SMA WB 3000-21 Installation
EN
Wind Power Inverters
WINDY BOY 3000TL / 3600TL / 4000TL / 5000TL
Installation Manual
WB3-5TL-21-IA-en-10 | IMEN-WB3-5TL-21 | Version 1.0
SMA Solar Technology AG Table of Contents
Table of Contents
1 Information about this document . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Windy Boy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4 Bluetooth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5 Slot for Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.7 Slot for Multi-Function Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8 Grid Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9 Varistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.10 SMA Grid Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Selecting the Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Mounting the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1 Safety during Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2 Overview of the Connection Area. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2.1 View from Below . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2.2 Interior View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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Table of Contents SMA Solar Technology AG
6.3 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.1 Conditions for the AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.2 Connecting the Inverter to the Power Distribution Grid . . . . . . . . . . 31
6.3.3 Additional Grounding of the Enclosure . . . . . . . . . . . . . . . . . . . . . . 34
6.4 DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.4.1 Connecting the Connection Cables to DC Connectors . . . . . . . . . . 35
6.4.2 Bridging the DC Inputs on the Inverter. . . . . . . . . . . . . . . . . . . . . . . 37
6.4.3 Connecting the Rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7 Initial Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2 Configuring the Country Data Set . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.3 Setting the NetID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.4 Commissioning the Inverter for the First Time. . . . . . . . . . . . . . . . . . . 46
7.5 For Italy Only: Starting the Self-Test. . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.5.1 Abortion of the Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.5.2 Restarting the Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 Changing the Display Language. . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.2 Changing the Plant Password and Plant Time . . . . . . . . . . . . . . . . . . 50
8.3 Adapting the Polynomial Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.4 Setting the Deactivation Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
8.5 Changing the DC Critical Voltage for Feed-in to the
Power Distribution Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.6 Connecting the Inverter to Sunny Portal. . . . . . . . . . . . . . . . . . . . . . . 53
8.7 Setting the Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9 Disconnecting the Inverter from Voltage Sources . . . . . . . . . . 54
10 Recommissioning the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . 57
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SMA Solar Technology AG Table of Contents
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.1 LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.2 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.2.1 Event Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.2.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.3 Cleaning the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
11.4 Checking the Small Wind Turbine System for Ground Faults . . . . . . 71
11.5 Checking the Function of the Varistors. . . . . . . . . . . . . . . . . . . . . . . . 72
11.6 Replacing the Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.1 Disassembling the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.2 Packing the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
12.3 Disposing of the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.1 DC/AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.1.1 Windy Boy 3000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.1.2 Windy Boy 3600TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
13.1.3 Windy Boy 4000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
13.1.4 Windy Boy 5000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
13.2 General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
13.3 Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
13.4 Climatic Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
13.5 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.6 Torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.7 Grounding Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.8 Data Storage Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.9 Multi-Function relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
15 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Installation Manual WB3-5TL-21-IA-en-10 5
Table of Contents SMA Solar Technology AG
6 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 1 Information about this document
1 Information about this document
Validity
This document is valid for the following device types as of firmware version 2.10:
• WB 3000TL-21
• WB 3600TL-21
• WB 4000TL-21
• WB 5000TL-21
Target Group
This document is intended for qualified persons. Only qualified personnel with the appropriate skills
are allowed to perform the tasks described in this document (see Section2.2 "Skills of Qualified
Persons", page11).
Additional Information
Links to additional information can be found at www.SMA-Solar.com:
Document title Document type
Miniature Circuit-Breaker Technical information
Measured Values and Parameters Technical description
®
SMA Bluetooth ‒ SMA Bluetooth
in Practice
®
SMA Bluetooth
Wireless Technology Technical description
Wireless Technology
Technical information
Installation Manual WB3-5TL-21-IA-en-10 7
1 Information about this document SMA Solar Technology AG
Symbols
Symbol Explanation
Indicates a hazardous situation which, if not avoided, will result in death
or serious injury
Indicates a hazardous situation which, if not avoided, can result in death
or serious injury
Indicates a hazardous situation which, if not avoided, can result in minor
or moderate injury
Indicates a situation which, if not avoided, could result in property damage
Information that is important for a specific topic or goal, but is not
safety-relevant
☐ Indicates an essential requirement for achieving a specific goal
☑ Desired result
✖ A problem that could occur
Typographies
Typography Use Example
bold •Display messages
• Parameters
• Connections
•Elements on an interface
text
• Elements to be selected
• Elements to be entered
[Button] • Button on a user interface • Select
• Select the Set country
standard parameter and
adjust the required
country data set.
[Device selection].
8 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 1 Information about this document
Nomenclature
Complete designation Designation in this document
Torque Torque
Electronic Solar Switch ESS
Small wind turbine system Small wind turbine system, plant
®
SMA Bluetooth
Wireless Technology Bluetooth
Windy Boy Inverter, product
Abbreviations
Abbreviations Designation Explanation
AC Alternating Current ‒
DC Direct Current ‒
EC European Community ‒
EMC Electromagnetic Compatibility ‒
LED Light-Emitting Diode ‒
MSL Mean Sea Level ‒
NetID Network Identification Identification number for
SMA Bluetooth network
PC Personal Computer ‒
PE Protective Earth Protective conductor
SWTS Small Wind Turbine System ‒
VDE Verband der Elektrotechnik Elektronik
Informationstechnik e.V.
Association for Electrical, Electronic
and Information Technologies
Installation Manual WB3-5TL-21-IA-en-10 9
2 Safety SMA Solar Technology AG
Windy Boy Protection Box
Windy Boy
power
distribution grid
Small Wind
Turbine System
Load resistor
2 Safety
2.1 Intended Use
The Windy Boy is a transformerless wind power inverter that converts the rectified alternating current
of a small wind turbine system or other energy converters based on permanent magnet electric
generators into alternating current suitable for the grid and feeds this energy into the power
distribution grid or stand-alone grid.
Figure1: Principle of a small wind turbine system with Windy Boy
The Windy Boy is suitable for indoor and outdoor use.
The Windy Boy may only be used with small wind turbine systems or with energy converters based
on permanent magnet electric generators (e.g. water energy plants, CHP plants, diesel generators).
The small wind turbine system or energy converter must be suitable for use with the Windy Boy and
ap pro ved by t he s mal l wi nd t urb ine sys tem or e ner gy c onv ert er m anuf act ure r. S MA S ola r Te chn olo gy
recommends operating Windy Boy together with a small wind turbine system without neutral
grounding.
The Windy Boy must not be connected to a direct current supply grid.
An overvoltage protection must be installed between the Windy Boy and the rectifier to limit the direct
vo lta ge. Use onl y an ove rvo lta ge p rot ect ion tha t is design ed f or the maximum power of the small wind
turbine system. SMA Solar Technology recommends using the Windy Boy Protection Box of type
50 0-1 1. I f you ar e no t using the Windy B oy P rot ect ion Box of t ype 500-11, you must install a capacity
of at least 120 μF between the Windy Boy and the rectifier. A low DC voltage ripple has a positive
effect on the electrical endurance of the inverter.
All components must remain within their permitted operating ranges at all times.
Alternative uses of the Windy Boy not expressly recommended by SMA Solar Technology AG are
not permitted.
The Windy Boy must not be connected in parallel with other inverters on the DC side.
10 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 2 Safety
For safety reasons, it is not permitted to modify the product or install components that are not explicitly
recommended or distributed by SMA Solar Technology AG for this product.
Before carrying out work on the inverter and before the ESS can be removed, the small wind turbine
system must always be stopped and secured against restart. Disconnecting the inverter and removing
the ESS while the small wind turbine system is running can cause damage to the small wind turbine
system and the inverter due to the resulting rapid discharge.
• Do not mount the Windy Boy on flammable construction materials.
• Do not mount the Windy Boy near areas containing highly flammable materials.
• Do not mount the Windy Boy in potentially explosive areas.
The enclosed documentation is an integral part of this product.
• Read and observe the documentation.
• Keep the documentation in a convenient place for future reference.
2.2 Skills of Qualified Persons
The tasks described in this document must be performed by qualified persons only. Qualified persons
must have the following skills:
• Knowledge of how an inverter works and is operated
• Training in how to deal with the dangers and risks associated with installing and using electrical
devices and plants
• Training in the installation and commissioning of electrical devices and plants
• Knowledge of all applicable standards and directives
• Knowledge of and adherence to this document and all safety precautions
2.3 Safety Precautions
Electric Shock
High voltages that can cause fatal electric shocks when touched are present in the live components
of the inverter.
• Prior to pe rforming any work on the inver ter, d isconnec t it from any voltage sou rce as described
in this document (see Section 9).
Burn Hazards
Some parts of the enclosure can become hot during operation.
• Do not touch any parts other than the lower enclosure lid of the inverter during operation.
Electrostatic Discharge
By touching electronic components, you can damage or even destroy the inverter through electrostatic
discharge (ESD).
• Ground yourself before touching any components.
Installation Manual WB3-5TL-21-IA-en-10 11
3 Scope of Delivery SMA Solar Technology AG
3 Scope of Delivery
Check the scope of delivery for completeness and any externally visible damage. Contact your
specialty retailer if the scope of delivery is incomplete or damaged.
Figure2: Components included in the scope of delivery
Position Quantity Description
A1Inverter
B 1 Wall mounting bracket
C4Positive DC connector
D4Negative DC connector
E8Sealing plug
F 1 Installation manual, user manual, document set with explanations
and certificates, supplementary sheet with the default settings
12 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 4 Product Description
A
B
C
D
E
F
G
4 Product Description
4.1 Windy Boy
The Windy Boy is a transformerless wind power inverter that converts the alternating current of a small
wind turbine system into alternating current suitable for the grid and feeds this energy into the power
distribution grid or stand-alone grid.
Figure3: Design of the Windy Boy
Position Description
A Cooling fins
B Type label
CLEDs
DDisplay
E Electronic Solar Switch (ESS)
FLower enclosure lid
G Upper enclosure lid
Installation Manual WB3-5TL-21-IA-en-10 13
4 Product Description SMA Solar Technology AG
Symbols on the inverter
Symbol Description Explanation
Inverter This symbol defines the function of the
green LED. The green LED indicates the
operating state of the inverter.
Observe documentation This symbol defines the function of the
red LED. The red LED indicates an error.
Read this document to remedy the error.
Bluetooth This symbol defines the function of the
bl ue L ED. The blu e LE D in dic ate s th at the
Bluetooth communication is enabled.
QR Code
®
Danger If a second protective conductor is
The QR Code® refers to the SMA bonus
program (for information on this, see
www.SMA-Bonus.com).
required, also ground the enclosure (see
Section 6.3.3).
Danger to life due to high
voltages in the inverter; observe
waiting time.
High voltages that can cause fatal
electric shocks are present in the live
components of the inverter. Disconnect
the inverter from any voltage sources
before performing any work on it
(see Section 9).
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SMA Solar Technology AG 4 Product Description
4.2 Type Label
The type label provides a unique identification of the inverter. The type label is on the right-hand side
of the enclosure.
Figure4: Layout of the type label
Position Description Explanation
A Model Inverter device type
BDate of manufacture Inverter manufacture date
(year-month-day)
C Additional information Field for additional information, e.g.
standard information
D Device-specific characteristics ‒
E Serial No. Inverter serial number
You will require the information on the type label to use the inverter safely and when seeking customer
support from the SMA Service Line. The type label must be permanently affixed to the inverter.
Installation Manual WB3-5TL-21-IA-en-10 15
4 Product Description SMA Solar Technology AG
Symbols on the type label
Symbol Description Explanation
Danger to life due to high
voltages.
The product operates at high voltages.
All work on the inverter must be carried out by
qualified persons only.
Risk of burns from hot
surfaces
The product can become hot during operation.
Avoid contact during operation. Allow the
product to cool down sufficiently before
carrying out any work. Wear personal
protective equipment such as safety gloves.
Observe documentation Observe all documentation that is supplied
with the product.
DC Direct current
Without transformer The product does not have a transformer.
AC Alternating current
WEEE designation Do not dispose of the product together with the
household waste but in accordance with the
locally applicable disposal regulations for
electronic waste.
CE marking The product complies with the requirements of
the applicable EC directives.
Device class ID The product is equipped with a wireless
component and complies with device class 2.
Degree of protection The product is protected against dust intrusion
and water jets from any angle.
Outdoor The product is suitable for outdoor installation.
RAL quality mark for solar
products
The product complies with the requirements of
the German Institute for Quality Assurance
and Certification.
16 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 4 Product Description
Symbol Description Explanation
Certified safety The product is VDE-tested and complies with
the requirements of the German Equipment
and Product Safety Act.
C-Tick The product complies with the requirements of
the applicable Australian EMC standards.
4.3 Display
The display shows the current operating data of the inverter (e.g. current power, daily energy, total
energy) as well as events or errors. The power and energy are displayed as bars in the diagram.
There is a slot for an SD card on the left edge of the display enclosure. You can use the SD card to
carry out an inverter firmware update, for example (for information on firmware updates with an
SD card see the technical description "Firmware Update with SD Card" at www.SMA-Solar.com).
Figure5: Display layout (example)
Position Description Explanation
A Power Current power
B Day Daily energy
C Total Displays the total amount of energy fed in up until now
D Active functions The different symbols indicate which functions for
communication, grid management or temperature
derating are enabled or active.
Installation Manual WB3-5TL-21-IA-en-10 17
4 Product Description SMA Solar Technology AG
Position Description Explanation
E Line conductor Indicates which line conductor the displayed values are
assigned to.
F Event number relating to the
power distribution grid
G Output voltage/
output current
H Event number relating to the
Event number of errors relating to the power distribution
grid
Displays output voltage and output current of a line
conductor in alternation
Event number of errors relating to the inverter
inverter
IInput voltage/
input current
K Event number relating to the
small wind turbine system
Displays input voltage and input current of one input in
alternation
Event number of errors relating to the small wind turbine
system
L Text line Displays the event message or error message
M Power and yield curve Changes in power over the last 16 feed-in hours or the
energy yields over the last 16 days
• In order to switch between the displays, tap once
on the enclosure lid
Symbols on the display
Symbol Description Explanation
Tapping You can operate the display by tapping on the
enclosure lid:
• Tapping once: to activate the backlight,
to scroll to the next text line, to switch
between the power graphs of the last
16 feed-in hours and the energy yields of
the last 16 days.
• Tapping twice: the display shows, in
succession, the firmware version, the
serial number or designation of the
inverter, NetID, the configured country
data set and display language.
Telephone receiver Indicates that an error cannot be rectified on
site
• Contact the SMA Service Line.
18 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 4 Product Description
Symbol Description Explanation
Wrench Indicates that an error can be rectified on site
Bluetooth Indicates that an active Bluetooth conne cti on is
established
Bluetooth connection
quality
Indicates the quality of the Bluetooth
connection to other Bluetooth devices
Speedwire If a Speedwire data module is installed in the
inverter, this symbol indicates that there is a
connection to a network.
Webconnect function If a Webconnect data module is installed in the
inverter, this symbol indicates that it is possible
to connect to the Sunny Portal.
Multi-function relay Indicates that the multi-function relay is active
Thermometer Indicates that the power of the inverter is
limited due to excessive temperature
Power limitation Indicates that the external active power
limitation via the plant control is active
Small wind turbine system
‒
with rectifier
Inverter ‒
Grid relay A closed grid r elay i ndicates that t he inv erter is
feeding into the power distribution grid.
An open grid relay shows that the inverter is
disconnected from the power distribution grid.
Power distribution grid ‒
Installation Manual WB3-5TL-21-IA-en-10 19
4 Product Description SMA Solar Technology AG
4.4 Bluetooth
The inverter is equipped as standard with a Bluetooth interface and can communicate with special
SMA communication products or other inverters (for information on supported products, see
www.SMA-Solar.com).
If you would like to communicate via Bluetooth, you can protect the inverter with one plant password
for the user and one plant password for the installer.
All inverters are delivered with a standard plant password for the user (0000) and a standard plant
password for the installer (1111). To protect the plant from unauthorized access, you must change
the plant passwords using Sunny Explorer (for information on changing the plant password, refer to
the Sunny Explorer help).
If you do not wish to communicate via Bluetooth, deactivate the Bluetooth communication
(see Section7.3 "Setting the NetID", page45).
4.5 Slot for Communication Interface
The inverter can optionally be fitted with an extra communication interface (e.g. RS485).
This communication interface enables the inverter to communicate with special SMA communication
products (for information on supported products, see www.SMA-Solar.com). The communication
interface can be retrofitted or installed by default with the respective order.
Depending on the type of communication, RS485, Bluetooth, or Speedwire, the parameters and
messages are displayed differently on the communication products.
Example: How the country data set parameter is displayed
• For communication with RS485: CntrySet parameter
• For communication with Bluetooth or Speedwire: Set country standard parameter
4.6 Operating Parameters
Various operating parameters control the functionality of the inverter. You can only adjust all
operating parameters of the inverter, excluding the country data set, using an SMA communication
product (see Section 8.7). You can adjust the country data set before commissioning or within the first
ten feed-in hours via two rotary switches in the inverter (see Section 7.2).
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SMA Solar Technology AG 4 Product Description
4.7 Slot for Multi-Function Interface
The inverter has a slot for a multi-function interface. This slot is designed to connect a simple
multi-function relay, an SMA Power Control Module, or a fan retrofit kit. The multi-function interface
can be retrofitted or installed by default with the respective order.
Multi-Function Relay
You can configure the multi-function relay for various operating modes. The multi-function relay is
used, for example, to switch error indicators on or off (for information on installation and
configuration, see installation manual of the multi-function relay).
SMA Power Control Module
The SMA Power Control Module enables the inverter to implement grid management and is equipped
with an additional multi-function relay (for information on installation and configuration, see the
SMA Power Control Module installation manual).
Fan Retrofit Kit
The fan retrofit kit is used for additional inverter cooling at high ambient temperatures and also has a
multi-function relay (for information on installation and configuration, see the fan retrofit kit installation
manual). The fan retrofit kit and the SMA Power Control Module cannot be operated in parallel.
4.8 Grid Management
The inverter is equipped with grid management functions.
Depending on the requirements of the grid operator, you can activate and configure the functions
(e.g. provision of reactive power, active power limitation) via operating parameters (for information
on the functions and operating parameters, see the Technical Description "Measured Values and
Parameters" at www.SMA-Solar.com).
4.9 Varistors
Varistors are voltage-dependent resistors that protect the inverters against overvoltage. The inverter is
equipped with thermally monitored varistors.
Varistors can become worn and lose their protective function with age or repeated strain as a result
of overvoltage. The inverter detects if one of the varistors is defective and displays an error message.
The varistors are specially manufactured for use in the inverter and are not commercially available.
You must order new varistors directly from SMA Solar Technology AG.
Installation Manual WB3-5TL-21-IA-en-10 21
4 Product Description SMA Solar Technology AG
4.10 SMA Grid Guard
SMA Grid Guard acts as an automatic disconnection device between a grid-parallel generator
(e.g. a PV plant or small wind turbine system) and the power distribution grid.
Furthermore, SMA Grid Guard is a grid monitoring concept which detects errors by permanently
monitoring grid impedance, line voltage and power frequency. For example, SMA Grid Guard
detects when a stand-alone grid is formed and immediately disconnects the inverter from the power
distribution grid.
In some countries, the connection conditions require a device which protects grid-relevant operating
parameters against unpermitted changes. SMA Grid Guard assumes this function and protects the
setting of the country data set after the first 10 feed-in hours. After the first 10 feed-in hours the country
data set can only be changed using a communication product and after a personal access code has
been entered, the SMA Grid Guard code. You can obtain the SMA Grid Guard code from
SMA Solar Technology AG (for application for the SMA Grid Guard code, see certificate
"Application for SMA Grid Guard-Code" at www.SMA-Solar.com).
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SMA Solar Technology AG 5 Mounting
5 Mounting
5.1 Selecting the Mounting Location
Requirements for the mounting location:
Danger to life due to fire or explosion
Despite careful construction, electrical devices can cause fires.
• Do not mount the inverter on flammable construction materials.
• Do not mount the inverter in areas where highly flammable materials are stored.
• Do not mount the inverter in a potentially explosive atmosphere.
☐ The mounting location must be inaccessible to children.
☐ A solid foundation must be available for mounting, e.g. concrete or masonry. When mounted
on plasterboard or similar materials in a living area, the inverter will develop audible vibrations
during operation, which could be considered disturbing.
☐ The mounting location must be suitable for the weight and dimensions of the inverter
(see Section13 "Technical Data", page77).
☐ The mounting location must be easily and safely accessible at all times without the use of
additional aids being necessary, e.g., scaffolding or lifting platforms. Non-fulfillment of these
criteria may restrict servicing.
☐ The mounting location must not be exposed to direct solar irradiation. Direct solar irradiation
can overheat the inverter. As a result, the inverter reduces its power output.
☐ Climatic conditions must be met (see Section13 "Technical Data", page77).
☐ The ambient temperature must be below 40°C to ensure the optimal operation of the inverter.
Installation Manual WB3-5TL-21-IA-en-10 23
5 Mounting SMA Solar Technology AG
Dimensions for wall mounting:
Figure6: Wall mounting bracket dimensioning
24 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 5 Mounting
Observe recommended clearances:
Figure7: Recommended clearances
• Observe minimum clearances to the walls as well as to other inverters or objects.
This ensures adequate heat dissipation and sufficient space to remove the ESS.
• If multiple inverters are mounted in areas with high ambient temperatures, increase the
clearances between the inverters and ensure sufficient fresh-air supply.
☑ This prevents a reduction in inverter power as a result of high temperatures (for details
on temperature derating, see the Technical Information "Temperature Derating"
at www.SMA-Solar.com).
Observe permitted mounting position:
Figure8: Permitted and prohibited mounting positions
Installation Manual WB3-5TL-21-IA-en-10 25
5 Mounting SMA Solar Technology AG
• Mount t he inv erter in a pe rmitt ed mou nting posit ion. T he dis play should be mounted at eye level.
☑ Mounting the inverter in a permissible position will ensure that no moisture can penetr ate the
inverter.
☑ By mounting the device at eye level, display messages and LED signals can be read without
difficulty.
5.2 Mounting the Inverter
Anti-theft device:
You can protect the inverter from theft with a padlock. The padlock locks the inverter to the wall
mounting bracket.
The device must meet the following requirements:
☐ The material must be resistant to corrosion.
☐ The lock shackle must be hardened.
☐The lock cylinder must be secured.
☐ If it is mounted outdoors, the padlock must be weather-proof.
☐ The function must be guaranteed for the electrical endurance of the inverter.
Figure9: Dimensions of the padlock for the anti-theft device
Additionally required mounting material (not included in the scope of delivery):
☐ 3 screws (minimum diameter 6 mm) that are suitable for the foundation
☐ 3 washers (minimum external diameter 18 mm) that are suitable for the screws
☐ 3 screw anchors that are suitable for the foundation
☐ If the inverter is to be protected against theft, 1 padlock
1. Ensure that there are no lines laid in the wall which could be damaged when drilling.
26 WB3-5TL-21-IA-en-10 Installation Manual
SMA Solar Technology AG 5 Mounting
2. Mark the position of the drill holes using the wall mounting bracket. Use at least two holes on
the left-hand and right-hand side and the lower hole in the wall mounting bracket.
Tip: When mounting on a post, use the upper and lower central holes.
3. Drill the holes and insert the screw anchors.
4. Secure the wall mounting bracket horizontally to
the wall using screws and washers.
5.
Risk of injury when hanging the inverter in the wall mounting bracket
• Keep in mind the weight of the inverter (see Section13 "Technical Data", page77).
• Hang the inverter in the wall mounting
bracket. Use the recessed grips at the side
and transport the inverter in a horizontal
position.
6. Ensure that the inverter is securely seated.
7. To protect the inverter from theft, attach a padlock:
• Place the shackle of the padlock through the
metal lug on the wall mounting bracket and
through the lug on the rear of the inverter.
As you do so, move the shackle outward from
the center of the inverter.
• Close the shackle.
Installation Manual WB3-5TL-21-IA-en-10 27
6 Electrical Connection SMA Solar Technology AG
A B
C
D
6 Electrical Connection
6.1 Safety during Electrical Connection
Electric Shock
High voltages that can cause fatal electric shocks when touched are present in the live components
of the inverter.
• Prior to pe rforming any work on the inver ter, d isconnec t it from any voltage sou rce as described
in this document (see Section 9).
Electrostatic Discharge
Touching electronic components can cause damage to or destroy the inverter through electrostatic
discharge.
• Ground yourself before touching any components.
6.2 Overview of the Connection Area
6.2.1 View from Below
Figure10: Enclosure openings at the bottom of the inverter
Position Description
A Cable gland M20x1.5 for connection to the multi-function interface or connection
of the fan retrofit kit
B Enclosure opening with filler-plug for connection to the communication interface
C Enclosure opening with filler-plug for connection to the communication interface
D Cable gland M32x1.5 for connection to the power distribution grid
28 WB3-5TL-21-IA-en-10 Installation Manual
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