SMA STP 15000TL Installation
EN
PV Inverter
SUNNY TRIPOWER 15000TL Economic Excellence
SUNNY TRIPOWER 15000TL High Efficiency
SUNNY TRIPOWER 20000TL Economic Excellence
SUNNY TRIPOWER 20000TL High Efficiency
Installation Manual
STP20TLHE-IA-IEN122222 | IMEN-STP20TLHE | Version 2.2
SMA Solar Technology AG Table of Contents
Table of Contents
1 Information on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.1 Symbols on the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.2 Symbols on the Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Identifying the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Sunny Tripower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 DC switch-disconnector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Multi-Function Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6 Feed-In Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7 Reverse Current Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 21
5.3 Mounting the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Installation Manual STP20TLHE-IA-IEN122222 3
Table of Contents SMA Solar Technology AG
6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Overview of the Connection Area . . . . . . . . . . . . . . . . . . . . . . 27
6.3 Connection to the Electricity Grid (AC). . . . . . . . . . . . . . . . . . . 29
6.3.1 Conditions for the AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.2 AC Connection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.3.3 Connecting the Second Protective Conductor. . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 Connecting the PV Array (DC) . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.4.1 Conditions for DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.4.2 Assembling the DC Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.4.3 Opening the DC Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.4.4 Connecting the PV Array (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.5 Setting the Country Data Set and Display Language . . . . . . . . 42
6.5.1 Checking the Country Data Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.5.2 Extension of the Deactivation Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.5.3 Setting the country data set and language using rotary switches . . . . . . . . . 49
6.6 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.6.1 Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.6.2 Multi-Function Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.6.3 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.7 Activating and Deactivating the Reverse Current Protection
at Input Area A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1 Commissioning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2 Display Messages during the Start Phase. . . . . . . . . . . . . . . . . 57
8 Disconnecting the Inverter from Voltage Sources . . . . . . 58
9 Maintenance and Cleaning. . . . . . . . . . . . . . . . . . . . . . . . 61
9.1 Cleaning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.2 Checking Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Table of Contents
9.2.1 Cleaning the Ventilation Grids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.2.2 Cleaning the Fan on the Bottom of the Inverter. . . . . . . . . . . . . . . . . . . . . . . 62
9.2.3 Cleaning the Fan on the Left-hand Side of the Inverter Enclosure . . . . . . . . . 64
9.2.4 Checking the Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
10 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.1 LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.2 Event Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
10.3 Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
11.1 Checking the PV Array for Earth Faults . . . . . . . . . . . . . . . . . . . 75
11.2 Checking the Function of the Varistors . . . . . . . . . . . . . . . . . . . 77
12 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
12.1 Dismantling the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
12.2 Replacing the Enclosure Lid . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
12.3 Packing the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.4 Storing the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.5 Disposing of the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
13 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
13.1 DC/AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
13.1.1 SUNNY TRIPOWER 15000TL Economic Excellence . . . . . . . . . . . . . . . . . . 85
13.1.2 Sunny Tripower 15000TL High Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . . . 86
13.1.3 Sunny Tripower 20000TL Economic Excellence . . . . . . . . . . . . . . . . . . . . . . 87
13.1.4 Sunny Tripower 20000TL High Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . . . 88
13.2 General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
13.3 Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
13.4 Licences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
13.5 Climatic Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.6 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Installation Manual STP20TLHE-IA-IEN122222 5
Table of Contents SMA Solar Technology AG
13.7 Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.8 Distribution systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.9 Data Storage Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
6 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Information on this Manual
1 Information on this Manual
1.1 Validity
This manual describes the procedure for mounting, installation, commissioning, maintenance and
troubleshooting of the following SMA inverters:
• Sunny Tripower 15000TL Economic Excellence (STP 15000TLEE-10)
• Sunny Tripower 15000TL High Efficiency (STP 15000TLHE-10)
• Sunny Tripower 20000TL Economic Excellence (STP 20000TLEE-10)
• Sunny Tripower 20000TL High Efficiency (STP 20000TLHE-10)
Store this manual where it will be accessible at all times.
1.2 Target Group
This manual is for the use of electrically skilled persons. The tasks described in this manual may be
performed by electrically skilled persons only.
1.3 Additional Information
You will find further information on special topics such as designing a miniature circuit-breaker or the
description of the parameters and measured values at www.SMA.de/en.
Refer to the user manual provided for detailed information on how to operate the inverter.
Installation Manual STP20TLHE-IA-IEN122222 7
Information on this Manual SMA Solar Technology AG
1.4 Symbols Used
The following types of safety precautions and general information appear in this document:
DANGER!
DANGER indicates a hazardous situation which, if not avoided, will 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 which, if not avoided, could result in property damage.
Information
An Information block provides valuable hints for the efficient installation and operation of
your product.
☑ This symbol indicates the result of an action.
8 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Safety
2 Safety
2.1 Intended Use
The Sunny Tripower is a PV inverter which converts the direct current of the PV array to grid-compliant
alternating current and performs three-phase feed-in into the electricity grid.
Principle of a PV plant with this Sunny Tripower
The Sunny Tripower is suitable for indoor and outdoor use.
The Sunny Tripower may only be operated with PV arrays (PV modules and cabling) of protection
class II. Do not connect any energy sources other than PV modules to the Sunny Tripower.
Capacitive Discharge Currents
PV modules with large capacities relative to earth, such as thin-film PV modules with cells
on a metallic substrate, may only be used if their coupling capacity does not exceed
500 nF.
During feed-in operation, a leakage current flows from the cells to earth, the size of which
depends on the manner in which the PV modules are installed (e.g. foil on metal roof) and
on the weather (rain, snow). This "normal" leakage current may not exceed 50 mA due to
the fact that the inverter would otherwise automatically disconnect from the electricity grid
as a protective measure. For further information on this subject see the Technical
Information "Capacitive Discharge Currents" at www.SMA.de/en.
When designing the PV plant, ensure that the values comply with the permitted operating range of all
components at all times. The free design program "Sunny Design" from version 2.0
(www.SMA.de/en/SunnyDesign) will assist you in this. The manufacturer of the PV modules must
have approved the PV modules for use with this Sunny Tripower. You must also ensure that all
measures recommended by the module manufacturer for long-term maintenance of the module
properties are taken (see also Technical Information "Module Technology" at www.SMA.de/en).
Do not use the Sunny Tripower for purposes other than those described here. Alternative uses,
modifications to the Sunny Tripower or the installation of components not expressly recommended or
sold by SMA Solar Technology AG void the warranty claims and operation permission.
Installation Manual STP20TLHE-IA-IEN122222 9
Safety SMA Solar Technology AG
2.2 Safety Precautions
DANGER!
Danger to life due to high voltages in the inverter
High voltages which may cause electric shocks are present in the conductive parts of the
inverter.
• Prior to performing any work on the inverter, disconnect the inverter on the AC and
DC sides (see Section 8 "Disconnecting the Inverter from Voltage Sources"
(page58)).
CAUTION!
Risk of burns due to hot enclosure parts
During operation, the upper enclosure lid and the enclosure body may become hot.
• Only touch the lower enclosure lid during operation.
PV array earthing
Comply with the local regulations for earthing the modules and the PV array.
SMA Solar Technology AG recommends connecting the array frame and other electr ically
conductive surfaces so that there is continuous conduction and earthing them in order to
ensure maximum protection for property and persons.
10 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Safety
2.3 Explanation of Symbols
2.3.1 Symbols on the Inverter
Symbol Explanation
Operation display
Indicates the operating state of the inverter.
A disturbance has occurred.
Read section 11 "Troubleshooting" (page75) to remedy the disturbance.
SMA Bluetooth
Shows the status of Bluetooth communication.
Danger to life due to high voltages in the inverter
There is residual voltage in the inverter. The inverter takes 20 minutes to
discharge.
• Wait 20 minutes before you open the upper enclosure lid or the DC lid.
NOTICE, danger!
• Observe the connection requirements for the second protective
conductor in Section 6.3.1 "Conditions for the AC Connection"
(page29).
QR Code®* for SMA bonus programme
You will find information on the SMA bonus programme at
www.SMA-Bonus.com.
®
Wireless Technology.
* QR-Code is a registered trademark of DENSO WAVE INCORPORATED.
2.3.2 Symbols on the Type Label
Symbol Explanation
Beware of dangerous voltage.
The inverter operates at high voltages. All work on the inverter must be
carried out by skilled persons only.
Beware of hot surface.
The inverter can become hot during operation. Avoid contact during
operation.
Observe all documentation accompanying the inverter.
Installation Manual STP20TLHE-IA-IEN122222 11
Safety SMA Solar Technology AG
IP54
Symbol Explanation
The inverter must not be disposed of together with household waste. For
more information on disposal, see Section 12.5 "Disposing of the inverter"
(page84).
CE marking
The inverter complies with the requirements of the applicable EC directives.
The inverter does not have a transformer.
Direct current (DC)
Three-phase alternating current (AC) with neutral conductor
Protection rating IP54.
The inverter is protected against dust deposits in the interior and against
splashes of water from all angles.
Outdoor
The inverter is suitable for outdoor installation.
RAL quality mark for solar products
The inverter complies with the requirements of the German Institute for
Quality Assurance and Labelling.
Device class label
The inverter is equipped with a wireless component that complies with the
harmonised standards.
Certified safety
Th e in verter c omp lies wi th t he r equ irement s of the Eur ope an E quipment and
Product Safety Act.
Australian mark of conformity
Korean mark of conformity.
Chinese mark of conformity
12 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Unpacking
3 Unpacking
3.1 Scope of Delivery
Check the delivery for completeness and for any visible external damage. Contact your specialist
dealer if the delivery is incomplete or you find any damage.
Object Quantity Description
A 1 Sunny Tripower
B 1 Handle of the DC switch-disconnector*
C 1Back panel
D 1 Installation manual including user manual, document set with explanations
and certificates, supplementary sheet with the default settings
E 6 Negative DC connector
F 6 Positive DC connector
G 12 Sealing plugs
H 1 Eye bolt M8 for securing the inverter to the back panel
I 2 Cheese-head screw M5x10 for attaching the enclosure to the back panel
K 1 Cable gland for AC connection
L 1 Counter nut for cable gland at AC connection
M 1 Clamping bracket M6 for additional earthing
N 1 Cheese-head screw M6 for earth terminal
O 1 Conical spring washer M6 for earth terminal
P 2 Cheese-head screws M5x20 for upper enclosure lid (replacement)
Installation Manual STP20TLHE-IA-IEN122222 13
Unpacking SMA Solar Technology AG
Object Quantity Description
Q 2 Conical spring washers M5 for upper enclosure lid (replacement)
R 1 Jumper cable for deactivating the reverse current protection
*optional
3.2 Identifying the Inverter
You can identify the inverter by the type label. The type label is located on the right-hand side of the
enclosure.
The serial number (Serial No.) and the type (Type/Model) of the inverter, as well as device-specific
characteristics are specified on the type label.
14 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Product Description
A
C
D
E
F
G
B
4 Product Description
4.1 Sunny Tripower
The Sunny Tripower is a PV inverter which converts the direct current of the PV array to grid-compliant
alternating current and performs three-phase feed-in into the electricity grid.
Position Description
A Type label
B Ventilation grid
C LEDs
D Display
E DC switch-disconnector*
F Lower enclosure lid
G Upper enclosure lid
*optional
Installation Manual STP20TLHE-IA-IEN122222 15
Product Description SMA Solar Technology AG
kVAr
kVArh
kWh
MVArh
MWh
kW
kWh
A
B
C
D
E
F
G
H
K
L
M
I
4.2 Display
The display shows the current operating data of the inverter (e.g. status, power, input voltage) as well
as faults and disturbances.
Position Description Explanation
A Power Displays the current power
B Day Displays the daily energy
C Total Displays the total amount of energy fed in until now
D Active functions The symbols indicate which communication or power
regulation functions are enabled.
E Phase assignment The phase assignment states the line conductor for
which output current or output voltage is currently
being displayed.
F Electricity grid event number Event number of a disturbance in the electricity grid
G Output voltage/output
current
H Inverter event number Event number of a device disturbance
I Input voltage/input current The display alternately shows the input voltage and
K PV array event number Event number of a disturbance in the PV array
L Text line The text line shows event messages.
The display alternately shows the output voltage and
the output current of the line conductor. The display
automatically switches between the 3 connected line
conductors.
the input current of the inverter.
16 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Product Description
Position Description Explanation
M Power and yield curve The diagram shows the changes in power over the
last 16 feed-in hours or the energy yields over the last
16 days. Tap the display once to switch between
views.
Symbols on the Display
Symbol Designation Explanation
Tap symbol You can operate the display by tapping it:
• Single tap: the backlight switches on or the
display scrolls one message further.
• Double tap: the display shows successively the
firmware version, the serial number or
de sig nat ion of th e in ver ter , th e Bluetooth Ne tID ,
the configured country data set and display
language.
Telephone receiver Device disturbance present. Contact the SMA Service
Line.
Spanner Signifies a disturbance that can be resolved on-site.
Bluetooth Bluetooth communication is enabled.
Bluetooth connection Bluetooth connection to other devices is active.
Multi-function relay The multi-function relay is active.
Temperature symbol The power of the inverter is limited due to excessive
temperature.
Power limitation The external active power limitation via the
Power Reducer Box is active.
PV array ‒
Inverter ‒
Installation Manual STP20TLHE-IA-IEN122222 17
Product Description SMA Solar Technology AG
Symbol Designation Explanation
Grid relay When the grid relay is closed, the inverter feeds into
the grid. When the grid relay is open, the inverter is
disconnected from the electricity grid.
Electricity grid ‒
4.3 DC switch-disconnector
The DC switch-disconnector is optional. If you have ordered the inverter with DC switch-disconnector,
it will be pre-installed in the inverter on delivery.
Using the DC switch-disconnector, you can manually close or interrupt the electric circuit between the
PV array and the inverter. The DC switch-disconnector enables safe disconnection of the inverter from
the PV array. The disconnection takes place at all poles.
4.4 Communication
The inverter is equipped with a Bluetooth interface as standard. A multi-function relay and an
additional communication interface (e.g. RS485) can be retrofitted. The inverter can communicate
with special SMA communication products (e.g. data logger, software) or other inverters via the
communication interfaces (for information on supported communication products, see
www.SMA.de/en). You can only set the inverter's parameters using SMA communication products.
If you communicate via Bluetooth, you can protect the inverter with a plant password for the user and
a plant password for the installer. All inverters are delivered with the same factory-installed plant
passwords. You must change plant passwords using a communication product in order to protect the
PV plant from unauthorised access.
If you do not communicate via Bluetooth, deactivate the Bluetooth communication
(see Section 6.6.1 "Bluetooth" (page50)). This protects your PV plant from unauthorised access.
Various parameter displays
Depending on the type of communication, RS485 or Bluetooth, the parameters and
messages are displayed differently on the communication products.
Example: parameter display for testing the fan
• If you are using RS485: parameter "CoolSys.FanTst"
•If you are using Bluetooth: parameter "Fan test"
18 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Product Description
4.5 Multi-Function Relay
The inverter may be equipped with a multi-function relay. The multi-function relay is an interface for
error messages or for controlling loads. Disturbances can be transmitted to a disturbance sensor.
For this purpose, the multi-function relay switches the disturbance sensor on and off. The multi-function
relay can control a load via a contactor. For this purpose, the inverter determines when the load is
switched on and off, depending on the operating parameters and measured values. You can
configure the multi-function relay for various operating modes (see Technical Description
"Multi-Function Relay and OptiTrac Global Peak" available at www.SMA.de/en).
4.6 Feed-In Management
The Sunny Tripower is capable of utilising reactive power and can feed reactive power into the grid
via the setting of a default value for the displacement power factor (cos φ). Additionally, this inverter
is also equipped with advanced feed-in management functions, e.g. power limitation and dynamic
grid support. You can enable and configure these functions depending on the requirements set by the
network operator.
You can find detailed information on setting the parameters of these functions in the Technical
Description "Measured Values and Parameters" at www.SMA.de/en in the "Technical Description"
category for the respective inverter.
Installation Manual STP20TLHE-IA-IEN122222 19
Product Description SMA Solar Technology AG
4.7 Reverse Current Protection
Every input area of the inverter is equipped with a diode as reverse current protection. A reverse
current between the input areas is therefore not possible.
If only input area A is used and the reverse current resistance of the PV modules is complied with, the
reverse current protection at input area A can be bypassed (see Section 6.7 "Activating and
Deactivating the Reverse Current Protection at Input Area A" (page52)). Bypassing the reverse
current protection slightly increases the inverter efficiency.
The reverse current protection at input area B cannot be deactivated.
20 STP20TLHE-IA-IEN122222 Installation Manual
SMA Solar Technology AG Mounting
5 Mounting
5.1 Safety
DANGER!
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.
CAUTION!
Risk of injury due to the heavy weight of the inverter (approx. 53 kg)
• Take the weight of the inverter into account for transport.
• Select a suitable mounting location and mounting surface.
• When mounting the back panel, use fastening material suitable for the mounting
surface.
• Two people are needed to mount the inverter.
CAUTION!
Risk of burns due to hot enclosure parts
• Mount the inverter in such a way that it cannot be touched inadvertently.
5.2 Selecting the Mounting Location
Consider the following requirements when selecting the mounting location:
• The mounting method and location must be suitable for the weight and size of the inverter
(see Section 13 "Technical Data" (page85)).
• Mount on a solid surface.
• The mounting location must at all times be clear and safely accessible without the use of
additional aids such as scaffolding or lifting platforms. Non-fulfillment of these criteria may
restrict execution of service assignments.
Installation Manual STP20TLHE-IA-IEN122222 21
Mounting SMA Solar Technology AG
max. 15°
300 mm
500 mm
50 mm
300 mm
300 mm
• Mount vertically or tilted backwards by max. 15°.
• The connection area must point downwards.
• Never mount the device with a forward tilt.
• Never mount the device with a sideways tilt.
• Do not mount horizontally.
• Mount the inverter at eye level. Given the weight of the device, this will facilitate disassembling
if service work is necessary.
• The ambient temperature should be below 40°C to ensure optimum operation.
• Do not expose the inverter to direct solar irradiation as this can cause overheating and lead to
power reduction.
• In living areas, do not mount the unit on plasterboard walls or similar in order to avoid audible
vibrations. When in operation, the inverter emits noise which may be perceived as annoying in
living areas.
• Observe the recommended clearances to the walls
as well as to other inverters or other objects as
shown in the diagram. This ensures adequate heat
dissipation and sufficient room to operate the
optional DC switch-disconnector.
• If multiple inverters are mounted in areas with high
ambient temperatures, increase the clearances
between the inverters and ensure an adequate
fresh-air supply. This prevents a reduction in inverter
power as a result of high temperatures (details on
tempe rature der ating can be fou nd in the Te chnical
Information "Temperature Derating" at
www.SMA.de/en).
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SMA Solar Technology AG Mounting
Display
5.3 Mounting the Inverter
1. Use the back panel as a drilling template and mark the positions of the drill holes.
2. Mount the back panel.
For this, use 1 upper hole on the right and on the left
and the hole in the middle.
Installation Manual STP20TLHE-IA-IEN122222 23
Mounting SMA Solar Technology AG
A
3. Hang the inverter in the back panel in such a way
that the enclosure of the inverter lies flush with the
back panel.
– For two people to transport the inverter, use the
recessed grips at the bottom and at the same
time hold the upper edge of the enclosure lid.
– For transport by crane, you can attach 2 ring
bolts to the top of the inverter
(see A: M10, diameter = 10 mm). To do this,
remove the filler-plugs and screw in the ring
bolts as far as they will go.
4. If necessary, remove the ring bolts after transport
and re-attach the filler-plugs.
5. Loosen all 6 captive screws of the lower enclosure
lid.
6. Lift and remove the lower enclosure lid from below.
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SMA Solar Technology AG Mounting
7. Screw the supplied eye bolt into the drill hole
provided in order to secure the enclosure against
removal. Only tighten the eye bolt hand-tight.
8. In order to secure the enclosure to the back panel,
fasten the underside of the enclosure with the two
M5x10 cheese-head screws supplied
(torque: 6.0 Nm).
9. Check to ensure that the inverter is securely in place.
☑ The inverter is now securely mounted to the wall.
If the inverter is not to be connected immediately, re-attach the lower enclosure lid:
– Dock the lower enclosure lid at an angle and
attach. The captive screws must protrude.
– Pre-screw all six screws and then tighten them in
the sequence shown on the right
(torque: 2.0 Nm).
Installation Manual STP20TLHE-IA-IEN122222 25
Mounting SMA Solar Technology AG
Optional Anti-Theft Protection
To protect the inverter from theft, you can secure it to the back panel with a padlock.
The padlock must meet the following requirements:
•Size:
A: 6 mm … 8 mm diameter
B: 23 mm … 29 mm
C: 23 mm … 28 mm
D: 39 mm … 50 mm
E: 13 mm … 18 mm
•Stainless
• Hardened shackle
• Secured lock cylinder
Storage of the key
Keep the key in a safe place in case it is needed for service purposes.
1. Put the shackle of the padlock through the eye of
the previously mounted eye bolt and close the
padlock.
☑ The inverter is now protected against theft.
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SMA Solar Technology AG Electrical Connection
L1
L2
L3
N
PE
A
B
C
D
EFGH
I
6 Electrical Connection
6.1 Safety
NOTICE!
Electrostatic discharge can damage the inverter
Internal components of the inverter can be irreparably damaged by electrostatic
discharge.
• Earth yourself before touching any components.
6.2 Overview of the Connection Area
Object Description
A DC lid
B Plug for connecting the optional multi-function relay
C Plug for connecting the optional RS485 communication module
D Terminal for grid connection
E Switch for changing the display language to English (for service purposes)
F Rotary switch for setting the Bluetooth NetID
G Screw for releasing and raising the display
H Rotary switch for setting the country data set and the display language
I Slot for SD card (for service purposes only)
Installation Manual STP20TLHE-IA-IEN122222 27
Electrical Connection SMA Solar Technology AG
+ +
A1 A2 A3 B1 B2 B3
A1 A2 A3 B1 B2
B3
ABC D E
F
Object Description
A Jack for the handle of the DC switch-disconnector*
B Enclosure opening M20 for the optional multi-function relay
C Enclosure opening M32 for the optional communication via RS485
D Additional enclosure opening M20
E Enclosure opening M32 for the AC connection
F DC connectors for connecting the strings
* optional
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SMA Solar Technology AG Electrical Connection
6.3 Connection to the Electricity Grid (AC)
6.3.1 Conditions for the AC Connection
You must comply with the connection requirements of your network operator.
Residual-current protective device
The inverter is equipped with an integrated all-pole-sensitive residual-current monitoring unit. The
inverter can automatically differentiate between residual currents and normal leading leakage
currents.
If the network operator stipulates a residual-current protective device, you must use a residual-current
protective device that triggers in the event of a residual-current of 100 mA or more.
Further information on the use of a residual current protective device can be found in the Technical
Information "Criteria for selecting an RCD" at www.SMA.de/en.
Cable requirements
• External diameter: 14 mm … 25 mm
• Conductor cross-section: max. 16 mm²; with bootlace ferrule: max. 10 mm².
• Stripping length: 12 mm
• The cable must be dimensioned in accordance with the local and national regulations for the
dimensioning of cables. The requirements for the minimum conductor cross-section derive from
these regulations. Examples of factors influencing cable dimensioning are: nominal AC current,
type of cable, routing method, cable bundling, ambient temperature and maximum desired line
losses (for calculation of line losses, see design software Sunny Design from software version
2.0 at www.SMA.de/en).
Connection of a second protective conductor
In some installation countries, a second protective conductor is required to prevent a touch current in
the event of a malfunction in the original protective conductor.
For installation countries falling within the scope of validity of the IEC standard 62109, the following
requirements are applicable:
• Installation of the protective conductor on the AC terminal with a conductor cross-section of at
least 10 mm² Cu.
or
• Installation of a second protective conductor on the earth terminal with the same cross-section
as the original protective conductor on the AC terminal (see Section 6.3.3 "Connecting the
Second Protective Conductor" (page33)).
In each case, observe the applicable regulations for the site.
Installation Manual STP20TLHE-IA-IEN122222 29
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