SMA 15000TL User manual

STP20TLHE-IA-IEN122222 | IMEN-STP20TLHE | Version 2.2
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

SMA Solar Technology AG Table of Contents
Installation Manual STP20TLHE-IA-IEN122222 3
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

Table of Contents SMA Solar Technology AG
4 STP20TLHE-IA-IEN122222 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 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

SMA Solar Technology AG Table of Contents
Installation Manual STP20TLHE-IA-IEN122222 5
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

Table of Contents SMA Solar Technology AG
6 STP20TLHE-IA-IEN122222 Installation Manual
13.7 Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.8 Distribution systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.9 Data Storage Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
14 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

SMA Solar Technology AG Information on this Manual
Installation Manual STP20TLHE-IA-IEN122222 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:
• 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.

Information on this Manual SMA Solar Technology AG
8 STP20TLHE-IA-IEN122222 Installation Manual
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.

SMA Solar Technology AG Safety
Installation Manual STP20TLHE-IA-IEN122222 9
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.
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.
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.

Safety SMA Solar Technology AG
10 STP20TLHE-IA-IEN122222 Installation Manual
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"
(page58)).
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 electrically
conductive surfaces so that there is continuous conduction and earthing them in order to
ensure maximum protection for property and persons.

SMA Solar Technology AG Safety
Installation Manual STP20TLHE-IA-IEN122222 11
2.3 Explanation of Symbols
2.3.1 Symbols on the Inverter
* QR-Code is a registered trademark of DENSO WAVE INCORPORATED.
2.3.2 Symbols on the Type Label
Symbol Explanation
Operation display
Indicates the operating state of the inverter.
A disturbance has occurred.
Read section 11 "Troubleshooting" (page75) 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.
NOTICE, danger!
• Observe the connection requirements for the second protective
conductor in Section 6.3.1 "Conditions for the AC Connection"
(page29).
QR Code®* for SMA bonus programme
You will find information on the SMA bonus programme at
www.SMA-Bonus.com.
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.

Safety SMA Solar Technology AG
12 STP20TLHE-IA-IEN122222 Installation Manual
The inverter must not be disposed of together with household waste. For
more information on disposal, see Section 12.5 "Disposing of the inverter"
(page84).
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
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
IP54

SMA Solar Technology AG Unpacking
Installation Manual STP20TLHE-IA-IEN122222 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 Quantity Description
A1 Sunny Tripower
B1 Handle of the DC switch-disconnector*
C1Back panel
D1 Installation manual including user manual, document set with explanations
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 back panel
I2 Cheese-head screw M5x10 for attaching the enclosure to the back 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 (replacement)

Unpacking SMA Solar Technology AG
14 STP20TLHE-IA-IEN122222 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
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.
Q2 Conical spring washers M5 for upper enclosure lid (replacement)
R1 Jumper cable for deactivating the reverse current protection
Object Quantity Description

SMA Solar Technology AG Product Description
Installation Manual STP20TLHE-IA-IEN122222 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
Position Description
AType label
BVentilation grid
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 STP20TLHE-IA-IEN122222 Installation Manual
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
APower Displays the current power
BDay Displays the daily energy
CTotal Displays the total amount of energy fed in until now
DActive functions The symbols indicate which communication or power
regulation functions are enabled.
EPhase assignment The phase assignment states the line 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 line conductor. The display
automatically switches between the 3 connected line
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
LText line The text line shows event messages.
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 STP20TLHE-IA-IEN122222 17
Symbols on the Display
MPower 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.
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
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 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 ‒
Position Description Explanation

Product Description SMA Solar Technology AG
18 STP20TLHE-IA-IEN122222 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.
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" (page50)). This protects your PV plant from unauthorised access.
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 ‒
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"
Symbol Designation Explanation

SMA Solar Technology AG Product Description
Installation Manual STP20TLHE-IA-IEN122222 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 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.

Product Description SMA Solar Technology AG
20 STP20TLHE-IA-IEN122222 Installation Manual
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" (page52)). Bypassing the reverse
current protection slightly increases the inverter efficiency.
The reverse current protection at input area B cannot be deactivated.