data module SISYSCAN.BGx must be installed in each master for
this multicluster communication. The interface slot SISYSCAN is for connecting
the Multicluster data module SISYSCAN.BGx. If the Sunny Islands are ordered
with the communication interface multicluster CAN, the masters are delivered
with multicluster data modules. Multicluster communication only functions with
the device types SI6.0H-13 und SI8.0H-13.
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4 Product Overview
Data Storage
Event messages and instantaneous values are saved in the Sunny Island. This
data can be evaluated and thus the operating processes in the Sunny Island
system can be traced. From this, for example, parameter settings can be
derived that will e.g. increase the self-consumption of PV energy or the
service life of the battery. For SMA Service, this data simplifies the
analysis of any errors present and the identification of possible solutions.
The storage capacity of the inverter can be extended with the optional micro
SD card. Thus, for example, data can be recorded over longer time periods,
enabling extended diagnostics possibilities to be used (see Section 16.14,
page 182).
Grid management services
The product is equipped with service functions for grid management.
Depending on the requirements of the grid operator, you can activate and
configure the functions (e.g. active power limitation) via operating
parameters.
4.5 Control panel with LED signals
A
B
C
D
=
E
F
Figure 3: Layout of the control panel
H
G
Position Icon A B
C D
Designation Start-stop button “On” button
“Off” button Inverter LED
LED signal – –
– Not glowing Glowing green Glowing orange
Glowing red Flashing green
Explanation
By pressing the start-stop button, you can start or stop the system.
Pressing the “On” button will switch the Sunny Island on. The Sunny Island is
in standby mode after being switched on.
Pressing the “Off” button will switch off the Sunny Island.
The Sunny Island is switched off.
The Sunny Island is in operation.
If the grid LED and battery LED are off: The Sunny Island is not configured.
When the battery LED is on: The Sunny Island is in standby or energy-saving
mode.
The Sunny Island switched off due to an error.
This Sunny Island is currently being configured via the user interface. In the
three-phase system additionally: This Sunny Island is the master.
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4 Product Overview
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Position Icon E
Designation Grid LED
F
Battery LED
G
Standby
H
AC operation
LED signal
Explanation
Not glowing
There is no voltage present from the generator or the utility grid.
Glowing green Generator or utility grid is connected.
Glowing orange The Sunny Island is synchronizing the standalone grid with the generator or the utility grid.
Glowing red
Error at the connection of the generator or the utility grid.
Glowing green The state of charge is more than 50%.
Glowing orange The state of charge is between 50% and 20%.
Glowing red
The state of charge is less than 20%.
–
Position of the buttons for switching on and off
–
Position of the button for starting and stopping
operation
4.6 Multifunction Relay
Using 2 multifunction relays, each Sunny Island can control various functions
and can display operating states and warning messages. Within a cluster, the
master can also access the multifunction relays of the slaves.
In a single-cluster system with battery-backup function, the multifunction
relays of the master are set permanently. In multicluster systems with
Multicluster-Box 12 (MC-BOX-12.3-20), multifunction relays 1 and 2 in the
master of the main cluster and multifunction relay 2 in slave 1 of the main
cluster are set permanently. Furthermore, free multifunctional relays can be
used for additional functions.
Possible function or Explanation output
Control of the tie
In the battery-backup system, the multifunction relays control the contactors for grid coupling
switch and of the con- and grounding.
tactors for grounding
Switch cycles in the In multicluster systems with Multicluster-Box 12, multifunction relays control different switch multicluster system cycles in the multicluster system.
Controlling generators
The multifunction relay activates if a generator request is received from the Sunny Island inverter’s generator management system. With the multifunction relay, you can control generators with an electrical remote-start function or connect a signal generator for generators with no autostart function (see Section 6.5.10, page 46).
Controlling loadshedding contactors
Depending on the state of charge of the battery, the multifunction relay picks
up and thus controls up to 2 load-shedding contactors. Basically, you can
install a one-stage or a twostage load-shedding scheme. Note the restrictions
that depend on the selected system (see Section 6.5.12, page 48).
You can adjust the thresholds for the state of charge of the battery depending
on the time of day.
Time control for exter- The multifunction relays can be time-controlled (see Section 6.5.13, page 50). nal processes
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Possible function or Explanation output
Display of operating Each multifunction relay can display either one event or one warning message (see Secstates and warning tion 6.5.14, page 51). messages
Control of a batteryroom fan
The multifunction relay is activated when the charging current causes the battery to emit gasses. A connected battery room fan is switched on for at least one hour (see Section 6.5.15, page 52).
Control of an electrolyte pump
Depending on the nominal energy throughput, the multifunction relay is activated at least once a day (see Section 6.5.16, page 53).
Use of excess energy In off-grid systems with lead-acid batteries, a multifunction relay is activated during the constant voltage phase. It thus controls additional loads that can put any excess energy to good use (see Section 6.5.17, page 53).
4.7 Information on Battery-Backup Systems
Wiring and connection of automatic transfer switches for single-phase or
three-phase batterybackup systems
· Do not bridge the neutral conductors of connections X1 to X5 in the
automatic transfer switch. If the neutral conductor connections are bridged,
residual-current devices could trip accidentally.
· Label the equipment and devices of the automatic transfer switch in
accordance with the schematic diagrams. This will facilitate installation,
commissioning and assistance in case servicing is required.
Connection of automatic transfer switches for single-phase battery-backup
systems In single-phase battery-backup systems, only the line conductor of the
Sunny Island that is connected to the circuit breaker F1 of the automatic
transfer switch is monitored for grid failure. If terminal AC2 Gen/Grid L is
connected to another line conductor, the battery-backup system is not able to
synchronize with the utility grid following a grid failure.
· With single-phase battery-backup systems, connect circuit breaker F1 and
terminal AC2 Gen/Grid L of the Sunny Island to the same line conductor, e.g.
to L1 (for a single-phase battery-backup system with an all-pole disconnection
function).
· Connect the PV inverter and the Sunny Island to the same line conductor if
possible. This way, in the event of grid failure, the PV inverters are
supplied with voltage directly and then can feed in even if phase coupling is
deactivated.
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5 Mounting
SMA Solar Technology AG
5 Mounting
5.1 Requirements for Mounting
Requirements for the mounting location:
WARNING
Danger to life due to fire or explosion Despite careful construction,
electrical devices can cause fires. This can result in death or serious
injury.
· Do not mount the product in areas containing highly flammable materials or
gases. · Do not mount the product in potentially explosive atmospheres.
WARNING
Danger to life due to explosive gases Explosive gases may escape from the
battery and cause an explosion.
· Protect the battery environment from open flames, embers and sparks. ·
Install, operate and maintain the battery in accordance with the
manufacturer’s specifications. · Do not burn the battery and do not heat it
beyond the permitted temperature. · Additional measures for lead-acid
batteries: Ensure that the battery room is sufficiently ventilated.
A solid support surface must be available (e.g., concrete or masonry). When
mounted on drywall or similar materials, the product emits audible vibrations
during operation which could be perceived as annoying.
The mounting location must be inaccessible to children. The mounting location
must be suitable for the weight and dimensions of the product (see Section 16,
page 175). The mounting location must not be exposed to direct solar
irradiation. If the product is exposed to direct solar
irradiation, the exterior plastic parts might age prematurely and overheating
might occur. When becoming too hot, the product reduces its power output to
avoid overheating. The mounting location must be less than 3000 m m above Mean
Sea Level (MSL). From altitudes of 2000 m m above MSL, the power decreases by
0.5% per 100 m. The mounting location must not hinder access to disconnection
devices. The mounting location should be freely and safely accessible at all
times without the need for any auxiliary equipment (such as scaffolding or
lifting platforms). Non-fulfillment of these criteria may restrict servicing.
All ambient conditions must be met (see Section 16, page 175). The ambient
temperature should be below 40°C to ensure optimum operation. The mounting
location of the battery must meet all requirements of the battery
manufacturer.
Permitted and prohibited mounting positions: The product may only be mounted
in a permitted position. This will ensure that no moisture can penetrate the
product. The product should be mounted in such way that display messages or
LED signals can be read without difficulty
and buttons operated.
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90° … 75°
0°
Figure 4: Permitted and prohibited mounting positions
Dimensions for mounting:
217.3
20
217.3 11
86.8
Ø 11
79.2
104.6
110
87.3
130
130
87.3
5 Mounting
593.8
507
12
Ø9
58.3 25
134
134
25 58.3
Figure 5: Position of the anchoring points(Dimensions in mm)
Recommended clearances:
If you maintain the recommended clearances, adequate heat dissipation will be
ensured. Thus, you will prevent power reduction due to excessive temperature.
Maintain the recommended clearances to walls as well as to other inverters or
objects.
If multiple products are mounted in areas with high ambient temperatures,
increase the clearances between the products and ensure sufficient fresh-air
supply.
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5 Mounting
1035
300
300
300
SMA Solar Technology AG
742
500
1400
500
Figure 6: Recommended clearances(Dimensions in mm)
5.2 Mounting the Sunny Island
CAUTION
Risk of injury due to weight of product Injuries may result if the product is
lifted incorrectly or dropped while being transported or mounted.
· Transport and lift the product carefully. Take the weight of the product
into account. · Wear suitable personal protective equipment for all work on
the product.
Mounting Sunny Island devices with multicluster communication The multicluster
data modules are installed in the master at the factory if multicluster
communication has been ordered. The master can be identified by the labeling
on the packaging.
· With multicluster systems, mount the Sunny Island devices with installed
multicluster data modules at the mounting location planned for master devices.
Additionally required mounting material (not included in the scope of delivery): At least two screws that are suitable for the foundation At least two washers that are suitable for the screws At least two screw anchors that are suitable for the support surface and the screws If the inverter is to be secured against theft, two security screws that can only be unscrewed with a special tool.
Procedure:
CAUTION
Risk of injury due to damaged cables There may be power cables or other supply
lines (e.g., gas or water) routed in the wall.
· Ensure that no lines are laid in the wall which could be damaged when
drilling holes.
2. Mark the position of the drill holes using the wall mounting bracket. Use
at least one hole on the right-hand and left-hand side in the wall mounting
bracket.
3. Drill the holes and insert the screw anchors.
4. Secure the wall mounting bracket horizontally on the wall using screws and
washers.
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5 Mounting
5. If the Sunny Island is to be secured against theft, mark the drill holes
for the anti-theft device. Use at least one hole on the right and one on the
left.
6. Mount the SI4.4M-13 to the wall mounting bracket. For this, use the side
recess grips. Keep the Sunny Island in a horizontal position when moving it.
7. Mount the SI6.0H-13 and SI8.0H-13 to the wall mounting bracket. For this,
use the side recess grips or a steel rod (diameter: maximum 30 mm). Keep the
Sunny Island in a horizontal position when moving it.
8. Use an Allen key (AF 5) to attach the Sunny Island to the wall mounting
bracket on both sides with the M6x10 screws provided (torque: 4 Nm to 5.7 Nm).
This will prevent the Sunny Island from being lifted off the bracket.
9. Close the recessed grips with the ventilation grids. Place the ventilation
grid marked links/left on the left recessed grip and the ventilation grid
marked rechts/right on the right recessed grip.
10. In order to protect the Sunny Island against theft, attach the bottom side to the wall with two security screws.
11. Ensure that the Sunny Island is firmly attached. Operating manual
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6 Electrical Connection
SMA Solar Technology AG
6 Electrical Connection
6.1 Content and Structure of the Section
Some of the following sub-sections relate to the physical connection of
components or the use of physical connections on the Sunny Island. Other sub-
sections describe actions that must always be performed.
An overview detailing which contents the sub-sections describe can be found in
the following table.
Section
Explanation
Section 6.2, page 33
Graphic overview of the connection area
Section 6.3, page 34
The section must be read and observed if the optional micro SD card is to be inserted.
Section 6.4, page 34
For systems with a grounded battery, this section must be read and observed.
Section 6.5, page 35
Information on the connection and circuitry of individual devices with
specification of connections on the Sunny Island
You must read and observe the sub-sections for the components connected to the
Sunny Island.
Section 6.6, page 55
Correct connection of the cables to the respective connections on the Sunny
Island
You must read and observe the sub-sections for the connections on the Sunny
Island used.
Section 6.7, page 63
You must read and observe the section for the connections used.
Section 6.8, page 66
You must always read and observe this section.
Section 6.9, page 67
You must always read and observe this section.
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6.2 Overview of the Connection Area
R Q
NO C NC Relay 1
NO C NC Relay 2
6 Electrical Connection
A B C D E F G H
P
O
N
M
L
K
I
Figure 7: Connection area of the Sunny Island inverter
Position Designation
A
DC+ connection
B
DC- connection
C
Slot for optional micro SD card
D
BatTmp and BatCur connections
E
BatVtgOut and DigIn connections
F
Slot for optional communication interface SI-
SYSCAN.BGx4)
G
Connecting the communication unit
H
Relay1 and Relay2 connections
I
Cable feed-through plate
Position Designation
K
Enclosure opening for DC-
L
Enclosure opening for DC+
M
Enclosure opening ExtVtg
N
Enclosure opening AC2
O
Enclosure opening AC1
P
ExtVtg connection
Q
AC1 connection
R
AC2 connection
- If the inverter was ordered with the Communication for multicluster system order option, SISYSCAN.BGx is installed in each master.
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6.3 Inserting the Micro SD Card
The optional micro SD card extends the data storage capacity of the inverter
(see Section 16.14, page 182). The micro SD card can be ordered as an optional
accessory from SMA Solar Technology AG or purchased via specialist retailers.
Perform the following steps to insert the micro SD card.
NOTICE
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.
Requirements on the micro SD card: A micro SD card must be used. Other memory
cards (e.g. MMC cards) may not be used. Data storage in the FAT16/32 file
format must be possible. Minimum storage capacity: 1 GB Maximum storage
capacity: 64 GB Quality: industry standard
Requirements: The microSD card must be available. The inverter must be
disconnected from all voltage sources (see Section 12, page 126).
Procedure: 1. On the Sunny Island, remove all screws of the lower enclosure
lid using an Allen key (AF 5) and remove the enclosure lid. Retain the screws
and conical spring washers for later use. 2. Insert the micro SD card into the
slot up to the stop. Do not jam the micro SD card when doing so. 3. Ensure
that the micro SD card is correctly plugged in.
6.4 Connecting the Grounding Conductor with a Grounded Battery
If you ground the battery, you can ground it at the positive terminal or at
the negative terminal with a grounding conductor. SMA Solar Technology AG does
not recommend grounding the battery. If the battery is grounded, the enclosure
of the Sunny Island must also be grounded. This additional grounding is no
substitute for the grounding at connections AC1 und AC2.
Cable requirements: Material: Copper wire Minimum conductor cross-section: 10
mm² (or 2x 4 mm²) Maximum conductor cross-section: 16 mm² The cross-section of
the grounding conductor must comply with the locally applicable standards and
directives. The cross-section of the grounding conductor must be sized in
accordance with the requirements of the external
battery fuse. The cross-sections of the battery grounding conductor and Sunny
Island inverter grounding conductor must be the
same.
Procedure: 1. Calculate the cross-section of the grounding conductor. Observe
all locally applicable standards and directives when doing so.
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Electrical Connection
2. Ground the battery at the positive terminal or negative terminal using a
conductor with the calculated crosssection.
3. Also ground the Sunny Island enclosure using a conductor with the
calculated cross-section, as follows. To do this, first strip the insulation
from the grounding conductor.
4. Place the clamping bracket over the conductor. Position the conductor on
the left.
5. Fasten the clamping bracket with the M6x16 hexagon socket screw and a serrated conical spring washer (AF 5, torque: 4 Nm to 5.7 Nm). The teeth of the conical spring washer must face the clamping bracket.
6.5 Connecting the Components
6.5.1 Connecting the Battery Fuse to the Sunny Island
Selecting the battery fuse The battery fuse protects the DC cables and the
battery against a short circuit. The battery fuse must be designed according
to the maximum short-circuit current of the battery, the conductor cross
section of the DC cables and the technical data of the Sunny Island (see
Section 16.3, page 176). The locally applicable standards and directives must
be complied with. If a battery fuse is already available, no further fuse is
necessary. Tip: Install a battery fuse of the type enwitec BAT FUSE HERITAGE
01 or enwitec BAT FUSE HERITAGE 03.
Maximum cable length for the DC connection Long cables and insufficient
conductor cross-sections reduce the efficiency of the system and the overload
capacity of the inverter.
· The length of all DC cables from the battery via the battery fuse to the
Sunny Island must be smaller than 10 m.
Connection of DC loads or DC energy sources The DC connection of the inverter
is primarily intended for connecting a battery. When DC loads or DC energy
sources are connected, electromagnetic interference may temporarily interfere
with operation. Therefore, DC loads or DC energy sources that are immune to
electromagnetic interference should be used. This is the case if DC loads and
DC energy sources have interference immunity for industrial environments (e.g.
according to EN 61000-6-2). SMA recommends the Sunny Island Charger of MSTE
SOLAR GmbH as DC charge controller.
The recommended minimum conductor cross-section depends on the battery
voltage, the power and the length of the cable:
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Cable requirements when using the inverter with an enwitec BAT FUSE HERITAGE 01 or enwitec BAT FUSE HERITAGE 03 battery fuse:
Sunny Island Cable length5)
Conductor cross- Cable diameter section
Terminal lug
SI8.0H
5 m
70 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
5 m
95 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
SI6.0H
5 m
50 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
5 m
70 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
SI4.4M
5 m
50 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
5 m
70 mm²
14 mm to 25 mm
M8, 20 mm to 25 mm wide
WARNING
Danger to life due to incompatible lithium-ion battery An incompatible
lithium-ion battery can lead to a fire or an explosion. With incompatible
lithium-ion batteries, it is not ensured that battery management is
intrinsically safe and will protect the battery.
· Ensure that the lithium-ion batteries are approved for use with the Sunny
Island (see technical information “List of Approved Batteries” at www.SMA-
Solar.com).
· If no lithium-ion batteries approved for the inverter can be used, lead-acid
batteries can be used. · Verify that the battery complies with locally
applicable standards and directives and is intrinsically safe.
Procedure: 1. Ensure that the load-break switch of the battery fuse is open
and secured against reconnection. 2. On the Sunny Island, remove all screws of
the lower enclosure lid using an Allen key (AF 5) and remove the enclosure
lid. Retain the screws and conical spring washers for later use. 3. Connect
the DC power cable of the battery fuse with the correct polarity (see Section
6.6.1, page 55).
6.5.2 Connecting the Utility Grid in the System for Increased Self-Consumption
Relevant for systems connected to the utility grid
Requirements:
The system may not be a battery-backup system or an off-grid system.
For connection of the Sunny Island inverter to the utility grid, there must be
a circuit breaker and a type A residualcurrent device on the distribution
board (see circuitry overview in the quick reference guide “SMA Energy System
Home”)
Procedure:
1. On the Sunny Island, connect the power cable to the AC2 Gen/Grid. When
doing so, connect the line conductor to AC2 Gen/Grid L and the neutral
conductor to AC2 Gen/Grid NTT(see Section 6.6.2, page 57).
- Cable length from the battery to the Sunny Island via the fuse switch- disconnector
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6 Electrical Connection
2. Thread the grounding conductor through a ferrite included in the scope of
delivery and connect to AC2 Gen/ Grid PE (see Section 6.6.3, page 59).
3. If the power cable conductor cross-section is less than 10 mm², thread an
additional grounding conductor through the provided ferrite and connect it to
the AC1 Loads/SunnyBoys PE terminal (see Section 6.6.3, page 59).
6.5.3 Connecting an Automatic Transfer Switch in the Battery Backup System
6.5.3.1 Connecting the AC Power Cables of the Automatic Transfer Switch
Relevant for systems connected to the utility grid
The AC power cables conduct the energy between the battery-backup grid and the
Sunny Island (see circuitry overview in the quick reference guide “SMA Energy
System Home with Battery-Backup Function”).
Requirements:
With each three-phase cluster, the connection of the line conductor must be
prepared as follows: L1 to the master, L2 to slave 1 and L3 to slave 2. This
results in a right-hand rotating magnetic field.
The power of the AC sources in the battery backup grid must not exceed the
maximum connected power of the PV inverters in the battery backup systems (see
Section 16.2, page 176). The powers of the individual Sunny Island inverters
are added to yield the total maximum power.
Procedure:
· Connect the power cable from X3 on the automatic transfer switch to the
terminals AC2 Gen/Grid on the Sunny Island. When doing so, connect the line
conductor to AC2 Gen/Grid L and the neutral conductor to AC2 Gen/ Grid NTT
(see Section 6.6.2, page 57). Thread the grounding conductor through a ferrite
included in the scope of delivery and connect to AC2 Gen/Grid PE (see Section
6.6.3, page 59).
6.5.3.2 Connecting the Control Cables of the Automatic Transfer Switch
Relevant for systems connected to the utility grid
Control cables conduct the control signals of the multifunction relays to the
contactors (see circuitry overview in the quick reference guide “SMA Energy
System Home with Battery-Backup Function”).
Cable route for control cables and measuring cables in the automatic transfer
switch An unfavorable cable route can lead to quality losses during the
transmission of control signals and measured values Observe the following
rules for cable routes:
· Lay the control and measuring cables at the greatest possible distance from
the power cables. · Use shielded cables for the control and measuring cables.
· Always connect the digital input DigIn of the Sunny Island separately via a
shielded cable.
Procedure: 1. On the master, connect the cable from X5 L and X5 N (for the
control voltage) to terminal AC1 Loads/ SunnyBoys (see Section 6.6.2, page
57).
WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
3. Connect the control cable from X4 1 and X4 2 to the connections Relay1 C
and Relay1 NC. 4. Connect the control cable from X5 1 and X5 2 to the
connections Relay2 C and Relay1 NO.
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6.5.3.3 Connecting the Measuring Cables of the Automatic Transfer Switch Relevant for systems connected to the utility grid
The Sunny Island measures the voltages of the respective line conductors via 1
measuring cable. In addition, the master measures whether the tie switch has
activated or deactivated (see circuitry overview in the quick reference guide
“SMA Energy System Home with Battery-Backup Function”).
Cable route for control cables and measuring cables in the automatic transfer
switch An unfavorable cable route can lead to quality losses during the
transmission of control signals and measured values Observe the following
rules for cable routes:
· Lay the control and measuring cables at the greatest possible distance from
the power cables. · Use shielded cables for the control and measuring cables.
· Always connect the digital input DigIn of the Sunny Island separately via a
shielded cable.
Procedure: 1. On the Sunny Island, connect the measuring cable X4 Ln (Ln = L1
to L3) and X4 N for voltage monitoring to the ExtVtg terminal (see Section
6.6.7, page 62). 2. At the master, connect the tie switch monitoring. To do
this, first connect BatVtgOut- with DigIn- within the master(see Section
6.6.6, page 61). 3. Thread both insulated conductors through a ferrite
included in the scope of delivery. 4. Connect the insulated conductor from X5
3 to DigIn+. 5. Connect the insulated conductor from X5 4 to BatVtgOut+.
6.5.4 Connecting the Stand-Alone Grid or Multicluster-Box 6 / 36
Relevant for off-grid systems
In off-grid systems you connect AC loads and the grid-parallel AC sources
(e.g. PV inverters) using an AC subdistribution board to the AC1 terminal of
the Sunny Island. In the case of a multicluster system, the Multicluster-Box 6
or Multicluster-Box 36 is the AC distribution board that is connected to
connection AC1 (for the connection of device type MC-BOX-12.3-20 Multicluster-
Box 12 (see Section 6.5.5, page 39).
Requirements for connecting Sunny Island inverters in single-phase parallel
single-cluster systems:
AC
AC
AC
AC
AC
AC
AC
AC
For a single-phase parallel single-cluster system, the cable length and conductor cross-section from each Sunny Island to the AC distribution board must be identical. This will allow for stable and symmetric operation.
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WARNING
Danger to life due to fire In case of a short circuit, the short-circuit
current driven by the generator flows over the unprotected cable between the
Sunny Island and the AC distribution board. Short-circuit currents can cause
fires.
· If the fuse on the generator has a higher operating current than the fuse in
the AC distribution board, size the cable between the generator and AC
distribution board in accordance with the operating current of the fuse on the
generator.
1. On the Sunny Island, connect the cable to the AC1 Loads/SunnyBoys. To do
this, connect the line conductor to AC1 Loads/SunnyBoys L and the neutral
conductor to AC1 Loads/SunnyBoys N(see Section 6.6.2, page 57).
2. Thread the grounding conductor through a ferrite included in the scope of
delivery and connect to AC1 Loads/ SunnyBoys PE (see Section 6.6.3, page 59).
3. If the power cable conductor cross-section is less than 10 mm², thread an
additional grounding conductor through the provided ferrite and connect it to
the AC1 Loads/SunnyBoys PE terminal (see Section 6.6.3, page 59).
6.5.5 Connection of Multicluster-Box 12 (MC-Box-12.3-20)
6.5.5.1 Connecting the AC Power Cable of the Multicluster-Box 12
WARNING
Danger to life due to fire In case of a short circuit, the short-circuit
current driven by the generator flows over the unprotected cable between the
Sunny Island and the AC distribution board. Short-circuit currents can cause
fires.
· If the fuse on the generator has a higher operating current than the fuse in
the AC distribution board, size the cable between the generator and AC
distribution board in accordance with the operating current of the fuse on the
generator.
Requirement: The inverters to be connected must be Sunny Island 6.0H / 8.0H
inverters.
Procedure: 1. Connect the AC power cable to the AC2 Gen/Grid on all Sunny
Island. When doing so, connect the line conductor to AC2 Gen/Grid L and the
neutral conductor to AC2 Gen/Grid N(see Section 6.6.2, page 57). 2. Thread the
grounding conductor through a ferrite included in the scope of delivery and
connect to AC2 Gen/ Grid PE (see Section 6.6.3, page 59).
6.5.5.2 Connecting the Control Cable of the Multicluster-Box 12
Requirement: The inverters to be connected must be Sunny Island 6.0H / 8.0H
inverters.
Procedure: 1. On the master of the main cluster, connect the X106 1 line
conductor and X106 2 neutral conductor (for the control voltage) to terminal
AC1 Loads/SunnyBoys (see Section 6.6.2, page 57).
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WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
3. On the master of the main cluster, connect the control cable of X113 1 and
X113 2 to the Relay2 C and Relay2 NO (see Section 6.6.5, page 60).
4. On the main cluster’s master, connect the control cable of X112 1 and X112
2 to the Relay1 C and Relay1 NC terminals when a Grid-Connect-Box is installed
in addition to the Multicluster-Box 12.
6.5.5.3 Connecting the Measuring Cable of the Multicluster-Box 12
Requirements: The inverters to be connected must be Sunny Island 6.0H / 8.0H
inverters. The utility grid must be connected to the multicluster system (see
Multicluster-Box 12 operating manual).
Procedure: 1. On every Sunny Island of the main cluster, connect the measuring
cable for voltage monitoring of the MulticlusterBox 12 to ExtVtg. First
connect the wires of X112 3 and X112 4 at the master to ExtVtg (see Section
6.6.7, page 62). 2. Connect the conductors of X112 3 and X112 4 on the master
to ExtVtg on each Sunny Island of the main cluster. 3. Connect the conductors
of X112 7 and X112 8 on Slave 1 to ExtVtg on each Sunny Island of the main
cluster. 4. Connect the conductors of X112 9 and X112 10 on Slave 2 to ExtVtg
on each Sunny Island of the main cluster. The measuring cable for voltage
monitoring from the Multicluster Box 12 is connected. 5. At the master of the
Main Cluster, connect the AC contactor monitoring. To do this, first connect
BatVtgOut- with DigIn- within the master(see Section 6.6.6, page 61). 6.
Thread both insulated conductors through a ferrite included in the scope of
delivery. 7. Connect the insulated conductor from X113 3 to BatVtgOut+. 8.
Connect the insulated conductor from X113 4 to DigIn+. The monitoring of the
grid contactor is connected.
6.5.6 Connecting the Generator in an Off-Grid System
Relevant for off-grid systems
For a single system and single-cluster system, connect the generator to the AC2 terminal of the Sunny Island. For a multicluster system, connect the generator directly to the Multicluster-Box (see the Multicluster-Box documentation).
WARNING
Danger to life from electric shock due to incorrect connection of the neutral
conductor Connecting the neutral conductor incorrectly can cause failure of
the protective functions in the system. This can result in death or serious
injury.
· Connect the neutral conductor to the AC2 or AC1 terminal.
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Requirements: A separate cable must be laid for each Sunny Island from the AC
distribution board or directly from the
generator. For a single-phase parallel cluster, the cable length and the
conductor cross-section must be identical from each
Sunny Island to the AC distribution board or directly to the generator. With
each three-phase cluster, the connection of the line conductor must be
prepared as follows: L1 to the master,
L2 to slave 1 and L3 to slave 2. This results in a right-hand rotating
magnetic field.
Procedure: 1. On the Sunny Island, connect the power cable to the AC2
Gen/Grid. To do this, connect the line conductor to AC2 Gen/Grid L and the
neutral conductor to terminal N(see Section 6.6.2, page 57). 2. Thread the
grounding conductor through a ferrite included in the scope of delivery and
connect to AC2 Gen/ Grid PE (see Section 6.6.3, page 59).
6.5.7 Communication Connection
6.5.7.1 Connecting the Data Cable for Speedwire Network
The Sunny Island and 1 communication product (e.g. Sunny Home Manager 2.0) can
be directly interconnected via Speedwire. If more than 2 devices are to
communicate via Speedwire or the Sunny Home Manager 2.0 is to establish an
internet connection to the Sunny Portal, a Speedwire network is required.
Requirements: All Speedwire devices must be connected to the same router. The
router and the optional network switch must fully support Multicast. The
router must support “Internet Enabled Devices” with the SIP and STUN
interfaces. Most common routers and network switches support Multicast and
“Internet Enabled Devices”.
Cable requirements: Cable length between 2 nodes:
Maximum 50 m with patch cable Maximum 100 m with installation cable Cross-
section: at least 2 x 2 x 0.22 mm² or at least 2 x 2 x 24 AWG Cable type:
100BaseTx, CAT5 with S-UTP, F-UTP shielding or higher Type of plug: RJ45
Procedure: 1. Insert the data cable in the pin connector ComETH on the Sunny
Island (see Section 6.6.4, page 59). 2. Connect the other end of the data
cable to the router or network switch.
6.5.7.2 Connecting the Data Cable of the Lithium-Ion Batteries
Requirements: The total length of the communication bus must not exceed 30 m.
Keep in mind that the communication bus
possibly connects several nodes.
Cable requirements: Classification: CAT5e Type of plug: RJ45
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PIN assignment for CAN battery communication: Pin 2 4 5
Assignment CAN Ground CAN High CAN Low
Procedure: 1. Plug the data cable into a free pin connector ComSync on the
Sunny Island (see Section 6.6.4, page 59). 2. Connect the other end of the
data cable to the battery management of the lithium-ion battery (see battery
manufacturer documentation). 3. Ensure that the communication bus is closed at
each end, e.g. with a terminator.
6.5.7.3 Connecting the Data Cable for the Internal Communication of the
Cluster
In a cluster, the Sunny Island inverters communicate via a data cable (as
included in the scope of delivery of this inverter).
MASTER
SLAVE 1
SLAVE 2
A
B
NO C NC Relay 1
NO C NC Relay 2
NO C NC Relay 1
NO C NC Relay 2
NO C NC Relay 1
NO C NC Relay 2
Figure 8: Internal communication cabling (example)
Requirements: The total length of the communication bus (A+B) must be less
than 30 m. Keep in mind that the communication
bus possibly connects several nodes.
Procedure: 1. Plug the data cable into a free pin connector ComSync on the
Sunny Island (see Section 6.6.4, page 59). 2. Ensure that the communication
bus is closed at each end, e.g. with a terminator.
6.5.7.4 Connecting the Data Cable of the Multicluster-Box
For a multicluster system, the Multicluster-Box communicates with the master
of the main cluster via a black data cable (see Multicluster-Box
documentation). The black data cable is part of the scope of delivery of the
Multicluster-Box.
Requirements: The total length of the communication bus must not exceed 30 m.
Keep in mind that the communication bus
possibly connects several nodes.
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Cable requirements: Classification: CAT5e Type of plug: RJ45
Procedure: 1. Plug the black data cable into a free pin connector ComSync on
the Sunny Island (see Section 6.6.4, page 59). 2. Connect the other end of the
black data cable to the Multicluster-Box (see Multicluster-Box documentation).
3. Ensure that the communication bus is closed at each end, e.g. with a
terminator.
6.5.7.5 Connecting Control and Measuring Cables of the Multicluster-Box
For a multicluster system, the Multicluster-Box communicates control and
measuring data with the 3 Sunny Island inverters of the main cluster via 3 red
data cables (see Multicluster-Box documentation). The red data cables are part
of the scope of delivery of the Multicluster-Box.
Cable requirements: Cable length for BatVtgOut, DigIn, and BatTemp: less than
30 m
Procedure: · Plug the red data cables into the pin connector BackupVtgCur on
the Sunny Island units of the main cluster (see Section 6.6.4, page 59).
Connect the master with the connection Mstr./L1, slave 1 with the connection
Slv1./ L2 and slave 2 with the connection Slv2./L3 on the Multicluster-Box.
6.5.7.6 Connecting the Data Cables for Multicluster Communication
In a multicluster system, the masters of the various clusters communicate with
each other (see Multicluster-Box documentation). An SISYSCAN.BGx communication
interface must be installed in each master when using a Multicluster-Box. If
the Sunny Island was ordered with the Communication for multicluster system
order option, SISYSCAN.BGx is installed in each master.
A
XXXXSXIX-XXXXXXX-XXX
B
IN SOysuCt an
OSyIUsnCTan
D
C
Figure 9: Design of the SISYSCAN.BGx
Position A B C D
Designation Mounting hole Type label SysCanIn pin connector SysCanOut jack
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Cable requirements: Classification: CAT5e Maximum cable length: 30 m
Procedure:
1. Ensure that the communication interface SI-SYSCAN.BGx is installed in each
master (see SI-SYSCAN-NR documentation).
2. Remove the terminator from the SysCanOut pin connector on the master of
the main cluster and plug it into the SysCanIn pin connector.
3. Plug the yellow data cable into the SysCanOut pin connector on the main
cluster master (see Section 6.6.4, page 59).
4. Plug the other end of the yellow data cable into the SysCanIn pin
connector on the master of the extension cluster 1.
5. Connect the other extension clusters with each other as described in steps
3 and 4. Remove the terminators for this.
6. Leave the terminator plugged into the unused SysCanOut pin connector. This
terminates the communication bus.
6.5.8 Connecting the Battery Temperature Sensor
With lead-acid batteries, the battery management of the Sunny Island inverter
must record the temperature of the connected battery.
Battery temperature sensor in a cluster Only the master measures the battery
temperature in a cluster.
· Connect the battery temperature sensor only to the master.
Requirements:
Cable length for BatVtgOut, DigIn, and BatTemp: less than 30 m
If cable lengths of 30 m and more are required for BatVtgOut, DigIn, and
BatTemp, suitable lightning protection precautions must be taken.
If the battery temperature sensor and the batteries are not installed with the
inverter in the same building, suitable lightning protection precautions must
also be taken.
Procedure:
NOTICE
Damage to the battery due to excessive charging voltage due to incorrectly
measured battery temperature Due to incorrect battery temperature measurement,
the battery inverter charges the battery with an incorrect amount of charging
voltage. Excessive charging voltage can damage the battery.
· Connect only the battery temperature sensor supplied.
· Attach the battery temperature sensor as described in the following step.
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2. Attach the battery temperature sensor in the center of the batterystorage
system, in the upper third of the battery cell. As a result, the battery
temperature sensor measures the temperature at the warmest point in the
battery-storage system.
6 Electrical Connection
3. Thread both insulated conductors of the sensor through a ferrite included
in the scope of delivery and connect to the terminals BatTmp on the Sunny
Island (see Section 6.6.6, page 61). In this case, the polarity is arbitrary.
6.5.9 Connecting the Battery Current Sensor in the Off-Grid System
When using lead-acid batteries, a battery current sensor can be installed for
precise measurement of the battery current. SMA Solar Technology AG also
recommends installing a battery current sensor when connecting DC loads or DC
energy sources. When connecting DC loads or DC energy sources, the SOC
calculation can only work correctly with the measured data from the battery
current sensor.
Relevant for off-grid systems
BATTERY
BATTERY FUSE
SUNNY ISLAND DC +
BATTERY CURRENT SENSOR
DC – BatCur +
BatCur –
Figure 10: Connection of the battery current sensor to the Sunny Island.
Cable requirements: Conductor type: copper wire Maximum cable length: 3 m
Conductor cross-section: 0.2 mm² to 2.5 mm² A measuring cable with
intrinsically safe current circuits must be used. For this purpose,
“intrinsically safe” means
that the cable is double-insulated and that, in the event of a short circuit,
the conductor melts but the insulation remains intact. In addition, the cable
is not combustible. Insulated conductors in the measuring cable must be
twisted.
Procedure: 1. Install the battery current sensor in the DC power cable between
the battery and the battery fuse.
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2. Connect the BatCur+ insulated measuring conductor to the side for connecting the battery fuse on the battery current sensor.
BatCur + BatCur –
Battery fuse
Battery
3. Connect the BatCur- insulated measuring conductor to the side for connecting the battery on the battery current sensor.
BatCur + BatCur –
Battery
Battery fuse
4. Thread both insulated conductors through a ferrite included in the scope of delivery and connect to the terminals BatCur+ und BatCur- on the Sunny Island (see Section 6.6.6, page 61).
6.5.10 Connecting the Control Cable for Autostart Generators
Relevant for off-grid systems
Autostart generators are started and stopped with a contact.
Signal generator or generator control in a cluster Slaves control the
generator less reliably than masters do.
· Connect the generator control preferably to the master. · In a multicluster
system, always connect the signal generator to the master of the main cluster.
EXTERNAL GENERATOR
SUNNY ISLAND
NO C
Start Relay
Figure 11: Connecting the Generator Control to Sunny Island
Requirements: The technical requirements of the multifunction relay must be
met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2
mm² to 2.5 mm²
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Procedure:
WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
2. The default setting of the Sunny Island uses the multifunction relay
Relay1 for generator requests. Therefore, connect the control cable to the
multifunction relay Relay1 on the Sunny Island. Use the C and NO connections.
3. If the multifunction relay Relay1 for generator requests is not available,
connect the control cable to the multifunction relay Relay2 on the Sunny
Island. Use the C and NO connections.
4. If, with more than one Sunny Island, the multifunction relay Relay1 and
Relay2 for generator requests are not available on the Master, connect the
control cable to a free multifunction relay on slave 1 or slave 2. Use the C
and NO connections.
5. Enter the configuration Automatic generator request in the table of
settings (see Section 7.10.2, page 102).
6.5.11 Connecting a Signaler for Generators Without an Autostart Function
Relevant for off-grid systems
Generators without an autostart function do not have electric starting
devices. If you install a generator without an autostart function, you can
connect a signal generator (e.g., signal lamp) to the multifunction relay of
the Sunny Island inverter. As a result, the Sunny Island can signal when the
generator is to be manually started and stopped.
Signal generator or generator control in a cluster Slaves control the
generator less reliably than masters do.
· Connect the generator control preferably to the master.
· In a multicluster system, always connect the signal generator to the master
of the main cluster.
STAND-ALONE GRID PE N L
SIGNAL GENERATOR
AC1
SUNNY ISLAND
PE N L NO
C
Relay
EXTERNAL GENERATOR
PE N L
AC2
Figure 12: Connecting a Signal Generator to Signal a Generator Request
(Example)
Requirements: The technical requirements of the multifunction relay must be
met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2
mm² to 2.5 mm²
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Procedure:
WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
2. The default setting of the Sunny Island uses the multifunction relay
Relay1 for generator requests. Therefore, connect the control cable to the
multifunction relay Relay1 on the Sunny Island. Use the C and NO connections.
3. If the multifunction relay Relay1 for generator requests is not available,
connect the control cable to the multifunction relay Relay2 on the Sunny
Island. Use the C and NO connections.
4. If, with more than one Sunny Island, the multifunction relay Relay1 and
Relay2 for generator requests are not available on the Master, connect the
control cable to a free multifunction relay on slave 1 or slave 2. Use the C
and NO connections.
5. Enter the configuration Automatic generator request in the table of
settings (see Section 7.10.2, page 102).
6.5.12 Connecting Load-Shedding Contactors
Relevant for off-grid systems
Load shedding prevents battery deep discharge and controls the supply of energy to the loads. Load shedding provides the option of disconnecting specific loads from the system.
Load shedding is necessary for an off-grid system that is exclusively supplied with PV energy or wind energy.
The Sunny Island controls up to two load-shedding contactors depending on the state of charge of the battery. You can install two types of load shedding:
· One-level load shedding If the battery state of charge limit has been reached, one load-shedding contactor disconnects all loads at the same time. Depending on the configuration, the load-shedding contactor closes when the battery has been sufficiently charged or when the stand-alone grid has been switched to an external energy source.
· Two-level load shedding In two-level load shedding, there are two thresholds for the state of charge of the battery in order to control two load-shedding contactors. When the first threshold for the state of charge of the battery is reached, the first loadshedding contactor disconnects a group of loads. When the second threshold for the state of charge of the battery is reached, the second load-shedding contactor disconnects the remaining loads.
LOAD-SHEDDING CONTACTOR A1
SUNNY ISLAND NO
C
ReRlealyay2
BatVtg
A2
_
+ Figure 13: Connection of control cable for 1-stage load shedding (example)
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Specifications for load-shedding configuration:
Load shedding in a multicluster system One-level load shedding is integrated
into the Multicluster-Box. The load-shedding contactor is controlled directly
by the master of the main cluster via communication with the Multicluster-Box.
If you install an additional loadshedding contactor in a multicluster system,
it is controlled with a multifunction relay in the master of extension cluster
- Additional load-shedding contactors cannot be controlled by the main cluster.
Load-shedding contactors in a cluster
If you connect load-shedding contactors to the master, limited operation is
possible in the event of a disturbance. Slaves can control the load-shedding
contactors less reliably in the event of a fault. In the event of a
disturbance, the slave may wait for confirmation from the master.
The following values are stored in the user interface of the Sunny Island for setting the load-shedding system. If you connect load-shedding contactors, consider the effects in the system and comply with the instructions for use.
Value
System effects
Application
1-stage load-shedding scheme (Load shedding 1)
If the Sunny Island has activated the load-shedding system and then an external energy source is connected, the load-shedding process is terminated immediately (regardless of the battery’s state of charge). The external energy source is then supplying the loads. The battery is only charged with the excess energy.
· Works only in off-grid and battery-backup systems
1stage load-shedding Setting for 1-stage load-shedding scheme or the first
scheme or first stage in stage of a 2-stage load-shedding scheme. Load shed-
terms of two-stage load- ding is only stopped when the battery has been suffi-
shedding schemes
ciently charged. This setting affects the system behavior
(Load shedding 1)
regardless of whether an external energy source is
present.
· Suitable in systems for increased self-consumption (battery-storage systems)
Second stage in terms of 2-stage load-shedding scheme (Load shedding 2)
Settings for second load-shedding contactor in terms of a 2-stage load- shedding scheme. Load shedding is only stopped when the battery has been sufficiently charged.
· Suitable in off-grid systems, battery-backup systems and systems for increased selfconsumption
Load shedding in multicluster system (Load shedding 1)
In a multicluster system, this setting is intended for additional 1-stage load-shedding. When the battery state of charge of a cluster falls below a set value, the loadshedding process begins. The load shedding only ends when the batteries of all clusters have reached the set value of the battery state of charge. How long it takes to reach this value depends on the battery technology used and the selected battery capacity. If different battery technologies and different battery capacities are combined in the clusters of a multicluster system, the display values for the individual clusters may vary.
· Only for multicluster systems
Requirements: The technical requirements of the multifunction relay must be
met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2
mm² to 2.5 mm²
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6 Electrical Connection
SMA Solar Technology AG
Procedure: 1. Ensure that the load-shedding contactor only disconnects loads
from the system. This ensures that the battery can be recharged from AC
sources in the system.
2. Observe default setting of the battery inverter The default setting of the
battery inverter uses the multifunction relay Relay2 for load shedding. ·
Before connecting the load shedding device, check whether the multifunction
relay Relay2 is available.
3. If the multifunction relay Relay2 is available, connect the multifunction
relay Relay2 for load shedding 4. If the multifunction relay Relay2 is not
available, connect the multifunction relay Relay1 for load shedding 5. Write
down the terminal assignment of the load shedding terminal for setting the
multifunction relays. Tip: Use the
table provided in this document (see Section 7.10.2, page 102).
Connecting the multifunction relay Relay2 for load shedding
1. Connect the insulated conductor for coil connection A1 of the load-
shedding contactor on the Sunny Island to terminal Relay2 NO (see Section
6.6.5, page 60).
2. Connect the insulated conductor for coil connection A2 to terminal
BatVtgOut- (see Section 6.6.6, page 61).
3. Connect terminal BatVtgOut + to terminal Relay2 C. Use the same conductor
cross-section as that of the cable for the load-shedding contactor.
Connecting the multifunction relay Relay1 for load shedding
1. Connect the insulated conductor for coil connection A1 of the load-
shedding contactor on the Sunny Island to terminal Relay1 NO (see Section
6.6.5, page 60).
2. Connect the insulated conductor for coil connection A2 to terminal
BatVtgOut- (see Section 6.6.6, page 61)
3. Connect terminal BatVtgOut + to terminal Relay1 C. Use the same conductor
cross-section as that of the cable for the load-shedding contactor.
6.5.13 Connecting the Time Control for External Processes
The Sunny Island has two timers for time-dependent control of external
processes. For each timer, you can set the starting day and time that the
multifunction relay is to be switched once, daily or weekly.
Requirements: The technical requirements of the multifunction relay must be met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2 mm² to 2.5 mm²
Procedure:
WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
2. Connect the control cable on the Sunny Island to either multifunction
relay Relay1 or Relay2. Use the C and NO connections.
3. During configuration, enter the value TM1 for timer 1 or the value TM2 for
timer 2 in the table of settings (see Section 7.10.2, page 102).
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6 Electrical Connection
6.5.14 Connecting Message Devices for Operating States and Warning Messages
You can connect message devices to the multifunction relays to allow operating
states and warning messages from the Sunny Island inverter to be output. 1 of
the following operating states and warning messages can be displayed for each
multifunction relay:
· The generator is running and connected. · Voltage and frequency of the
utility grid are within the range for connection. · A Sunny Island displays an
error message of level 2 or higher. Only the error messages within a cluster
are
evaluated here. A different control logic of level 2 ensures that the error
message will also be displayed in the case of automatic shutdown:
When an error message of level 2 is pending, the multifunction relay is
deactivated. When no error message is pending, the multifunction relay is
activated. · A Sunny Island displays a warning. Only the warnings within a
cluster are evaluated here. · The Sunny Island is in operation in a single
system. · The respective cluster is in operation in a cluster system. · The
Sunny Island is in derating in a single system. · The respective cluster is in
derating in a cluster system.
Table with settings for multifunction relays:
Value
Version
Relay is activated when the generator is run- The generator is running and connected. ning
Relay is activated when an external source is Voltage and frequency of the generator are within the range for con-
available
nection.
Relay is activated when the utility grid is available
The utility grid is connected in the off-grid system.
Relay is deactivated in the event of an error A Sunny Island displays an error message of level 2 or higher.
Relay is activated in the event of a warning A Sunny Island displays a warning.
Relay is activated when the cluster is running In a single system, the Sunny Island is operating, or in a cluster system, the cluster is operating.
Relay is activated in the event of power limi- In a single system, a Sunny Island is in derating, or in a cluster sys-
tation
tem, the cluster is in derating.
Requirements: The technical requirements of the multifunction relay must be
met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2
mm² to 2.5 mm²
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Procedure:
WARNING
Danger to life from electric shock due to incorrect insulation In the case of
faulty insulation, supposedly de-energized parts or cables may be live.
Touching live components or cables can result in death or serious injury due
to electric shock.
· When making the following connections, always insert a silicone tube (see
Section 6.6.5, page 60).
2. Connect the control cable on the Sunny Island to either multifunction
relay Relay1 or Relay2. Use the C and NO connections.
3. Enter the selected configuration in the table with the settings for the
multifunction relays (see Section 7.10.2, page 102).
6.5.15 Connecting the Battery Room Fan
If the charging current leads to the emission of gases from the battery, the
battery room fan is switched on by the Sunny Island for at least one hour.
Requirements: The technical requirements of the multifunction relay must be met (see Section 16, page 175).
Cable requirements: Conductor type: copper wire Conductor cross-section: 0.2 mm² to 2.5 mm²
Procedure: The battery management of the Sunny Island inverter is able to
control one battery room fan for each battery. The following options result
for the connection:
· Control a separate battery room fan for each battery. · Control one battery
room fan for all batteries. This is only an option with multicluster systems.
Controlling a separate battery room