SMA 15000TL User manual

STP15-20TLEE-IA-en-23 | Version 2.3
EN
PV Inverters
SUNNY TRIPOWER 15000TL Economic Excellence
SUNNY TRIPOWER 20000TL Economic Excellence
Installation Manual

SMA Solar Technology AG Table of Contents
Installation Manual STP15-20TLEE-IA-en-23 3
Table of Contents
1 Information on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.1 Symbols on the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 Reverse-Current Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 21
5.3 Mounting the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table of Contents SMA Solar Technology AG
4 STP15-20TLEE-IA-en-23 Installation Manual
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 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.2 AC Connection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.3.3 Connecting the Second Protective Conductor. . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 Connection of the PV Array (DC) . . . . . . . . . . . . . . . . . . . . . . . 34
6.4.1 Conditions for DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.4.2 Assembling the DC Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.4.3 Disassembling the DC Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.4.4 Connecting the PV Array (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.5 Setting the Country Data Set and Display Language . . . . . . . . 40
6.5.1 Checking the Country Data Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.5.2 Extension of the Deactivation Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.5.3 Setting the Country Data Set and Language Using Rotary Switches . . . . . . 47
6.6 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.6.1 Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.6.2 Multi-Function Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.6.3 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.7 Activating and Deactivating Reverse-Current Protection at
Input Area A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1 Commissioning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2 Display Messages during the Start-Up Phase . . . . . . . . . . . . . . 54
8 Disconnecting the Inverter from Voltage Sources . . . . . . 55

SMA Solar Technology AG Table of Contents
Installation Manual STP15-20TLEE-IA-en-23 5
9 Maintenance and Cleaning. . . . . . . . . . . . . . . . . . . . . . . . 58
9.1 Cleaning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2 Checking the Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.1 Cleaning the Ventilation Grids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.2 Cleaning the Fan at the Bottom of the Inverter . . . . . . . . . . . . . . . . . . . . . . . 60
9.2.3 Cleaning the Fan on the Left-Hand Side of the Inverter Enclosure . . . . . . . . 61
9.2.4 Testing the Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.1 LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.2 Event Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.3 Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
11.1 Checking the PV Array for Earth Faults . . . . . . . . . . . . . . . . . . . 72
11.2 Checking the Function of the Varistors . . . . . . . . . . . . . . . . . . . 74
12 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
12.1 Dismounting the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
12.2 Replacing the Enclosure Lid . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.3 Packing the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.4 Storing the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.5 Disposing of the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
13 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
13.1 DC/AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
13.1.1 Sunny Tripower 15000TL Economic Excellence. . . . . . . . . . . . . . . . . . . . . . 80
13.1.2 Sunny Tripower 20000TL Economic Excellence . . . . . . . . . . . . . . . . . . . . . . 81
13.2 General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
13.3 Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
13.4 Climatic Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
13.5 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table of Contents SMA Solar Technology AG
6 STP15-20TLEE-IA-en-23 Installation Manual
13.6 Torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
13.7 Data Storage Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
15 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

SMA Solar Technology AG Information on this Manual
Installation Manual STP15-20TLEE-IA-en-23 7
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 from firmware version 2.54:
• Sunny Tripower 15000TL Economic Excellence (STP 15000TLEE-10)
• Sunny Tripower 20000TL Economic Excellence (STP 20000TLEE-10)
Keep this manual in a convenient place for future reference.
1.2 Target Group
This manual is for the use of electrically skilled persons. The tasks described in this manual must 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.
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, can result in property damage.

Information on this Manual SMA Solar Technology AG
8 STP15-20TLEE-IA-en-23 Installation Manual
Information
Information provides tips that are valuable for effective installation and operation of the
product.
☑ This symbol indicates the result of an action.

SMA Solar Technology AG Safety
Installation Manual STP15-20TLEE-IA-en-23 9
2 Safety
2.1 Appropriate Usage
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 Sunny Tripower
The Sunny Tripower is suitable for indoor and outdoor use.
The Sunny Tripower must only be operated with PV arrays of protection class II, in accordance with
IEC 61730, application class A. Do not connect any energy sources other than PV modules to the
Sunny Tripower.
When designing the PV plant, ensure that the permitted operating range of all components is
complied with at all times. The free design program "Sunny Design", version 2.0 or higher
(see 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 the Sunny Tripower. You must also ensure that all
measures recommended by the module manufacturer for the 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.
Capacitive leakage 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 this
leakage current depends on the mounting type of the PV modules (e.g. foil on metal roof)
and on the weather (rain, snow). This normal leakage current must not exceed 50 mA, as
otherwise the inverter would automatically disconnect from the electricity grid as a
protective measure. For further information on this subject, see the Technical Information
"Capacitive Leakage Currents" at www.SMA.de/en.

Safety SMA Solar Technology AG
10 STP15-20TLEE-IA-en-23 Installation Manual
2.2 Safety Precautions
2.3 Explanation of Symbols
2.3.1 Symbols on the Inverter
DANGER!
Danger to life due to electric shock
When exposed to sunlight, the PV array generates a dangerous direct voltage which is
present in the DC conductors or the live components in the inverter.
• Do not touch the DC conductors.
• Do not touch live components in the inverter.
• Prior to performing any work on the inverter, always disconnect it from any voltage
sources as described in this document (see Section 8 "Disconnecting the Inverter from
Voltage Sources" (page55)).
CAUTION!
Risk of burns due to hot enclosure parts
During operation, the upper enclosure lid and the enclosure body may get hot.
• Only touch the lower enclosure lid during operation.
Earthing of the PV array
Comply with the local regulations for earthing the modules and the PV array.
SMA Solar Technology AG recommends connecting the array frame and other electrically
conductive surfaces so that there is continuous conduction, and earthing them in order to
ensure maximum protection for property and persons.
Symbol Explanation
Operation indicator
Shows the operating state of the inverter
A disturbance has occurred.
Read Section 11 "Troubleshooting" (page72) to remedy the disturbance.
SMA Bluetooth® Wireless Technology
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.

SMA Solar Technology AG Safety
Installation Manual STP15-20TLEE-IA-en-23 11
2.3.2 Symbols on the Type Label
NOTICE, danger!
• Observe the connection requirements for a second protective
conductor in Section 6.3.1 "Conditions for AC Connection"
(page29).
QR Code®
Links to additional information on the inverter can be found at
www.SMA-Solar.com.
Symbol Explanation
Beware of hazardous voltage.
The inverter operates at high voltages. All work on the inverter must be
carried out by skilled persons only.
Warning of hot surface.
The inverter can get hot during operation. Avoid contact during operation.
Observe all documentation supplied with the inverter.
The inverter must not be disposed of together with the household waste.
For more information on disposal, see Section 12.5 "Disposing of the
Inverter" (page79).
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
Degree of protection IP65
The product is protected against dust intrusion and water jets from any
angle.
Symbol Explanation

Safety SMA Solar Technology AG
12 STP15-20TLEE-IA-en-23 Installation Manual
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
The inverter complies with the requirements of the European Equipment and
Product Safety Act.
Australian mark of conformity
Korean mark of conformity
Chinese mark of conformity
Symbol Explanation

SMA Solar Technology AG Unpacking
Installation Manual STP15-20TLEE-IA-en-23 13
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 Number Description
A1 Sunny Tripower
B1 Handle of the DC switch-disconnector*
C1 Rear panel
D1 Installation manual including user manual, document set with declarations
and certificates, supplementary sheet with the default settings
E6 Negative DC connector
F6 Positive DC connector
G12 Sealing plugs
H1 Eye bolt M8 for securing the inverter to the rear panel
I2 Cheese-head screw M5x10 for attaching the enclosure to the rear panel
K1 Cable gland for AC connection
L1 Counter nut for cable gland at AC connection
M1 Clamping bracket M6 for additional earthing
N1 Cheese-head screw M6 for earth terminal
O1 Conical spring washer M6 for earth terminal
P2 Cheese-head screws M5x20 for upper enclosure lid (spares)

Unpacking SMA Solar Technology AG
14 STP15-20TLEE-IA-en-23 Installation Manual
*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
housing.
The inverter type (type/model), serial number (serial no.) and other device-specific characteristics are
specified on the type label.
Q2 Conical spring washers M5 for upper enclosure lid (spares)
R1 Jumper cable for deactivating the reverse-current protection
Object Number Description

SMA Solar Technology AG Product Description
Installation Manual STP15-20TLEE-IA-en-23 15
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.
*Optional
Item Description
AType label
BVentilation grids
CLEDs
DDisplay
EDC switch-disconnector*
FLower enclosure lid
GUpper enclosure lid
A
C
D
E
F
G
B

Product Description SMA Solar Technology AG
16 STP15-20TLEE-IA-en-23 Installation Manual
4.2 Display
The display shows the current operating data of the inverter (e.g. status, power, input voltage) as well
as errors and disturbances.
Item Description Explanation
APower Displays the current power
BDay Displays the amount of energy fed in so far today
CTotal Total amount of energy fed in until now
DActive functions The symbols indicate which communication or power
regulation functions are enabled.
ELine conductor assignment The phase conductor assignment indicates the phase
conductor for which output current or output voltage is
currently being displayed.
FElectricity grid event number Event number of a disturbance in the electricity grid
GOutput voltage/
output current
The display alternately shows the output voltage and the
output current of the respective phase conductor. The display
automatically switches between the three connected phase
conductors.
HInverter event number Event number of a device disturbance
IInput voltage/input current The display alternately shows the input voltage and the input
current of the inverter.
KPV array event number Event number of a disturbance in the PV array
kVAr
kVArh
kWh
MVArh
MWh
kW
kWh
A
B
C
D
E
F
G
H
K
L
M
I

SMA Solar Technology AG Product Description
Installation Manual STP15-20TLEE-IA-en-23 17
Symbols on the Display
LText line The text line shows event messages.
MPower and yield curve The diagram shows the power curve over the last 16 feed-in
hours or the energy yields over the last 16 days. Tap the
display once to switch between views.
Symbol Description Explanation
Tap symbol You can operate the display by tapping it:
• Single tap: the backlight switches on or the
display scrolls to the next display message.
• Tapping twice: the display successively shows
the firmware version, the serial number or
designation of the inverter, the Bluetooth NetID,
the configured country data set and display
language.
Telephone receiver Device disturbance present. Contact the
SMA Service Line.
Spanner Disturbance which 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 Inverter power limitation is active due to excessive
temperature.
Power limitation External active power limitation via the
Power Reducer Box is active.
PV array ‒
Item Description Explanation

Product Description SMA Solar Technology AG
18 STP15-20TLEE-IA-en-23 Installation Manual
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.
By means of 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 the safe disconnection of
the inverter from the PV array. 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). The inverter parameters can only be set via 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 the 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" (page48)). This will protect your PV plant from unauthorised access.
Inverter ‒
Grid relay When the grid relay is closed, the inverter feeds into
the electricity grid. When the grid relay is open, the
inverter is disconnected from the electricity grid.
Electricity grid ‒
Varying parameter display
Depending on the type of communication, RS485 or Bluetooth, the parameters and
messages are displayed differently on the communication products.
Example: display of parameter for fan test
• If you are using RS485: parameter "CoolSys.FanTst"
•If you are using Bluetooth: parameter "Fan test"
Symbol Description Explanation

SMA Solar Technology AG Product Description
Installation Manual STP15-20TLEE-IA-en-23 19
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 fault indicator. For this
purpose, the multi-function relay switches the fault indicator 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 manual of the multi-function relay available at
www.SMA.de/en).
4.6 Feed-In Management
The Sunny Tripower is reactive-power capable 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.
4.7 Operating Parameters
Various operating parameters control the functional performance of the inverter. Apart from the
country data set, the operating parameters of the inverter can only be adjusted using an
SMA communication product (information on the parameters can be found in the Technical
Description "Parameters and Measured Values" at www.SMA-Solar.com). 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 6.5.3 "Setting the Country Data Set and Language Using Rotary Switches" (page47)).
Error message required by standards
In some countries, an error message is required by standards, e.g. IEC 62109-2.
In order to meet the requirements of IEC 62109-2, either the multi-function relay must be
used as a fault indicator and configured accordingly or a connection to Sunny Portal must
be available and the fault alarm must be activated in Sunny Portal (for information on fault
alarm via e-mail, see the Sunny Portal user manual at www.SMA-Solar.com).

Product Description SMA Solar Technology AG
20 STP15-20TLEE-IA-en-23 Installation Manual
4.8 Reverse-Current Protection
Each inverter input area is equipped with a diode as reverse-current protection. This prevents any
reverse currents occurring between the input areas.
If only input area A is in use 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 Reverse-Current Protection at Input Area A" (page50)). Bypassing the reverse-current
protection slightly increases inverter efficiency.
The reverse-current protection at input area B cannot be deactivated.