SMA Sunny Boy SB 1100LV User manual

Sunny Boy SB 1100LV
Inverter for Photovoltaic Plants
Installation Guide Version 1.1 SB1100LV-11:SE2006
IME-SB1100LV

SMA Technologie AG Table of Contents
Installation Guide SB1100LV-11:SE2006 Page 3
Inhaltsverzeichnis
1 Explanation of the symbols used: . . . . . . . . . . . . 5
2 Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Target group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Unit description . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 External dimensions . . . . . . . . . . . . . . . . . . . . . . . 12
5 Installation requirements . . . . . . . . . . . . . . . . . . 13
5.1 Installation site requirements . . . . . . . . . . . . . . . . . 13
5.2 PV generator requirements. . . . . . . . . . . . . . . . . . . 15
5.3 Low voltage grid (AC). . . . . . . . . . . . . . . . . . . . . . 15
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Mounting the unit . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.1 Connecting the AC output. . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6.2.2 PV string (DC) connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.3 Reverse current. . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7 Opening and closing the Sunny Boy . . . . . . . . . 33
7.1 Opening the Sunny Boy . . . . . . . . . . . . . . . . . . . . 33
7.2 Closing the Sunny Boy . . . . . . . . . . . . . . . . . . . . . 33
8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.1 PV generator connection data . . . . . . . . . . . . . . . . 35
8.2 Grid connection data . . . . . . . . . . . . . . . . . . . . . . 36
8.3 Device description . . . . . . . . . . . . . . . . . . . . . . . . 37
8.4 Operating parameters. . . . . . . . . . . . . . . . . . . . . . 38

Table of Contents SMA Technologie AG
Page 4 SB1100LV-11:SE2006 Installation Guide
8.4.1 Explanation of the operating parameters . . . . . . . . . . . . . . . . .38
8.4.2 Parameter settings for Germany. . . . . . . . . . . . . . . . . . . . . . . .41
8.4.3 Country-specific parameter settings . . . . . . . . . . . . . . . . . . . . .42
8.4.4 Non-modifiable parameters. . . . . . . . . . . . . . . . . . . . . . . . . . .43
9 Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.1 CE declaration of conformity . . . . . . . . . . . . . . . . . 45
9.2 SMA grid guard certificate . . . . . . . . . . . . . . . . . . 46
10 Replacing the varistors. . . . . . . . . . . . . . . . . . . . 47
11 Rating for a line circuit breaker . . . . . . . . . . . . . 51
12 The communications interface . . . . . . . . . . . . . . 55
12.1 Connection of the interface . . . . . . . . . . . . . . . . . . 56
12.1.1 Jumper functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
13 Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

SMA Technologie AG Explanation of the symbols used:
Installation Guide SB1100LV-11:SE2006 Page 5
1 Explanation of the symbols used:
To ensure optimum use of these instructions, please note the following explanation of
symbols used.
This symbol identifies an example.
This symbol identifies a notice where failure to follow the advice will make the
procedure or operation more difficult.
This symbol indicates a fact that when not observed could result in
damage to components or danger to persons. Please read these sections
especially carefully.

Explanation of the symbols used: SMA Technologie AG
Page 6 SB1100LV-11:SE2006 Installation Guide

SMA Technologie AG Foreword
Installation Guide SB1100LV-11:SE2006 Page 7
2 Foreword
For detailed information on troubleshooting and on how to use the Sunny Boy and the
various communications options, please see the operating instructions.
"Sunny Design" helps you design the system and check string size taking the relevant
inverter into consideration. Further information on Sunny Design is available at
www.SMA.de.
If you require further information, please call the Sunny Boy hotline on the following
number:
(0561) 95 22 - 499
2.1 Target group
This installation manual is intended solely for qualified electricians. Its aim is to help
install and set up SMA Sunny Boy SB 1100LV inverters quickly and correctly.
The Sunny Boy SB 1100LV contains the SMA grid guard 2. This is a type of
independent disconnection device. It ensures that the Sunny Boy SB 1100LV
complies with the VDEW (Verband der Elektrizitätswirtschaft – German Electricity
Industry Association) regulations for the connection and parallel operation of
electrical power units to the low-voltage grid of the electricity supply company and
with DIN VDE 0126-1-1, which forms a part of these regulations.
Attention!
The Sunny Boy may only be installed by trained specialists. Installers must
be approved by the local energy supplier. Please carefully read this
installation manual. All prescribed safety regulations, the technical
connection requirements of the local energy supplier and all applicable
provisions must be adhered to.

Foreword SMA Technologie AG
Page 8 SB1100LV-11:SE2006 Installation Guide

SMA Technologie AG Safety instructions
Installation Guide SB1100LV-11:SE2006 Page 9
3 Safety instructions
Caution! Overvoltage
Check the system design using the "Sunny
Design" design tool (www.SMA.de) or by
calling the Sunny Boy Hotline.
Overvoltages may lead to the destruction
of the Sunny Boy SB 1100LV.
Warning! High voltage!
Work on the Sunny Boy with the cover removed must be carried out by a
qualified electrician. High voltages are present in the device. Before
working on the Sunny Boy with the cover removed, the AC and DC
voltages must be disconnected from the Sunny Boy and the capacitors
must be discharged.
The Sunny Boy must be disconnected from the mains grid and precautions
must be taken to prevent the grid being reconnected. In addition, the
connections to the PV generator must be disconnected.
After isolating the AC and DC voltage, you must wait approx. 30 minutes
for the capacitors in the Sunny Boy to discharge. Only then is it safe to
open the unit by removing the cover. You must also make sure that no
voltage is present in the device.
Caution! Electrostatic charge!
When working on the Sunny Boy SB 1100LV and handling the
components, remember to observe all ESD safety regulations. Electronic
components are susceptible to electrostatic charge. Discharge any
electrostatic charge by touching the grounded enclosure before handling
any electronic component.

Safety instructions SMA Technologie AG
Page 10 SB1100LV-11:SE2006 Installation Guide

SMA Technologie AG Overview
Installation Guide SB1100LV-11:SE2006 Page 11
4 Overview
4.1 Unit description
The following diagram gives a schematic overview of the various components and
connection points inside the Sunny Boy SB 1100LV with the cover removed:
Varistors,
page 47
Socket for communication
(RS232, RS485, NLM Piggy-
Back, Radio), page 59
Sunny Display
PV input terminal
(DC), page 26 PE (protective earth)
connecting cable for
cover
Flat connection for grounding the
cable shield for RS232 and
RS485 communications
Communications
connector
Connection plug
(AC), page 21
Jumper for
communication
Operating status
LEDs

Overview SMA Technologie AG
Page 12 SB1100LV-11:SE2006 Installation Guide
4.2 External dimensions
434 mm
214 mm
295 mm

SMA Technologie AG Installation requirements
Installation Guide SB1100LV-11:SE2006 Page 13
5 Installation requirements
Please check that all of the conditions listed below are met before installing and setting
up the Sunny Boy.
5.1 Installation site requirements
The Sunny Boy SB 1100LV weighs approx. 29 kg. Please take this
weight into account when choosing the installation site and method
of installation.
The Sunny Boy SB 1100LV should be installed in a place where it is not exposed to
direct sunlight. An increased ambient temperature can reduce the yield of the PV
system.
The Sunny Boy is designed to be mounted on a vertical wall. If absolutely necessary,
however, the Sunny Boy can be installed tilted back at a maximum angle of 45°. For
an optimum energy yield and the most convenient operation, vertical installation at eye-
level is preferable. If installing the unit outdoors, make sure that it is not slanting forward.
The rear panel is designed such that the Sunny Boy SB 1100LV is tilting slightly
backward on a perfectly vertical wall.
We advise against installing the unit in a horizontal position outdoors.
The ambient temperature must not be outside the -25 °C to +60 °C range.
29 kg
Never install the inverter horizontally
or so that it tilts forward.
Install the inverter vertically or tilting
backward.

Installation requirements SMA Technologie AG
Page 14 SB1100LV-11:SE2006 Installation Guide
When choosing the installation site, be sure to note the following:
When choosing the installation site, ensure there is enough space for heat to dissipate.
Under normal conditions, the following guidelines should be applied for the space to
be kept clear around the Sunny Boy SB 1100LV:
In domestic installations, the unit should not be
mounted on plasterboard walls or similar as
otherwise audible vibrations are likely to result.
We recommend securing the unit to a solid surface.
The Sunny Boy makes noises when in use which can,
in the domestic setting, be seen as a nuisance.
Warning! Risk of burns!
The temperature of individual parts of the case and components within the
Sunny Boy can reach more than 60 °C. Touching could result in burns!
Do not install the Sunny Boy on flammable construction materials, in areas
where highly inflammable materials are stored or in potentially explosive
environments!
Minimum clearance
Sides 20 cm
Top 20 cm
Underneath 20 cm
Front 5 cm

SMA Technologie AG Installation requirements
Installation Guide SB1100LV-11:SE2006 Page 15
5.2 PV generator requirements
The Sunny Boy SB 1100LV is internally designed to be connected directly to up to two
strings (PV modules wired in series) having a homogenous structure (modules of the
same type, identical orientation and tilt).
For connecting the PV generators, the unit has two DC terminal blocks, which each have
connections for two strings. If you want to connect more than two strings to the Sunny
Boy SB 1100LV, you must use a DC distribution box.
The DC side must be equipped with a DC circuit breaker compliant to DIN VDE 0100-
712 to allow the PV generator to be disconnected from the Sunny Boy.
"Sunny Design" helps you design the system and check string size taking the relevant
inverter into consideration. Further information on "Sunny Design" is available at
www.SMA.de.
5.3 Low voltage grid (AC)
The Sunny Boy must have a three-conductor connection to the mains grid (live (L),
neutral (N), protective earth (PE)).
The grid connection terminals on the AC connection
socket included in the accessories kit can take wires
with a cross-section of up to 2.5 mm². The
accessories kit also contains a PG13.5 AC
connection socket for connecting cables with a cable
diameter between 9 mm and 13.5 mm, while the
PG16 connection socket is used for cables with cable
diameters from 13.5 mm up to a maximum of 17 mm. For detailed instructions, see
chapters "Connecting the AC output with PG13.5" (Page 22) and "Connecting the AC
plug with PG16" (Page 24).
The Sunny Boy SB 1100LV operates with high currents on the DC side. If there is
a fault in a string, the current of this string is routed via another string as reverse
current. This can irreparably damage the PV generators. See chapter 6.3
"Reverse current" (Page 27) for more information.
Limit values for DC input
Max. voltage 60 V (DC)
Max. input current 62 A (DC)
W
ire
cross-section
Ca
bl
e
diameter

Installation requirements SMA Technologie AG
Page 16 SB1100LV-11:SE2006 Installation Guide
Rating for a line circuit breaker in a photovoltaic electrical power unit
operated in parallel with the low-voltage grid
Various factors should be taken into account when selecting line circuit breakers. These
include, for example:
• The type of cable used (conductor material and insulation)
• Ambient temperatures affect the cables (higher temperatures result in a reduced
maximum current load)
• Method of routing the cable (reduces the ampacity of the conductor)
• Bundling cables together (reduces the ampacity of the conductor)
• Loop impedance [Z] (in the event of a body contact this limits the current that can
flow and therefore determines the response behavior of the circuit breaker)
• Sufficient distance between the circuit breakers so as to avoid undue heating (heat
can trigger the circuit breakers early).
• Selectivity
• Protection class of the connected load (VDE 0100, part 410, Protection against
electric shock)
The following standards should be followed in all cases:
• DIN VDE 0298-4 (Cable routing and current-carrying capacity)
• DIN VDE 0100; part 430 (Protective measures; protection of cable and cords
against overcurrent)
• DIN VDE 0100; part 410 (Protective measures; protection against electric
shock)
Attention!
We recommend using a 16 A line circuit
breaker to protect the power circuit. No
loads should be connected to this power
circuit.
Please pay attention to chapter 11 "Rating for a line circuit breaker" (Page 51).

SMA Technologie AG Installation requirements
Installation Guide SB1100LV-11:SE2006 Page 17
AC cable system impedance should not exceed 1 ohm. This is necessary, amongst other
things, for the correct operation of impedance observation. In addition, we recommend
dimensioning the conductor cross-section so that line losses do not exceed 1% at the
nominal power. Line losses depending on the cable length and cross-section are shown
in the graph below. Multi-wire cables with copper forward and return conductors are
used.
The maximum cable lengths for the different cable cross-sections are as follows:
Conductor cross-section 1.5 mm² 2.5 mm²
Max. length 21 m 35 m
Do not use cables where the losses will exceed 1.0%
Cable length
Line losses

Installation requirements SMA Technologie AG
Page 18 SB1100LV-11:SE2006 Installation Guide
The Sunny Boy SB 1100LV is designed for operation on 220 - 240 V grids with a grid
frequency of 50 Hz. When connecting an inverter to the public grid, please adhere to
the local connection requirements of your grid operator.
Limit values for AC output
Voltage range
(complying with DIN VDE 0126-1-1)
198 V ... 253 / 260 V a
Frequency range
(complying with DIN VDE 0126-1-1)
47.55 Hz ... 50.2 Hz
Voltage range
(extended operating range)
180 V ... 265 V
Frequency range
(extended operating range)
45.5 Hz ... 54.5 Hz
a The Sunny Boy can feed into the public grid at a maximum output voltage of
260 V for brief periods. However, DIN VDE 0126-1-1 stipulates that the
average voltage over 10 minutes must not exceed 253 V. I.e., if the grid
voltage remains constant at 254 V, the inverter is automatically disconnected
from the grid. In this case, contact the local grid operator for assistance.
DIN VDE 0126-1-1 only applies in Germany. See chapter 8.4.3 "Country-
specific parameter settings" (Page 42) for the country-specific preset default
values of your inverter.

SMA Technologie AG Installation
Installation Guide SB1100LV-11:SE2006 Page 19
6 Installation
6.1 Mounting the unit
To make the job easier, we recommend you use the
supplied wall bracket to mount the Sunny Boy SB
1100LV. For vertical installation on solid concrete or
block walls, for example, you can fit the bracket
using 8 mm x 50 mm hexagon bolts to DIN 571
standard, stainless steel type, and with wall plugs
type SX8.
When selecting the mounting materials, be sure to
take into account the weight of the Sunny Boy SB
1100LV (29 kg).
1. Fit the wall bracket (1). To mark the positions to
drill the holes, you can use the wall bracket as
a drilling template.
2. Now hook the Sunny Boy SB 1100LV onto the
wall bracket (2) at its upper mounting plate so
that it cannot be moved sideways.
3. Fix the Sunny Boy SB 1100LV onto its bracket
by screwing the supplied M6x10 bolt into the
central threaded hole at the bottom of the
bracket (3).
4. Make sure the Sunny Boy SB 1100LV is
positioned securely on the bracket.

Installation SMA Technologie AG
Page 20 SB1100LV-11:SE2006 Installation Guide
6.2 Electrical installation
The complete wiring for a Sunny Boy SB 1100LV is shown schematically in the following
diagram:
* Circuit breaker according to DIN VDE 0100-712
Attention!
Make sure to check the polarity of the strings before connecting them!
Communication
max. 2.5 mm²
String
Circuit