SMA STP 50-40 User manual

Operating manual
SUNNY TRIPOWER CORE1 (STP 50-40 / STP 50-41)
STP50-4x-BE-en-23 | Version 2.3ENGLISH

Important information SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-232
Important information
Depending on availability, the product is or is not equipped with Wi-Fi functionality. The reason for
this is the currently problematic semiconductor supply, caused by the COVID-19 pandemic.
If the product is not equipped with Wi-Fi functionality, please use the standard Ethernet
communication interface included for commissioning, configuration and integrating the product into
a network.
If integrating the product into a Wi-Fi network is absolutely necessary, this can be done using a
commercial Wi-Fi repeater, which is connected to the product via Ethernet.
Without the Wi-Fi function, a direct connection to the user interface by scanning the QR code on the
product with the SMA 360° app is not possible. Use a different type of connection.

Legal Provisions
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 3
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. 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
Phone [phone]
Fax [phone]
www.SMA.de
E-mail: [email protected]
Status: 2/14/2023
Copyright © 2022 SMA Solar Technology AG. All rights reserved.

Table of contents SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-234
Table of contents
1 Information on this Document................................................. 7
1.1 Validity ........................................................................................................................ 7
1.2 Target Group.............................................................................................................. 7
1.3 Content and Structure of this Document ................................................................... 7
1.4 Levels of warning messages ...................................................................................... 7
1.5 Symbols in the Document .......................................................................................... 8
1.6 Typographical Elements in the Document................................................................. 8
1.7 Designations in the Document................................................................................... 8
1.8 Additional Information ............................................................................................... 8
2 Safety ........................................................................................ 10
2.1 Intended Use .............................................................................................................. 10
2.2 IMPORTANT SAFETY INSTRUCTIONS.................................................................... 10
3 Scope of Delivery..................................................................... 16
4 Product Overview.................................................................... 17
4.1 Product Description .................................................................................................... 17
4.2 Symbols on the Product ............................................................................................. 18
4.3 Interfaces and Functions ............................................................................................ 20
4.4 LED Signals................................................................................................................. 25
4.5 Display messages....................................................................................................... 26
4.6 System Overview ....................................................................................................... 27
4.6.1 Circuitry Overview.................................................................................. 28
4.6.2 Communication Overview...................................................................... 29
5 Mounting .................................................................................. 30
5.1 Requirements for Mounting ....................................................................................... 30
5.2 Mounting the product ................................................................................................ 33
6 Electrical Connection................................................................ 36
6.1 Overview of the Connection Area ............................................................................ 36
6.2 AC Connection........................................................................................................... 36
6.2.1 Requirements for the AC Connection .................................................... 36
6.2.2 Connecting the Inverter to the Utility Grid............................................. 38
6.3 Connecting the Network Cables............................................................................... 40
6.4 Connecting the Multifunction Relay .......................................................................... 42
6.4.1 Procedure for connecting the multifunction relay.................................. 42
6.4.2 Operating Modes of the Multifunction Relay ....................................... 42
6.4.3 Connection Options................................................................................ 43

Table of contents
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 5
6.4.4 Connection to the Multifunction Relay .................................................. 46
6.5 DC Connection........................................................................................................... 48
6.5.1 Requirements for the DC Connection .................................................... 48
6.5.2 Assembling the DC Connectors ............................................................. 48
6.5.3 Connecting the PV Array........................................................................ 50
6.5.4 Disassembling the DC Connectors ........................................................ 53
7 Commissioning ......................................................................... 55
7.1 Commissioning Procedure ......................................................................................... 55
7.2 Commissioning the Inverter........................................................................................ 56
7.3 Selecting a configuration option ............................................................................... 58
8 Operation ................................................................................. 61
8.1 Activating and Operating the Display...................................................................... 61
8.2 Establishing a connection to the user interface ........................................................ 61
8.2.1 Establishing a Direct Connection via Ethernet....................................... 61
8.2.2 Establishing a direct connection via WLAN.......................................... 61
8.2.3 Establishing a Connection via Ethernet in the local network................ 64
8.2.4 Establishing a Connection via WLAN in the Local Network ............... 65
8.3 Logging In and Out of the User Interface................................................................. 65
8.4 Start Page Design of the User Interface.................................................................... 68
8.5 Displaying and Downloading the Stored Data........................................................ 71
8.6 Activating the Smart Inverter Screen......................................................................... 72
8.7 Starting the Installation Assistant............................................................................... 72
8.8 Activate WPS Function............................................................................................... 73
8.9 Switching WLAN On and Off................................................................................... 74
8.10 Switching the Dynamic Power Display Off............................................................... 75
8.11 Changing the Password............................................................................................. 75
8.12 Generating or Changing a Product Key................................................................... 75
8.13 Configuring the Service Access................................................................................. 76
8.14 Changing Operating Parameters.............................................................................. 77
8.15 Configuring the Country Data Set............................................................................. 78
8.16 Configuring the Active Power Mode ........................................................................ 79
8.17 Configuring Q on Demand 24/7............................................................................. 79
8.18 Changing the Operating Mode of the Multifunction Relay .................................... 80
8.19 Configuring the Modbus Function............................................................................. 81
8.20 Activating the Receipt of Control Signals (Only for Italy)........................................ 82
8.21 Setting SMA ShadeFix............................................................................................... 82
8.22 Generating the I-V Characteristic Curve................................................................... 83
8.23 Setting the Rated Residual Current of the Residual-Current Device ........................ 83
8.24 Activating or Deactivating SMA ArcFix.................................................................... 84

Table of contents SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-236
8.25 Activating and Setting String-Failure Detection ........................................................ 85
8.26 Saving the Configuration in a File............................................................................. 87
8.27 Adopting a Configuration from a File....................................................................... 87
8.28 Firmware Update ....................................................................................................... 88
8.28.1 Activating Automatic Firmware Update ................................................ 88
8.28.2 Updating Firmware with Update File via the User Interface................ 88
8.28.3 Updating Firmware with Update File via the USB Flash Drive ............ 89
8.28.4 Searching for and Installing New Firmware via the User Interface .... 90
9 Disconnecting the Inverter from Voltage Sources................. 91
10 Clean the product..................................................................... 94
11 Troubleshooting ....................................................................... 95
11.1 Forgotten Password.................................................................................................... 95
11.2 Product Key Lost......................................................................................................... 96
11.3 Event Messages ......................................................................................................... 97
11.4 Checking the PV System for Ground Faults.............................................................. 112
11.5 Resetting the Operation Inhibition after Detection of an Arc Fault ......................... 115
12 Decommissioning the Inverter ................................................ 116
13 Technical Data.......................................................................... 120
14 Accessories ............................................................................... 124
15 Contact...................................................................................... 125
16 EU Declaration of Conformity................................................. 126
17 UK Declaration of Conformity ................................................ 127

1 Information on this Document
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 7
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 to 3.11.##.R
• STP 50-41 (SunnyTripowerCORE1) from firmware version ≥ 4.01.01.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 to safely disconnect SMA inverters
• 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 manualSTP50-4x-BE-en-238
NOTICE
Indicates a situation which, if not avoided, can result in property damage.
1.5 Symbols in the Document
Icon 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
Example
Sections describing activities to be performed by qualified persons only
1.6 Typographical Elements in the Document
Typographical ele-
ment
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
• Go to Settings > Date.
[Button]
[Key]
• Button or key to be clicked on or
pressed down
• Select [Enter].
# • Placeholder for variable
components (e.g., parameter
names)
• Parameter WCtlHz.Hz#
1.7 Designations in the Document
Complete designation Designation in this document
Sunny Tripower CORE1 Inverter, product
1.8 Additional Information
For more information, please go to www.SMA-Solar.com.

1 Information on this Document
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 9
Title and information content Type of information
"PUBLIC CYBER SECURITY - Guidelines for a Secure PV System
Communication"
Technical Information
"SMA GRID GUARD 10.0 - Grid Management Services via Inverter
and System Controller"
Technical Information
"Simplified implementation of the network and system protection in
PV systems"
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 as well as an overview of all SMA Modbus registers
Technical Information
"SUNSPEC MODBUS"
Information on the activation of the SunSpec Modbus interface and
information on the SunSpec Modbus profiles
Technical Information
"SMA MODBUS"
Information on the SMA Modbus interface
Technical Information
"Integrated Plant Control"
Detailed explanation of the function and description for setting the
function
Technical Information
"Arc-fault circuit interrupter in the Sunny Tripower Core1 (STP
50-41)"
Technical Information
"SMASPEEDWIRE FIELDBUS" Technical information
"Temperature Derating" Technical Information
"I-V diagnostic function: Determination of the generator characteristic
curve by the inverter for fault detection in the PV array"
Technical Information

2 Safety SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-2310
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 intended for use in industrial environments.
The product complies with EN55011 of class A, group 1:
The product is not intended to be used in living areas and cannot provide protection of radio
reception against interference signals in such environments.
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 an integrated 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 the coupling capacity of all PV
modules does not exceed 12.6μF (for information on how to determine 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
appropriate.
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 any regional, state, provincial, federal or national laws, regulations
or standards that apply 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
Keep the manual for future reference.

2 Safety
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 11
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.
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 ensure 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 ensure it cannot be reconnected before
working on the device.
• Only touch the cables of the PV modules on their insulation.
• 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 manualSTP50-4x-BE-en-2312
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 product is classified as "TNV-1" and offers protection against
overvoltages of up to 1.5kV.
WARNING
Danger to life due to fire and explosion
In rare cases, an explosive gas mixture can be generated inside the product under fault
conditions. In this state, switching operations can cause a fire inside the product 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 product.
• Ensure that unauthorized persons have no access to the product.
• Do not operate the DC load-break switch on the inverter in case of an error.
• 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 product (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 product. 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 product (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 product.

2 Safety
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 13
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 manualSTP50-4x-BE-en-2314
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 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 devices 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.
NOTICE
Damage to the product 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.
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.

2 Safety
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 15
A country data set must be set for feed-in operation
From firmware version 3.13.##.R, the activation conditions for feed-in operation were
changed.
To ensure the inverter begins feed-in operation during initial commissioning, a country data set
must be set (for instance via the installation assistant on the user interface of the product, or via
a communication product).
If no country data set is set, then feed-in operation will be stopped. This state is signaled by the
green and red LEDs flashing simultaneously.
The inverter will automatically start feed-in operation only after the inverter configuration is
completed.
The country data set must be set correctly.
If you select a country data set which is not valid for your country and purpose, it can cause a
disturbance in the PV system and lead to problems with the grid operator. When selecting the
country data set, you must always observe the locally applicable standards and directives as
well as the properties of the PV system (e.g. PV system size, grid-connection point).
• If you are not sure which standards and directives are valid for your country or purpose,
contact the grid operator.
When the utility grid is disconnected, the parameter settings are not applied
If you have made parameter settings and subsequently disconnected the utility grid without
having first disconnected the DC side from the inverter, the settings cannot be saved. Proceed
as follows if you would like to disconnect the utility grid after you have made parameter
settings:
• Disconnect the DC side from the inverter.
• Wait 5 minutes.
• Disconnect the utility grid.

3 Scope of Delivery SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-2316
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
L
D
HK
Figure 1: Components included in 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 Alternative seal insert with reduced clamping range (26mm to
39mm) for M63 cable glands
K 1 3-pole terminal block
L 1 Quick reference guide with password label on the rear side
The label contains the following information:
• PIC (Product Identification Code) identification key for
registering the system in SunnyPortal
• RID (Registration Identifier) registration ID for registering the
system in SunnyPortal
• WLAN password WPA2-PSK (WiFi Protected Access 2 -
Preshared Key) for direct connection to the inverter via WLAN

4 Product Overview
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 17
4 Product Overview
4.1 Product Description
A
F
D
M
LK
G
B
C
E
O
H
I
J
N
O
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 Label with QR Code for scanning via the SMA 360° App and easy con-
nection to the inverter's user interface via Wi-Fi (only available if the prod-
uct is equipped with a Wi-Fi interface)
G Cable glands for data cables
H DC load-break switch
I DC connector
J Fan bracket with three fans

4 Product Overview SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-2318
Position Designation
K 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 lable:
• Device type (Model)
• Serial number (Serial No. or S/N)
• Date of manufacture
• Device-specific characteristics
L 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
M Enclosure opening for AC connection
N Enclosure opening for additional cable
O Enclosure opening for carrying handle
4.2 Symbols on the Product
Icon 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 documentations
Observe all documentations supplied with the product.
Inverter
Together with the green LED, this symbol indicates the operating state of the in-
verter.

4 Product Overview
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 19
Icon Explanation
Observe the documentations
Together with the red LED, this symbol indicates an error.
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 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.
UKCA marking
The product complies with the regulations of the applicable laws of England,
Wales and Scotland.
RoHS
RoHS labeling
The product complies with the requirements of the applicable EU directives.

4 Product Overview SMA Solar Technology AG
Operating manualSTP50-4x-BE-en-2320
Icon Explanation
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the applicable Australian stan-
dards.
ICASA
The product complies with the requirements of the South African standards for
telecommunication.
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 configuration and monitoring
The product is equipped as standard with an integrated webserver, which provides a user interface
for configuring and monitoring the product.
Once the connection has been established to the smart device, use a terminal (e.g. smartphone,
tablet or laptop) to connect to the product's user interface using a web browser.
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
product 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 product has been commissioned.