SMA SUNNY TRIPOWER CORE1 User manual

SUNNY TRIPOWER
STP50-40-BE-en-15 | Version 1.5ENGLISH
Operating manual
SunnyTripowerCORE1 (STP 50-40)

Legal Provisions SMA Solar Technology AG
Operating manualSTP50-40-BE-en-152
Legal Provisions
The information contained in these documents is the property of SMA Solar Technology AG. No
part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or
by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior
written permission of SMA Solar Technology AG. Internal reproduction used solely for the purpose
of product evaluation or other proper use is allowed and does not require prior approval.
SMA Solar Technology AG makes no representations or warranties, express or implied, with
respect to this documentation or any of the equipment and/or software it may describe, including
(with no limitation) any implied warranties of utility, merchantability, or fitness for any particular
purpose. All such representations or warranties are expressly disclaimed. Neither SMA Solar
Technology AG nor its distributors or dealers shall be liable for any indirect, incidental, or
consequential damages under any circumstances.
The exclusion of implied warranties may not apply in all cases under some statutes, and thus the
above exclusion may not apply.
Specifications are subject to change without notice. Every attempt has been made to make this
document complete, accurate and up-to-date. Readers are cautioned, however, that product
improvements and field usage experience may cause SMA Solar Technology AG to make changes
to these specifications without advance notice, or per contract provisions in those cases where a
supply agreement requires advance notice. SMA Solar Technology AG shall not be responsible for
any damages, including indirect, incidental or consequential damages, caused by reliance on the
material presented, including, but not limited to, omissions, typographical errors, arithmetical errors
or listing errors in the content material.
SMA Warranty
You can download the current warranty conditions from the Internet at www.SMA-Solar.com.
Software Licenses
The licenses for the installed software modules (open source) can be found in the user interface of
the product.
Trademarks
All trademarks are recognized, even if not explicitly identified as such. Missing designations do not
mean that a product or brand is not a registered trademark.
SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. [phone]
Fax [phone]
www.SMA.de
Email: [email protected]
Status: 8/22/2019
Copyright © 2019 SMA Solar Technology AG. All rights reserved.

Table of Contents
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 3
Table of Contents
1 Information on this Document................................................. 6
1.1 Validity........................................................................................................................ 6
1.2 Target Group.............................................................................................................. 6
1.3 Content and Structure of this Document ................................................................... 6
1.4 Levels of Warning Messages.................................................................................... 6
1.5 Symbols in the Document .......................................................................................... 7
1.6 Typographies in the Document.................................................................................. 7
1.7 Designation in the document..................................................................................... 7
1.8 Additional Information............................................................................................... 8
2 Safety ........................................................................................ 9
2.1 Intended Use .............................................................................................................. 9
2.2 IMPORTANT SAFETY INSTRUCTIONS.................................................................... 9
3 Scope of Delivery ..................................................................... 14
4 Product Overview .................................................................... 15
4.1 Product Description.................................................................................................... 15
4.2 Symbols on the Product ............................................................................................. 16
4.3 Interfaces and Functions ............................................................................................ 18
4.4 LED Signals................................................................................................................. 21
4.5 Display messages....................................................................................................... 22
4.6 System Overview ....................................................................................................... 23
4.6.1 Circuitry Overview.................................................................................. 24
4.6.2 Communication Overview ..................................................................... 25
5 Mounting................................................................................... 26
5.1 Requirements for Mounting ....................................................................................... 26
5.2 Mounting the Inverter................................................................................................. 29
6 Electrical Connection ................................................................ 32
6.1 Overview of the Connection Area............................................................................ 32
6.2 AC Connection........................................................................................................... 33
6.2.1 Requirements for the AC Connection.................................................... 33
6.2.2 Connecting the Inverter to the Utility Grid ............................................ 34
6.3 Connecting the Network Cables............................................................................... 36
6.4 Connecting the Multifunction Relay.......................................................................... 38
6.4.1 Procedure for connecting the multifunction relay ................................. 38
6.4.2 Operating Modes of the Multifunction Relay....................................... 38
6.4.3 Connection Options ............................................................................... 39

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Operating manualSTP50-40-BE-en-154
6.4.4 Connection to the Multifunction Relay .................................................. 42
6.5 DC Connection........................................................................................................... 44
6.5.1 Requirements for the DC Connection.................................................... 44
6.5.2 Assembling the DC Connectors............................................................. 44
6.5.3 Connecting the PV Array........................................................................ 46
6.5.4 Disassembling the DC Connectors ........................................................ 49
7 Commissioning ......................................................................... 51
7.1 Commissioning Procedure ......................................................................................... 51
7.2 Commissioning the Inverter........................................................................................ 52
7.3 Selecting a configuration option............................................................................... 53
7.4 Starting the Self-Test (for Italy and Dubai)................................................................ 55
8 Operation ................................................................................. 56
8.1 Activating and Operating the Display...................................................................... 56
8.2 Establishing a connection to the user interface ........................................................ 56
8.2.1 Establishing a Direct Connection via Ethernet ...................................... 56
8.2.2 Establishing a direct connection via WLAN ......................................... 57
8.2.3 Establishing a Connection via Ethernet in the local network ............... 58
8.2.4 Establishing a Connection via WLAN in the Local Network ............... 59
8.3 Logging In and Out of the User Interface................................................................. 60
8.4 Start Page Design of the User Interface.................................................................... 62
8.5 Displaying and Downloading the Stored Data........................................................ 65
8.6 Activating the Smart Inverter Screen......................................................................... 65
8.7 Starting the Installation Assistant............................................................................... 66
8.8 Activate WPS Function............................................................................................... 67
8.9 Switching WLAN On and Off................................................................................... 67
8.10 Switching the Dynamic Power Display Off............................................................... 68
8.11 Changing the Password............................................................................................. 69
8.12 Changing Operating Parameters.............................................................................. 69
8.13 Configuring the Country Data Set............................................................................. 70
8.14 Configuring the Active Power Mode ........................................................................ 71
8.15 Configuring Q on Demand 24/7............................................................................. 71
8.16 Changing the Operating Mode of the Multifunction Relay .................................... 72
8.17 Configuring the Modbus Function............................................................................. 73
8.18 Activating the Receipt of Control Signals (Only for Italy)........................................ 74
8.19 Setting SMA OptiTrac Global Peak ......................................................................... 75
8.20 Setting the Rated Residual Current of the Residual-Current Device ........................ 75
8.21 Activating String-Failure Detection ............................................................................ 75
8.22 Saving the Configuration in a File............................................................................. 76
8.23 Adopting a Configuration from a File....................................................................... 76

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Operating manual STP50-40-BE-en-15 5
8.24 Updating the Firmware.............................................................................................. 77
9 Disconnecting the Inverter from Voltage Sources ................. 79
10 Cleaning the Inverter ............................................................... 81
11 Troubleshooting........................................................................ 82
11.1 Forgotten Password.................................................................................................... 82
11.2 Event Messages ......................................................................................................... 83
11.3 Checking the PV System for Ground Faults.............................................................. 97
12 Decommissioning the Inverter.................................................102
13 Technical Data ..........................................................................106
14 Accessories ...............................................................................110
15 Contact ......................................................................................111
16 EU Declaration of Conformity .................................................113

1 Information on this Document SMA Solar Technology AG
Operating manualSTP50-40-BE-en-156
1 Information on this Document
1.1 Validity
This document is valid for:
• STP 50-40 (SunnyTripowerCORE1) from firmware version ≥ 3.00.00.R
1.2 Target Group
This document is intended for qualified persons and end users. Only qualified persons are allowed
to perform the activities marked in this document with a warning symbol and the caption
"Qualifiedperson". Tasks that do not require any particular qualification are not marked and can
also be performed by end users. 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, repairing and
using electrical devices and installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of all applicable laws, standards and directives
• Knowledge of and compliance with this document and all safety information
1.3 Content and Structure of this Document
This document describes the mounting, installation, commissioning, configuration, operation,
troubleshooting and decommissioning of the product as well as the operation of the product user
interface.
You will find the latest version of this document and further information on the product in PDF format
and as eManual at www.SMA-Solar.com. You can also call up the eManual via the user interface
of the product.
Illustrations in this document are reduced to the essential information and may deviate from the real
product.
1.4 Levels of Warning Messages
The following levels of warning messages may occur when handling the product.
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

1 Information on this Document
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 7
NOTICE
Indicates a situation which, if not avoided, can result in property damage.
1.5 Symbols in the Document
Symbol Explanation
Information that is important for a specific topic or goal, but is not safety-rele-
vant
☐
Indicates a requirement for meeting a specific goal
☑
Desired result
✖
A problem that might occur
Example
Sections describing activities to be performed by qualified persons only
1.6 Typographies in the Document
Typography Use Example
bold • Messages
• Terminals
• Elements on a user interface
• Elements to be selected
• Elements to be entered
• Connect the insulated
conductors to the terminals
X703:1 to X703:6.
• Enter 10 in the field
Minutes.
>• Connects several elements to be
selected • Select Settings > Date.
[Button]
[Key]
• Button or key to be selected or
pressed • Select [Enter].
# • Placeholder for variable
components (e.g., parameter
names)
• Parameter WCtlHz.Hz#
1.7 Designation in the document
Complete designation Designation in this document
Sunny Tripower CORE1 Inverter, product

1 Information on this Document SMA Solar Technology AG
Operating manualSTP50-40-BE-en-158
1.8 Additional Information
For more information, please go to www.SMA-Solar.com.
Title and information content Type of information
"Application for SMAGridGuard Code" Form
"PUBLIC CYBER SECURITY - Guidelines for a Secure PV System
Communication" Technical information
"SMA GRID GUARD 10.0 - Grid management services through
SMA Inverter" Technical Information
"SUNNY TRIPOWER CORE1 - Simplified Implementation of Grid
and PV System Protection in PV Systems in accordance with VDEAR-
N 4105"
Technical Information
"Efficiency and Derating"
Efficiency and derating behavior of the SMA inverters
Technical Information
"Short-Circuit Currents"
Information on short-circuit currents of SMA PV inverters
Technical Information
"Parameters and Measured Values"
Overview of all inverter operating parameters and their configura-
tion options
Technical Information
"SMA and SunSpec Modbus® Interface"
Information on the Modbus interface
Technical Information
"Modbus® parameters and measured values"
Device-specific register HTML file
Technical Information
"Integrated Plant Control"
Detailed explanation of the function and description for setting the
function
Technical Information
"SMASPEEDWIRE FIELDBUS" Technical information
"Temperature Derating" Technical Information

2 Safety
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 9
2 Safety
2.1 Intended Use
The SunnyTripower is a transformerless PV inverter, with 6 MPPtrackers, that converts the direct
current of the PV array to grid-compliant, three-phase current and feeds it into the utility grid.
The product is suitable for indoor and outdoor use.
The product must only be operated with PV modules of protection class II in accordance with
IEC61730, application class A. The PV modules must be compatible with this product.
The product is not equipped with a transformer and therefore has no galvanic isolation. The
product must not be operated with PV modules whose outputs are grounded. This can cause the
product to be destroyed. The product may be operated with PV modules whose frame is grounded.
PV modules with a high capacity to ground must only be used if their coupling capacity does not
exceed 12.6μF (for information on how to calculate the coupling capacity, see the Technical
Information "Leading Leakage Currents" at www.SMA-Solar.com).
All components must remain within their permitted operating ranges and their installation
requirements at all times.
The product must only be used in countries for which it is approved or released by SMA Solar
Technology AG and the grid operator.
Use SMA products only in accordance with the information provided in the enclosed
documentation and with the locally applicable laws, regulations, standards and directives. Any
other application may cause personal injury or property damage.
Alterations to the SMA products, e.g., changes or modifications, are only permitted with the express
written permission of SMA Solar Technology AG. Unauthorized alterations will void guarantee and
warranty claims and in most cases terminate the operating license. SMA Solar Technology AG
shall not be held liable for any damage caused by such changes.
Any use of the product other than that described in the Intended Use section does not qualify as the
intended use.
The enclosed documentation is an integral part of this product. Keep the documentation in a
convenient, dry place for future reference and observe all instructions contained therein.
This document does not replace and is not intended to replace any local, state, provincial, federal
or national laws, regulations or codes applicable to the installation, electrical safety and use of the
product. SMA Solar Technology AG assumes no responsibility for the compliance or non-
compliance with such laws or codes in connection with the installation of the product.
The type label must remain permanently attached to the product.
2.2 IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This section contains safety information that must be observed at all times when working.
The product has been designed and tested in accordance with international safety requirements. As
with all electrical or electronical devices, there are residual risks despite careful construction. To
prevent personal injury and property damage and to ensure long-term operation of the product,
read this section carefully and observe all safety information at all times.

2 Safety SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1510
DANGER
Danger to life due to electric shock when live components or DC cables are
touched
When exposed to light, the PV modules generate high DC voltage which is present in the DC
cables. Touching live DC cables results in death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources and make sure it cannot be reconnected
before working on the device.
• Do not disconnect the DC connectors under load.
• Wear suitable personal protective equipment for all work on the product.
DANGER
Danger to life due to electric shock from touching an ungrounded PV module
or array frame
Touching ungrounded PV modules or array frames results in death or lethal injuries due to electric
shock.
• Connect and ground the frame of the PV modules, the array frame and the electrically
conductive surfaces so that there is continuous conduction. Observe the applicable local
regulations.
DANGER
Danger to life due to electric shock when touching live system components in
case of a ground fault
If a ground fault occurs, parts of the system may still be live. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Disconnect the product from voltage sources and make sure it cannot be reconnected
before working on the device.
• Touch the cables of the PV array on the insulation only.
• Do not touch any parts of the substructure or frame of the PV array.
• Do not connect PV strings with ground faults to the inverter.

2 Safety
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 11
DANGER
Danger to life due to electric shock in case of overvoltages and if surge
protection is missing
Overvoltages (e.g. in the event of a flash of lightning) can be further conducted into the building
and to other connected devices in the same network via the network cables or other data cables
if there is no surge protection. Touching live parts and cables results in death or lethal injuries due
to electric shock.
• Ensure that all devices in the same network are integrated in the existing overvoltage
protection.
• When laying the network cable outdoors, ensure that there is suitable surge protection at
the network cable transition from the product outdoors to the network inside the building.
• The Ethernet interface of the inverter is classified as "TNV-1" and offers protection against
overvoltages of up to 1.5kV.
WARNING
Danger to life due to fire or explosion
In rare cases, an explosive gas mixture can be generated inside the inverter under fault
conditions. In this state, switching operations can cause a fire inside the inverter or explosion.
Death or lethal injuries due to hot or flying debris can result.
• In the event of a fault, do not perform any direct actions on the inverter.
• Ensure that unauthorized persons have no access to the inverter.
• Do not operate the DC load-break switch on the inverter in the event of ground fault
• Disconnect the PV array from the inverter via an external disconnection device. If there is no
disconnecting device present, wait until no more DC power is applied to the inverter.
• Disconnect the AC circuit breaker, or keep it disconnected in case it has already tripped,
and secure it against reconnection.
• Only perform work on the inverter (e.g., troubleshooting, repair work) when wearing
personal protective equipment for handling of hazardous substances (e.g., safety gloves,
eye and face protection, respiratory protection).
WARNING
Risk of injury due to toxic substances, gases and dusts.
In rare cases, damages to electronic components can result in the formation of toxic substances,
gases or dusts inside the inverter. Touching toxic substances and inhaling toxic gases and dusts
can cause skin irritation, burns or poisoning, trouble breathing and nausea.
• Only perform work on the inverter (e.g., troubleshooting, repair work) when wearing
personal protective equipment for handling of hazardous substances (e.g., safety gloves,
eye and face protection, respiratory protection).
• Ensure that unauthorized persons have no access to the inverter.

2 Safety SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1512
WARNING
Danger to life due to electric shock from destruction of the measuring device
due to overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the
enclosure of the measuring device. Touching the live enclosure of the measuring device results in
death or lethal injuries due to electric shock.
• Only use measuring devices with a DC input voltage range of 1000V or higher.
CAUTION
Risk of burns due to hot enclosure parts
The enclosure and the enclosure lid may get hot during operation. The DC load-break switch can
not become hot.
• Do not touch hot surfaces.
• Wait until the inverter has cooled down before touching the enclosure or enclosure lid.
CAUTION
Risk of injury due to weight of product
Injuries may result if the product is lifted incorrectly or dropped while being transported or
mounted.
• Carry and lift the product upright with the help of several people. Take the weight and the
center of gravity of the product into account. The center of gravity is on the side of the AC-
Connection Unit.
• Wear suitable personal protective equipment for all work on the product.
• Transport the product using the carrying handles or hoist. Take the weight of the product
into account.
• Use all carrying handles provided during transport with carrying handles.
• Do not use the carrying handles as attachment points for hoist equipment (e.g. straps, ropes,
chains). Insert eye bolts into threads provided on top of the product to attach the hoist
system.
NOTICE
Damage to the enclosure seal in subfreezing conditions
If you open the product when temperatures are below freezing, the enclosure seals can be
damaged. Moisture can penetrate the product and damage it.
• Only open the product if the ambient temperature is not below -5°C.
• If a layer of ice has formed on the enclosure seal when temperatures are below freezing,
remove it prior to opening the product (e.g. by melting the ice with warm air).

2 Safety
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 13
NOTICE
Damage to the product due to sand, dust and moisture ingress
Sand, dust and moisture penetration can damage the product and impair its functionality.
• Only open the product if the humidity is within the thresholds and the environment is free of
sand and dust.
• Do not open the product during a dust storm or precipitation.
• Close tightly all enclosure openings.
NOTICE
Damage due to cleaning agents
The use of cleaning agents may cause damage to the product and its components.
• Clean the product and all its components only with a cloth moistened with clear water.
NOTICE
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through
electrostatic discharge.
• Ground yourself before touching any component.
NOTICE
High costs due to inappropriate Internet tariff
Depending on use, the data volume of the product transferred via the Internet may vary in size.
The data volume depends, for example, on the number of inverters in the system, the frequency
of device updates, the frequency of data transfer to SunnyPortal or the use of FTP push. High
costs for the Internet connection can be the result.
• SMA Solar Technology AG recommends using an Internet flat rate.
Change to the names and units of grid parameters to comply with the grid-
connection requirements in accordance with Regulation (EU) 2016/631
(valid from April 27, 2019)
To comply with the EU grid-connection requirements (valid from April 27, 2019) the names
and units of grid parameters were changed. This change is valid from firmware version
≥3.00.00.R if a country data set for fulfilling the EU grid-connection requirements (valid from
2019-04-27) is set. Names and units of grid parameters for inverters with firmware version
≤2.99.99.R are not affected by this change and remain valid. This also applies from firmware
version ≥3.00.00.R if a country data set that is valid for countries outside the EU is set.

3 Scope of Delivery SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1514
3 Scope of Delivery
Check the scope of delivery for completeness and any externally visible damage. Contact your
distributor if the scope of delivery is incomplete or damaged.
B C E F
J
I
A
+
_
G
K
D
H
Figure 1: Components included in the scope of delivery
Position Quantity Designation
A 1 Inverter
B 4 Foot
C 8 Hexagon bolt M8x40
D 8 Washer
E 4 Carrying handle
F 12 Positive DC connector
G 12 Negative DC connector
H 24 Sealing plug for DC connectors
I 1 Cable gland M63 with counter nut
J 1 3-pole terminal block
K 1 Quick Reference Guide

4 Product Overview
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 15
4 Product Overview
4.1 Product Description
A
D
L
KJ
F
B
C
E
N
G
H
I
M
N
Figure 2: Design of the product
Position Designation
A Cover
B AC Connection Unit
C DC Connection Unit
D LEDs
The LEDs indicate the operating state of the product.
E Display (optional)
The product is equipped with a display upon request. The display shows
the current operating data and events or errors.
F Cable glands for data cables
G DC load-break switch
H DC connector
I Fan bracket with three fans

4 Product Overview SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1516
Position Designation
J Type label
The type label clearly identifies the product. The type label must remain
permanently attached to the product. You will find the following informa-
tion on the type label:
• Device type (Model)
• Serial number (Serial No. or S/N)
• Date of manufacture
• Device-specific characteristics
K Additional label with details for registration in SunnyPortal and WLAN
password:
• Identification key (PIC) for registration in Sunny Portal
• Registration ID (RID) for registration in Sunny Portal
• WLAN password (WPA2-PSK) for the direct connection to the user
interface of the inverter via WLAN
L Enclosure opening for AC connection
M Enclosure opening for additional cable
N Enclosure opening for carrying handle
4.2 Symbols on the Product
Symbol Explanation
Beware of a danger zone
This symbol indicates that the product must be additionally grounded if addi-
tional grounding or equipotential bonding is required at the installation site.
Beware of electrical voltage
The product operates at high voltages.
Beware of hot surface
The product can get hot during operation.
Observe the documentation
Observe all documentation supplied with the product.
Observe the documentation
Together with the red LED, this symbol indicates an error.

4 Product Overview
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 17
Symbol Explanation
Inverter
Together with the green LED, this symbol indicates the operating state of the in-
verter.
Data transmission
Together with the blue LED, this symbol indicates the status of the network con-
nection.
Grounding conductor
This symbol indicates the position for connecting a grounding conductor.
Grounding
This symbol indicates the position for the connection of an additional ground-
ing conductor.
Three-phase alternating current with neutral conductor
Direct current
The product is has no galvanic isolation.
WEEE designation
Do not dispose of the product together with the household waste but in accor-
dance with the disposal regulations for electronic waste applicable at the in-
stallation site.
The product is suitable for outdoor installation.
Degree of protectionIP65
The product is protected against the penetration of dust and water that is di-
rected as a jet against the enclosure from all directions.
CE marking
The product complies with the requirements of the applicable EU directives.
RoHS
RoHS labeling
The product complies with the requirements of the applicable EU directives.
ICASA
The product complies with the requirements of the South African standards for
telecommunication.

4 Product Overview SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1518
Symbol Explanation
08492-17-03337
ANATEL
The product complies with the requirements of the Brazilian standards for
telecommunication.
Este equipamento opera em caráter secundário, isto é, não tem direito a pro-
teção contra interferência prejudicial, mesmo de estações do mesmo tipo, e
não pode causar interferência a sistemas operando em caráter primário.
The product complies with the Moroccan safety and EMC requirements for
electronic products.
4.3 Interfaces and Functions
The inverter can be equipped or retrofitted with the following interfaces and functions:
User interface for monitoring and configuration
The product is equipped as standard with an integrated webserver, which provides a user interface
for configuring and monitoring the product. The product user interface can be called up via the web
browser if there is an existing connection to an end device (e.g. computer, tablet PC or
smartphone).
Smart Inverter Screen
The Smart Inverter Screen enables you to view the status display and to display the current power
and consumption on the user interface login page. This gives you an overview of the most important
inverter data without having to log into the user interface.
The Smart Inverter Screen is deactivated by default. The Smart Inverter Screen can be activated via
the user interface once the inverter has been commissioned.
SMA Speedwire
The product is equipped with SMASpeedwire as standard. SMASpeedwire is a type of
communication based on the Ethernet standard. SMASpeedwire is designed for a data transfer
rate of 100Mbps and enables optimum communication between Speedwire devices within
systems.
SMA Webconnect
The inverter is equipped with a Webconnect function as standard. The Webconnect function
enables direct data transmission between the inverter and SunnyPortal without any additional
communication device and for a maximum of 4 inverters per visualized system. In PV systems with
more than 4 inverters, there is the option of establishing data transmission between the inverters
and SunnyPortal via the data logger (e.g., SMADataManager) or distributing the inverters over
several systems. You can directly access your visualized system via the web browser on your end
device.

4 Product Overview
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 19
WLAN
The product is equipped with a WLAN interface as standard. The inverter is delivered with the
WLAN interface activated as standard. If you do not want to use WLAN, you can deactivate the
WLAN interface.
In addition, the product has a WPS function. The WPS function is for automatically connecting the
product to a network (e.g. via router) and establish a direct connection between the product and
an end device.
Expanding the radio range in the WLAN network
In order to expand the radio range of the inverter in the WLAN network, you can install the
Antenna Extension Kit accessory set in the inverter.
Modbus
The product is equipped with a Modbus interface. The Modbus interface is deactivated by default
and must be configured as needed.
The Modbus interface of the supported SMA products is designed for industrial use – via SCADA
systems, for example – and has the following tasks:
• Remote query of measured values
• Remote setting of operating parameters
• Setpoint specifications for system control
Module slots
The inverter is standard-equipped with two module slots. The module slots are located on the
communication assembly and allow additional modules to be connected (e.g. SMA Sensor
Module). The modules are available as accessories. The installation of two identical modules is not
permissible.
SMA RS485 Module
With the assembly of the RS485 Module, the inverter can communicate with special
SMAcommunication products (Information on assembly and connection see manual of the SMA
RS485 Module). The SMA RS485 Module can be retrofitted.
Antenna Extension Kit
Within the WLAN network, the Antenna Extension Kit enables the radio range of the inverter to be
upgraded (Information on assembly and connection see manual of the Antenna Extension Kit). The
Antenna Extension Kit can be retrofitted.
SMA Sensor Module
The SMA Sensor Module has different interfaces for connecting various sensors (i.e. temperature
sensor, irradiation sensor, anemometer or energy meter). The SMA Sensor Module converts the
signals of the connected sensors and transmits them to the inverter. The SMA Sensor Module can
be retrofitted.

4 Product Overview SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1520
SMA I/O modules
The SMA I/O Module enables the inverter to perform grid management services (for information
on installation and connection, see the manual of the SMA I/O Module). The SMA I/O Module
can be retrofitted.
Grid management services
The product is equipped with service functions for grid management.
Depending on the requirements of the grid operator, you can activate and configure the functions
(e.g. active power limitation) via operating parameters.
Grid and PV system protection
The inverter is equipped with redundant and monitored switching elements for grid disconnection
simplifying grid and PV system protection required according to VDE-AR-N4105, In this case the
disconnection devices integrated in the inverter can replace an external tie switch. An external,
certified monitoring unit with an integrated PV system protection relay (potential-free) and an alarm
contact (implemented as break contact) must be included. In addition, the inverter must be
equipped with firmware version > 3.01.00.R and an SMA I/O Module. The inverter can be
connected to the monitoring unit of the grid and PV system protection device via the SMA I/O
Module and receive the signal for grid disconnection (for further information see technical
information "SUNNY TRIPOWER CORE1 - Simplified Implementation of Grid and PV System
Protection in PV System in accordance with VDE-AR-N 4105:2018-11").
Multifunction Relay
The inverter is equipped with a multifunction relay as standard. The multifunction relay is an
interface that can be configured for the operating mode used by a particular system.
SMAOptiTracGlobalPeak
SMAOptiTracGlobalPeak is an advancement of SMAOptiTrac and allows the operating point of
the inverter to follow the optimal operating point of the PV array (MPP) precisely at all times. In
addition, with the aid of SMAOptiTracGlobalPeak, the inverter detects several maximum power
points in the available operating range, such as may occur particularly with partially shaded
strings. SMA OptiTrac Global Peak is enabled by default.
String-Failure Detection
The string-failure detection measures the total current of every input and continuously calculates the
mean values for the inputs in question. The total currents are compared with the mean values. If a
total current exceeds or falls short of the mean value by the set tolerance value, an event is
reported. Marginally increased total currents are reliably detected over several query intervals and
distinguished from typical current fluctuations of the PV array. String-failure detection is deactivated
by default and must be activated. In addition, the tolerance value can be set via the user interface
and the mean values read off.
Surge arrester type 1 and 2
On the AC and DC side, the inverter is equipped with slots for type 1 and 2 surge protection
devices. The surge protection devices limit dangerous overvoltages. The surge protection devices
can be retrofitted.