SMA Sunny Island SI3300 Manual

BWRI33-12:EE1203
Bidirectional Battery Inverter SI3300
for Stand-alone Applications
Version 2.1
Installation & Operating Instructions
Sunny Island

Sunny Island Installation & Operating Instructions
BWRI33-12:EE - 2 - SMA Regelsysteme GmbH
Alteration Review
Document
number
BWRI33
Issue and type
of alteration 1) Comments Author
-01:EE1502 1.0 A Translation of German issue 1.3 Wollny
-01:EE3002 1.1 A Translation of chapter 14 Wollny
-01:EE3302 1.2 A Final English translation Wollny
-12:EE1203 2.1 A,C Changes due to Firmware Version 1.50 Sabban
1) A: Changes due to faulty documents or improvement of the documentation
B: Changes maintaining full or upward compatibility
C: Changes limiting or excluding compatibility
Name Date Signature
Approved Wollny

Sunny Island Installation & Operating Instructions
BWRI33-12:EE - 3 - SMA Regelsysteme GmbH
Explanation of Symbols used in this Document
To enable optimal usage of this manual and safe operation of the device during in-
stallation, operation and maintenance routines, please note the following description
of symbols:
This indicates a feature that is important either for optimal and comfort-
able usage or optimal operation of the system.
Example: “To keep string voltage low we recommend the following proce-
dure.”
This indicates a fact or feature which is very important for the safety of the
user and / or which can cause a serious defect if not applied appropri-
ately.
Example: ”Disconnect the mains plug before opening the case!“
This indicates an example.

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Contents
1 Introduction.........................................................................................................9
1.1 About these instructions...........................................................................10
1.2 What to do in case of transport damages?...............................................10
1.3 General Safety Instructions......................................................................11
2 System Description...........................................................................................12
2.1 Modularly Structured Power Supply Systems...........................................12
2.2 Functional Design of the Sunny Island.....................................................13
3 Installation.........................................................................................................15
3.1 Mounting Accessories Included in Delivery..............................................15
3.2 Placement of the Sunny Island.................................................................16
3.3 Electric Connection...................................................................................20
3.3.1 Preparing the Connection....................................................................21
3.3.2 Cable Connections...............................................................................22
3.4 Examples for Connection .........................................................................24
3.4.1 Connection to Ground..........................................................................25
3.4.2 Connection of the battery.....................................................................26
3.4.3 Connection of Battery Temperature Sensor ........................................28
3.4.4 Connection to AC Voltage....................................................................29
3.4.5 Connection to Generator Current and Voltage Measurement..............30
3.4.6 Connection of a Generator...................................................................31
3.4.7 Connection to an External Utility..........................................................34
3.4.8 Connection to Generator and Utility.....................................................37
3.4.9 Connection of a Battery Room Fan and Electrolyte Pump...................39
3.4.10 Connection of a Dump Load.............................................................40

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3.5 Finalization of Electrical Wiring.................................................................42
3.6 Interfaces for Communication...................................................................43
3.6.1 Assignment of COM1 Interface (Three-Phase Operation)...................44
3.6.2 Assignment of COM2 Interface............................................................45
3.7 Connection with Sunny Boy and Sunny Boy Control................................46
3.7.1 Simple Connection at COM2 Interface ................................................46
3.7.2 Multiple Connection at COM2 Interface...............................................48
3.7.3 Simple Connection to PC.....................................................................48
3.7.4 Alternative Communication at COM1 Interface....................................49
3.7.5 Assignment of COM3 Interface............................................................50
3.8 Communication in a Three-Phase Island Grid..........................................51
4 Operating Instructions.......................................................................................52
4.1 Display and Operating Elements..............................................................52
4.1.1 Key Assignment...................................................................................53
4.1.2 Contrast in Display...............................................................................53
4.1.3 Return to Status Display......................................................................54
4.1.4 Edit Mode.............................................................................................54
4.2 Menu Structure.........................................................................................55
5 First Commissioning of the Sunny Island..........................................................58
6 Configuration.....................................................................................................61
6.1 First Configuration (“New System“) ..........................................................62
6.2 Configuration after Battery Exchange (“New Battery“) .............................66
6.3 Configuration after Restart (“Restart”)......................................................68
7 Operation (OPERAT)........................................................................................69
7.1 Menu “START”(2-1), Operation of the Sunny Island...............................70
7.2 Menu “GENSET”(2-2), Operation of Generator.......................................71

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7.3 Menu “FUNCT“(2+3), Special Functions.................................................73
7.4 Menu „BHKW“(2+5), ecopower support ..................................................73
8 Settings (SETUP)..............................................................................................75
8.1 Menu “SETTIM“(3-1), Setting the System Clock .....................................76
8.2 Menu “PASSWD“(3-2), Entry of Password..............................................77
8.3 Menu “PARSYS“(3+3), Parameters System............................................78
8.4 Menu “PARGRD“(3+4), Parameters Grid................................................79
8.5 Menu “PARBAT“(3+5), Parameters Battery ............................................81
8.6 Menu “PARGEN“(3+6), Parameters Generator.......................................84
8.7 Menu “PARREL“(3+7), Parameters Relays.............................................89
8.8 Menu “PARSB“(3+8), Parameters Sunny Boy.........................................95
8.9 Menu “PARALL“(3+9), all Parameters.....................................................96
9 Operating Data (DATA).....................................................................................97
9.1 Menu „DATAV“(1-0), Overview of Measured Values...............................99
9.2 Menu “DATSYS“(1-1), System Data......................................................100
9.3 Menu “DATALL“(1-2), Overall Plant Data..............................................100
9.4 Menu “DATBAT“(1+3), Battery Data......................................................101
9.5 Menu “DATGRD“(1+4), Grid Data.........................................................104
10 Diagnosis (DIAG)............................................................................................106
10.1 Menu “ACKN“(4-1), Error Confirmation .................................................108
10.2 Menu “HISTOR“(4-2), Overall Protocol..................................................108
10.3 Menu “ERRHIS“(4-3), Error Protocol.....................................................109
10.4 Menu “EVTHIS“(4-4), State Protocol.....................................................109
11 Battery Management.......................................................................................110
11.1 Charging Methods..................................................................................111
11.2 Battery States.........................................................................................112

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11.3 Failure of Individual Cells .......................................................................115
12 Operating Modes ............................................................................................116
12.1 Grid-Forming Operation (RUN_U)..........................................................116
12.2 Grid-Tied Operation (RUN_I)..................................................................118
12.3 Overload Behavior..................................................................................119
13 Island Grids –Examples.................................................................................121
13.1 Single-Phase PV Island Grid with Generator .........................................121
13.2 Single-Phase PV Island Grid without Generator ....................................124
13.3 Single-Phase PV Island Grid with Generator and Utility.........................126
13.4 Three-Phase PV Island Grid with Generator..........................................128
14 Overview: Configurable System Parameters..................................................130
15 Overview: Measured Values Displayed ..........................................................146
16 Terminal Diagrams for Generator Options......................................................152
17 Error and Status Signals.................................................................................158
17.1 Error Signals...........................................................................................158
17.2 Status Signals (“Events“)........................................................................160
18 Technical Data................................................................................................163
19 Servicing and Maintenance.............................................................................166
20 Warranty and Liability Regulations .................................................................169
21 Declaration of Conformity ...............................................................................171
22 Contact ...........................................................................................................172
23 List of Figures .................................................................................................173
24 List of Tables...................................................................................................178

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Important Safety Notice:
The Sunny Island inverter may only be opened, installed and ser-
viced by qualified personnel. The device can still be charged with
very high hazardous voltages even when disconnected. Please
closely follow all steps as described in this document when working
on the inverter.

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1 Introduction
By purchasing a Sunny Island you have decided to use one of the most advanced
modular battery inverters. The Sunny Island complies with the according European
harmonized standards on electromagnetic compatibility as certified in the CE decla-
ration (see appendix).
In the following you will find the installation and operating instructions of the Sunny
Island battery inverter. Don’t worry about the size of the document, it is not neces-
sary to read everything at once. This is both installer’s guide and user manual, so it
is used as reference for the commissioning and as guideline on how to use all func-
tions of the inverter optimally and how to extend your existing PV-plant. For detailed
information on system realization, functions and the integrated battery and load
management please refer to the Product Description.

Sunny Island Installation & Operating Instructions
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1.1 About these instructions
This document contains important information for the installation and commissioning of
the Sunny Island as well as its safe operation. Please read these instructions carefully
before starting the inverter. The inverter must be installed and commissioned by quali-
fied personnel. Work must be carried out according to the local installation and safety
regulations. Please also refer to our warranty and liability terms at the end of this docu-
ment.
This version of Installation and Operating Instructions considers the new features of
Firmware BFR 1.50 / DSP 1.50 and higher. Basically, these Instructions continue to
refer to inverters with firmware BFR 1.10, however discrepancies concerning the pa-
rameters/data available can arise. Please note that changes have been made com-
pared to earlier versions (before Firmware BFR 1.10) as regards generator control
(allocation of relays), (see chapter 3.4.6).
1.2 What to do in case of transport damages?
Our products are thoroughly checked before they are shipped. Even though they are
delivered in sturdy packaging (which can be recycled) the inverters can be damaged
in transit which is usually the forwarder’s fault.
Please inspect your inverter thoroughly after it has been delivered. If any damages
can be detected on the packaging that could make you conclude the contents is
damaged or if you detect any damage please immediately notify the forwarding com-
pany.
SMA or your local supplier can help you in this matter. In any case a declaration of
transport damage must be made within six days upon receipt of the product and
must be stated in writing directly to the forwarding agent.

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1.3 General Safety Instructions
The Sunny Island is only suitable for installation in closed rooms.
Therefore do not expose it to humidity, rain or direct sunlight.
The inverter is designed for use in places up to 2000 m (6561 ft)
above sea-level.
Make sure there is sufficient air circulation in the battery room. Bat-
teries can develop an explosive gas mixture in normal operation.
Use specialized tools when mounting and wiring the storage battery
(risk of short circuit).
As a precaution against injuries wear suitable clothes for handling
heavy and unwieldy devices when mounting and removing the Sun-
ny Island (such as working gloves and safety shoes).
The device may only be opened, installed and serviced by a qualified
electrician. Even when disconnected there can be high touch volt-
ages within the device. Please see our detailed description of how to
handle the Sunny Island and closely follow all instructions!
Under certain circumstances the Sunny Island may start up autono-
mously! Keep this in mind when working on the island grid and al-
ways switch off the AC fuses of all Sunny Islands in the island grid!

Sunny Island Installation & Operating Instructions
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2 System Description
2.1 Modularly Structured Power Supply Systems
The supply of small decentralized consumers which cannot be connected to a public
grid is of large relevance world-wide, particularly in developing and threshold coun-
tries. This is an almost ideal application for isolated “off grid“photovoltaic power sup-
ply systems. Experience with such systems in an output range of 2-10 kW has
shown that they should not only be very reliable, economical and robust, but above
all modularly structured and therefore easily expandable later on. Only a simply
structured and flexible system design for these PV power supply systems will enable
widespread application.
The central component of such a modular power supply system is the battery in-
verter Sunny Island®. Intelligent system management and control not only allow to
supply different consumers, but also to connect the SMA Sunny Boy®String Inverters
for supplementary grid feeding. The connection of small wind energy converters or
diesel generator sets will also be possible.
On the AC voltage side the battery inverter must take over the complex control of
voltage, reactive power and frequency as well as power management and uses the
battery as a buffer.
On the DC voltage side the battery inverter makes sure to provide a best possible
battery handling. To this end it ensures that the temperature-dependent and current-
dependent voltage limits are complied with, full charge cycles are run regularly and
the charging methods are adapted to the battery type and the specific ambient condi-
tions.
Using this system-compatible battery inverter lets you reduce planning, execution
and system costs for PV island supply considerably.

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2.2 Functional Design of the Sunny Island
The bi-directional Sunny Island consists of a Cuk DC/DC converter, an inverter and a
control and system management.
The DC/DC converter supplies the DC link circuit with an app. constant 380 V DC.
Electric energy can charge the battery and can be extracted from the battery as well.
The inverter consists of a full bridge and provides sinusoidal output voltage through a
filter. It can be operated in all four quadrants.
For control and management of the battery inverter it has a double processor con-
cept with a closed loop control processor (DSP, digital signal processor) and a man-
agement system processor. The system management processor performs overall
control, data acquisition and communication. The power unit is mainly controlled by
the DSP.
Fig. 2.1 shows the three basic components of the battery inverter.
63 A DC 16 A AC
Bat. Temp.
DieselVoltage
Battery
60 V Island Grid
230 V, 50/60 Hz
Diesel Current
Relay K1
Control
System
Management
Display
=
COM 1
COM 2
Service COM 3
Relay K2
Relay K4
Relay K3
Relay K5
Relay K6
Relay K8
Relay K7
Communi-
cation
Three-Phase
Operation
Fig. 2.1: Components of the battery inverter

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The purpose of the power unit control is to tune output voltage during inverter opera-
tion into sinus-shape to guarantee constant supply to consumers.
In inverter operation grid voltage is controlled to 230 V / 50 Hz or 60 Hz. The system
management can define other rms voltage values depending on the degree of bat-
tery charge, grid voltage and voltage of a connected diesel generator. In current-
controlled operation there can be synchronization to an external power supply unit
(grid, diesel generator). In that operating mode the battery is e. g. charged to a de-
fined degree.

Sunny Island Installation & Operating Instructions
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3 Installation
The Sunny Island may only be installed by a qualified technician.
Please read the corresponding chapters carefully. All installation
work must be executed in compliance with the relevant standards.
Please follow the general safety instructions (chapter 1.3).
3.1 Mounting Accessories Included in Delivery
Please find below the components ensuring easy mounting and installation of the
Sunny Island which are included in delivery:
1 Installation and Operating Instructions
1 Slide for recommended mounting to wall (Fig. 3.2)
4 PG 13.5 glands incl. nuts
4 PG 13.5 blank screwed joints
3 PG 16 glands incl. nuts
3 Alkali manganese battery cells
1 Plug for battery temperature sensor
1 Plug “Diesel I U“
The following components can be delivered as an option:
• Pt100 contact sensor to determine the battery temperature (SMA order name
“SI-BTS“). It is indispensable to connect a temperature sensor.

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• Battery fuse box for the protection of the DC cables (SMA order names “SI-
BATCASE.01”(for connection of a single Sunny Island) and/or “SI-
BATCASE.03”(for connection of up to three Sunny Islands).
• Three-phase synchronization cable (connection between the different Sunny
Islands in three-phase operation, SMA order name “SI-Synckabel-Set“).
• Plug-in relay to switch loads or start/stop diesel generator etc. (SMA order
name “SI-BPRE“(NO-type) resp. “SI-BPRE-OE”(NC-type)).
• 24 V auxiliary supply output port for special plant interconnections (see chapter
3.4), (SMA order name “SI-BP24“).
• RS485 interface or RS232 interface as Piggy-Back.
• Installation box for convenient connection of a mobile generator (SMA order
name “SI-GENCASE.01”).
• Kit for update of the Sunny Island firmware (SMA order name ”SI-UPDATE”).
3.2 Placement of the Sunny Island
The Sunny Island is a highly integrated, electronic device which is extremely sensitive
to moisture within the enclosure.
The Sunny Island is not suitable for outdoor installation.
For overall planning of your plant it is important to select a favorable location for the
inverter/s. The following criteria are meant to help you decide where to position the
Sunny Island:
Criteria for placement:
• Installation only possible indoors due to protection degree IP20.
• Do not expose the inverter to direct or indirect humidity.

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• Keep cables leading to the battery storage as short as possible (DC cabling).
• Avoid installing in the living area as slight noise emission is possible.
• Avoid mounting on resonant parts and easily combustible materials (e. g. thin
wooden panels, plaster panels, etc.)
• Provide accessibility for installation and later service.
• Installation at level height makes it possible to easily view the display and press
the keys.
Please note the following points in any case:
• The mounting background must be firm (weight of inverter
approx. 45 kg).
• The ambient temperature must be between -25 °C and +45 °C.
• If the Sunny Island is transferred from a cold to a warm place,
wait for a sufficient time (at least 15 minutes) before commis-
sioning so that any moisture condensation that might have oc-
curred can evaporate.
• A minimum distance of 20 cm must be clear above the inverter
for ventilation, i.e. no cabinets, ceiling, etc.
• The free air circulation around the case must not be obstructed
to ensure sufficient cooling.
• If you install the Sunny Island in a cabinet or closet etc., the air
circulation must be sufficient for heat dissipation - provide ex-
ternal ventilation.
• The heat sink can reach a temperature of more than 80 oC.
• Provide a correct position of the battery inverter (see Fig. 3.1
and Fig. 3.2).

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Mounting on the wall
The Sunny Island is mounted on a mounting rail on a firm surface. Four screws and
the corresponding dowels are necessary. The screws and dowels are not included in
delivery and have to have a sufficient size. We recommend two 6 mm hexagon head
screws and 8 mm dowels for fastening on top (see Fig. 3.1).
Make sure the mounting slide is securely fastened as it carries the
inverter’s total weight.
After fastening and checking the secure position of the mounting slide the Sunny Is-
land is hung into the intended strap on the mounting slide and positioned with the cor-
rect orientation.
To prevent lifting up the Sunny Island is fastened on the wall with two screws (4.5 mm)
and the corresponding dowels (M6) (see below).

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Fig. 3.1: Mounting slide with fastening points

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Fig. 3.2: Side view of the Sunny Island with dimensions
3.3 Electric Connection
The electric connection of the Sunny Boy can be done once the device is correctly
mounted in its position.
The storage battery and the grid (connection to subdistribution) are connected to the
lower part of the Sunny Island. At the bottom of the enclosure there are seven heavy-
gauge conduit-threaded joints (four PG 13.5 and three PG16).