SC 100
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Central inverter
SUNNY CENTRAL 100 indoor / outdoor
Installation Guide
SC-100-IEN093231 | 98-4018331 | Version 3.1
EN
SMA Solar Technology AG Table of Contents
Table of Contents
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Explanation of the Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Checking and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.5 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.7 Special Hazards of Photovoltaic Systems. . . . . . . . . . . . . . . . . 10
3.8 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.9 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.10 Commissioning, Maintenance and Repair . . . . . . . . . . . . . . . . 12
3.11 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.12 Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.13 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Overview of Weights and Dimensions . . . . . . . . . . . . . . . . . . . 16
4.2 Transport Possibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Installation Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.1 Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.2 Minimum Workspace Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Installation Guide SC-100-IEN093231 3
Table of Contents SMA Solar Technology AG
5.1.3 Inverter Protection Rating / EMC / Sound Levels . . . . . . . . . . . . . . . . . . . . . 20
5.1.4 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 On-Site Inverter Installation . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Mounting on the Foundation. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1.1 AC Grid Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1.2 AC Control Voltage Connection (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.1.3 Handling the Connection Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1.4 Sensors and Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1.5 Inverter Communication Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1.6 Shield Contact Handling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1.7 Sunny String Monitor Communication Connection . . . . . . . . . . . . . . . . . . . . 33
7.1.8 Lightning and / or Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.1.9 PV Generator Power Connection (DC Connection) . . . . . . . . . . . . . . . . . . . 35
8 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 Cabling Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.3 Switch On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9 Appendix A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10 Appendix B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10.1 Technical Data SC 100 outdoor. . . . . . . . . . . . . . . . . . . . . . . . 42
10.2 Technical Data SC 100 indoor . . . . . . . . . . . . . . . . . . . . . . . . 45
11 Appendix C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
12 Appendix D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
13 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Notes on this Manual
1 Notes on this Manual
1.1 Validity
This installation guide covers the correct installation and commissioning of type SC 100 indoor /
outdoor SMA inverters.
1.2 Target Group
Only trained electricians approved by the responsible energy supply company may install and
commission the inverters. The instructions assume that you, the installer, are familiar with electrical
installations and know the corresponding rules and regulations.
Installation Guide SC-100-IEN093231 5
Notes on this Manual SMA Solar Technology AG
1.3 Explanation of the Symbols Used
The following types of safety warnings as well as general information appear in this document:
DANGER!
DANGER indicates a hazardous situation which, if not avoided, will directly result in death
or serious injury.
WARNING!
WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION!
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE!
NOTICE indicates a situation that can result in property damage if not avoided.
Information
INFORMATION provides tips that are valuable for the optimal installation and operation
of your product.
6 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Introduction
2 Introduction
Dear customer,
You have made a good choice in purchasing the Sunny Central solar inverter. To guarantee correct
connection and reliable operation of the device, please take note of the safety and installation
instructions in the following sections. The following extra documents are also available in addition to
the installation guide:
• Sunny Central user manual
• Sunny Central wiring diagrams
• Installation requirements (contains views of the inverter)
Sunny Central 100
2.1: Sunny Central SC100 Indoor / Outdoor front view
SMA
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Installation Guide SC-100-IEN093231 7
Safety Instructions SMA Solar Technology AG
3 Safety Instructions
The Sunny Central SC100 is built using the latest technology, according to recognized safety
standards. Despite this, hazard to users, third parties or equipment can arise during operation or when
working on the device. These hazards can be reduced to a minimum when the device is used
appropriately as directed.
Faults that affect or limit the safety of the device must be immediately rectified. Unauthorized
modifications and the use of spare parts not recommended by SMA So lar Tec hno log y AG m ay c aus e
fire, material damage and electrical shock. Unauthorized personnel must not have access to the
equipment.
Warning signs must always be clearly readable and immediately replaced if damaged.
3.1 Appropriate Usage
Appropriate use of the Sunny Central means following all instructions in the installation guide relating
to transport, installation, electrical connection, and commissioning of the equipment.
Any deviation from the installation guide instructions is regarded as inappropriate use of the
equipment. SMA Solar Technology AG accepts no responsibility or liability for any and all damage
resulting from inappropriate use of the equipment.
Appropriate use of the equipment also entails:
• Observation of the safety instructions listed here and in the following sections
• Observation of the instructions in the Sunny Central user manual
• Obse rvatio n of additi onal documenta tion fo r vari ants and options , such a s grounded oper ation
(GFDI) and the extended voltage range (EVR)
• Conformance to the device-dependent technical data
3.2 Personnel
Only qualified technical personnel may perform any and all work on the Sunny Central. "Qualified"
means that the personnel must possess training relevant to the activity performed.
For commissioning and operation of the Sunny Central inverter, the personnel must be familiar with
the content of the Sunny Central documentation. In particular, the safety instructions must be followed.
3.3 About this Manual
This manual was written with the greatest possible care. However, discrepancies cannot be excluded.
SMA Solar Technology AG accepts no responsibility or liability for injury to persons, or material
damage caused by mistakes in this manual.
8 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Safety Instructions
3.4 Checking and Storage
Upon receipt of the equipment, check the packaging and the device for any possible damage and
compare the contents of the delivery with the delivery documentation. In the case of damage to the
device and/or unclear delivery contents, please contact SMA Solar Technology AG immediately
(contact address is in the appendix).
The equipment may only be stored when closed, thus ensuring its interior is protected from
dust and moisture.
During longer storage periods, the equipment must be kept in a dry place to prevent
moisture from entering the inverter.
3.5 Transport
Only the transport methods described in the installation guide are permissible. Please note the heavy
weight of the equipment and the non-central center of gravity. The center of gravity is marked on the
packaging.
WARNING!
Danger of tipping during transport.
Follow the "Sunny Central Transport Instructions" in Appendix A and pay attention to the
center of gravity markings on the packaging.
3.6 Installation
The information contained in the installation guide must be observed when installing the inverter. The
SC 100 Indoor is designed for indoor installation, with a protection rating of IP21. The SC 100
Outdoor is designed for outdoor installation, with a protection rating of IP44/54. The device must be
installed in a manner such that the proper electrical connections, adequate ventilation, and adequate
fire protection are possible.
The Sunny Central SC100 Outdoor product line has been type-tested and approved for outdoor
installation in accordance with the industry-standard EMC limits (EMC = Electro Magnetic
Compatibility).
Please observe the additional information on installing the SC 100 Outdoor located in
Appendix C.
Installation Guide SC-100-IEN093231 9
Safety Instructions SMA Solar Technology AG
3.7 Special Hazards of Photovoltaic Systems
DANGER!
An active power source is connected!
Photovoltaic systems have special characteristics representing special hazards:
• An active power source is connected. This means that, dependin g on the oper ating mode, ther e
may be voltage present, either from the photovoltaic generator and/or the Sunny Central. This
is especially important to note when disconnecting particular parts of the system
• Very high DC voltages are present (no zero-crossing) which, in case of a fault or inappropriate
use of fuses or plugs, may lead to arcing.
• The short-circuit current of the photovoltaic generator is only slightly more than the maximum
operating current and is also dependent on the level of solar irradiation. This means that, if a
short circuit occurs in the system, the existing circuit breakers are not guaranteed to switch off.
• A highly branched generator array may be difficult to disconnect if a fault develops (e.g. short
circuit). We recommend the extra use of external DC circuit breakers for disconnecting the
inverter and/or the DC main cables / Sunny String monitors (DC circuit breakers optionally
available). One circuit breaker should be allocated to each input, and these should be located
near to the Sunny Central, as described in the standard VDE 0100 part 7-712 and the
VDI 6012 regulations.
3.8 Electrical Connection
Th e el ect rical co nne cti on m ust be perfo rme d accord ing to t he in stallation guide, the device connection
plan and the technical data of the device.
AC Grid Connection
The customer must determine the required grid connection type for the AC grid connection
(TN-C, TN-S, TT grid) and coordinate it with SMA.
En sur e th e grid co nne cti on c abl e fo r grid fe edi ng i s fu sed at t he n omi nal cur ren t in dic ated on t he n ame
plate. If the specified nominal current differs from the nominal current of the fuse plug, the fuse plug
having the next highest nominal current may be used. A power switch is used for the optional loaddisconnecting switch.
An external input control voltage (optional) must be fused with a circuit breaker conforming to the
specifications in Appendix B (SC100 Indoor / Outdoor technical data).
NOTICE!
SMA must be informed of the required AC grid connection type!
10 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Safety Instructions
Lightning / Overvoltage Protection
The device has internal overvoltage protection on the DC side and, depending on the option chosen,
also has lightning and/or overvoltage protection on the AC side. The desired level of protection can
only be achieved when the grid connection point has a Lightning Protection Zones Concept in
compliance with DIN VDE 0185-3 (DIN EN 62305 / VDE 085, part 305-3). In keeping with the
Lightning Protection Zones Concept, there are lightning conductors and combined overvoltage
protectors which are not included in the scope of delivery for the equipment and which must be
installed at the entrance (transfer point from lightning protection zone LPZ 0 to LPZ 1).
We recommend using lightning protection for the PV generator.
A direct strike can irreparably damage the overvoltage protectors or other system
components and cause additional consequential damages.
We recommend expanding the lightning and overvoltage protection for external input
control voltage. Please see section 7.1.9 Lightning and Overvoltage Protection.
Emergency Shut-off
The inverter is not equipped with an external emergency shut-off switch.
An external emergency shut-off switch or the external emergency shut-off function for more than one
device can be ordered as an option (emergency shut-off circuit).
WARNING!
The emergency shut-off circuit may only be supplied with power from a single Sunny
Central.
3.9 Operation
Apart from the Sunny Central Control, there are no control elements on the device. The cabinet doors
must only be opened for commissioning, maintenance and troubleshooting, as well as for data query
and parameter setting. Before opening, the device must be switched off using the key switch. Please
also note the following safety instructions for working on the device.
DANGER!
Before opening the door, the Sunny Central must be switched off using the key switch!
The Sunny Central must not be operated with the door open!
Installation Guide SC-100-IEN093231 11
Safety Instructions SMA Solar Technology AG
3.10 Commissioning, Maintenance and Repair
All work on the Sunny Central may only be performed when the device is safely disconnected from
the PV voltage, the grid voltage, and the internal power supply, when these power sources are
secured against being switched on again, and when it has been checked that the device is voltagefree. Only qualified technical personnel, who are familiar with the operation of the system, may
undertake any such work.
3.11 Power Supplies
Switching on of the external power supplies
• Grid voltage for the grid feed-in
• Grid voltage for control voltage (internal power supply). There is the option of feeding it
externally.
• D C vo lta ge from t he p hotovol tai c ge nerator mus t occur i n th e sequence described and may only
be performed when the following conditions are satisfied:
• All connections have been made according to the installation guide and the wiring diagram.
• The protective ground connection for grid feed-in and for internal power supply has been made.
• The device is switched off. This means that the Start/Stop switch is in the “Stop” position and
the main switches are off.
• The Plexiglas covers are mounted, to ensure protection against accidental touching.
• The nominal voltage, frequency and the right-hand rotary field are maintained (see device
technical data).
• The polarity of the DC voltage at the inputs / fuse inputs (device dependent) has been checked.
• The photovoltaic generator has been checked with an insulation test to ensure that there is no
ground fault.
12 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Safety Instructions
Figure 3.1: Sunny Central SC100 interior view
DANGER!
The protective ground connection mu st b e ma de b efo re t he e xte rnal vol tage is swi tched on!
Installation Guide SC-100-IEN093231 13
Safety Instructions SMA Solar Technology AG
NOTICE!
The nominal voltage, frequency and right-hand rotary field are maintained at the AC grid
connection.
DANGER!
The cabinet must remain closed when connecting the supplies!
3.12 Disconnect
External insulation of the device must always occur under load-free conditions. The device must be
switched off in order to do this. This means that the key switch must be in the “Stop” position.
Work on the Sunny Central may be performed only after switching off the power to the
unit. The VDE regulations must be followed.
•Disconnect
• Protect against reenergizing
• Test each unit to ensure that all voltages have been removed
• Ground and short the unit if necessary (not on the DC side)
If necessary, cover or protect against accidental contact with any voltage carrying
components
The following power supplies must be isolated:
• Grid voltage for the grid feed-in
• Grid voltage for internal power supply (optional)
• DC voltage from the photovoltaic generator
Simply switching off the main AC and DC switches is not sufficient to ensure proper insulation of the
device. The main switches only separate the power circuit from the grid and the photovoltaic
generator.
DANGER!
Dangerous accidental-contact voltages can be present in the device even when the main
AC and DC switches are switched off!
DANGER!
In case of a failure, the DC contactor(s) may carry a life-threatening DC voltage!
14 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Safety Instructions
We recommend the extra use of external DC circuit breakers (optionally available) for
disconnecting the Sunny Centrals and/or one or more DC main cables / Sunny String
monitors. Even in the case of faults or fire, this allows system components to be safely
isolated.
Th e de vic e con tai ns c apa cit ors on th e AC and DC si des tha t mu st dis cha rge o nce the dev ice has been
switched off. After switching off, there are dangerous accidental-contact voltages present within the
device for several minutes. If there is a fault in the device, these voltages may also remain present for
a longer period of time. For these reasons, wait a minimum of 5 minutes after switching off before
opening the device.
WARNING!
The discharge time of the capacitors is longer than 5 minutes.
3.13 General Information
Working on the Fans
The device is equipped with several fans for cooling. Work on the fans may only be performed after
al l in sul ati on m eas ures hav e be en t ake n, i n ex act ly the sa me m anner as prescribed for commissioning,
maintenance and repair work.
WARNING!
Warning: rotating fans in the inverter!
Hearing Protection
The device fans and the power unit create significant levels of operating noise. In addition to this, a
fault in the device can lead to very high sound levels. For these reasons we recommend the use of
hearing protection in its vicinity.
We recommend the use of ear protection when in the vicinity of the device for extended
periods.
Burns
Immediately after isolating the device, depending on the operating conditions, certain components
can be very hot (e.g. fuses, transformer core, sine wave filter, heatsinks etc.).
Safety gloves should always be worn when working near components that can be expected to be
very hot.
We recommend that safety gloves be worn during all work on the device.
Installation Guide SC-100-IEN093231 15
Transport SMA Solar Technology AG
4 Transport
Only the transport methods described in the installation guide are permissible, please follow the
transport requirements in Appendix A.
When delivered, the inverter stands on a pallet. Under standard delivery conditions, a forklift must be
available. When unloading, the heavy-load markings must be observed, without exception.
4.1 Overview of Weights and Dimensions
Please note the heavy weight of the inverter. To assist with transporting, the data sheet on the
dimensions and weight is contained in Appendix B.
The center of gravity of the cabinet unit is marked on the outside of the packaging.
WARNING!
Heavy weight of the cabinet unit! Danger of tipping during transport!
The cabinet must always be transported upright.
Be sure to follow the “Instructions for Transporting Sunny Central Inverters” in
Appendix A!
4.2 Transport Possibilities
Transporting Using a Pallet Truck / Crane
The plinth panels must be unscrewed to transport the cabinet without a palette. This allows the fork of
a pallet truck / forklift or crane to be inserted under the cabinet.
Please note the Sunny Central transport requirements in Appendix A.
16 SC-100-IEN093231 Installation Guide
SMA Solar Technology AG Installation Requirements
5 Installation Requirements
For safe operation of the inverter, the installation site must satisfy the following conditions:
• Foundation (load carrying capacity)
• Inverter protection rating / EMC / sound levels
• Minimum workspace requirements (escape routes)
• Ventilation / permissible ambient temperature / air quality / humidity
5.1 Installation Site Requirements
5.1.1 Foundation
The foundation must guarantee solid and safe positioning of the inverter. It must provide the loadcarrying capacity necessary to cope with the weight of the inverter. A foundation slab is required for
ground-mounted installations. Pouring and dimensioning the foundation slab must be performed by
the customer, see Appendix D.
ventilation system (option customer)
Sunny Central
SMA
A 1
100
E
F
SMA
C
G
Cable section (option customer)
B
H
F
C
D
Cable section (option customer)
Figure 5.1: Installation of the SC100 Indoor in a building
Installation Guide SC-100-IEN093231 17
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