SMA SUNNY BOY 3.0-US User manual

SUNNY BOY
SBxx-US-1XP-40-BA-en-12 | Version 1.2ENGLISH
User Manual
SUNNY BOY 3.0-US / 3.8-US / 5.0-US /
6.0-US / 7.0-US / 7.7-US

Legal Provisions SMA Solar Technology America LLC
User ManualSBxx-US-1XP-40-BA-en-122
Legal Provisions
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 America LLC.
Neither SMA Solar Technology AmericaLLC nor SMA Solar Technology Canada Inc. makes
representations, 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 AmericaLLC nor its distributors or dealers nor
SMA Solar Technology Canada Inc. 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 America LLC and/or
SMA Solar Technology Canada Inc. to make changes to these specifications without advance
notice, or per contract provisions in those cases where a supply agreement requires advance
notice. SMA 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 used software modules can be called up on 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 America LLC
6020 West Oaks Blvd.
Suite 300 Rocklin, CA 95765 U.S.A.
SMA Solar Technology Canada Inc.
2425 Matheson Blvd. E
7th Floor
Mississauga, ON L4W 5K4
Canada
Status: 6/29/2018
Copyright © 2018 SMA Solar Technology America LLC. All rights reserved.

Table of Contents
SMA Solar Technology America LLC
User Manual SBxx-US-1XP-40-BA-en-12 3
Table of Contents
1 Information on this Document................................................. 5
1.1 Validity........................................................................................................................ 5
1.2 Target Group.............................................................................................................. 5
1.3 Content and Structure of this Document ................................................................... 5
1.4 Levels of warning messages ...................................................................................... 5
1.5 Symbols in the Document .......................................................................................... 6
1.6 Typographies in the document.................................................................................. 6
1.7 Designation in the document..................................................................................... 7
1.8 Additional Information ............................................................................................... 7
2 Safety ........................................................................................ 8
2.1 Intended Use .............................................................................................................. 8
2.2 IMPORTANT SAFETY INSTRUCTIONS.................................................................... 9
3 Product Overview .................................................................... 12
3.1 Product Description .................................................................................................... 12
3.2 Symbols on the Product ............................................................................................. 13
3.3 Interfaces and Functions ............................................................................................ 14
3.4 LED Signals................................................................................................................. 18
3.5 Display messages....................................................................................................... 19
4 Operation ................................................................................. 20
4.1 Establishing a connection to the user interface ........................................................ 20
4.1.1 Establishing a Direct Connection via Ethernet ...................................... 20
4.1.2 Establishing a direct connection via WLAN ......................................... 20
4.1.3 Establishing a Connection via Ethernet in the local network ............... 22
4.1.4 Establishing a Connection via WLAN in the Local Network ............... 23
4.2 Logging In and Out of the User Interface................................................................. 24
4.3 Activating and Operating the Display...................................................................... 24
4.4 Start Page Design of the User Interface.................................................................... 26
4.5 Displaying and Downloading the Stored Data........................................................ 28
4.6 Starting the Installation Assistant............................................................................... 29
4.7 Secure Power Supply Operation .............................................................................. 30
4.7.1 Activating Secure Power Supply Operation......................................... 30
4.7.2 Deactivating Secure Power Supply Operation..................................... 31
4.8 Activate WPS Function............................................................................................... 31
4.9 Switching WLAN On and Off................................................................................... 32
4.10 Switching the Dynamic Power Display Off............................................................... 33
4.11 Changing the Password............................................................................................. 33

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4.12 Changing Operating Parameters.............................................................................. 34
4.13 Configuring the Country Data Set............................................................................. 35
4.14 Activating of the Rapid Shutdown DC discharge function ...................................... 35
4.15 Configuring the Modbus Function............................................................................. 36
4.16 Setting SMA OptiTrac Global Peak ......................................................................... 36
4.17 Deactivating the Arc-Fault Circuit Interrupter (AFCI)................................................ 37
4.18 Saving the Configuration in a File............................................................................. 37
4.19 Adopting a Configuration from a File....................................................................... 37
4.20 Updating the Firmware.............................................................................................. 38
5 Cleaning the Inverter ............................................................... 40
6 Troubleshooting........................................................................ 41
6.1 Forgotten Password.................................................................................................... 41
6.2 Event Messages ......................................................................................................... 42
6.3 Checking the PV System for Ground Faults.............................................................. 60
6.4 Resetting the Operation Inhibition after Detection of an Arc Fault ......................... 64
7 Compliance Information .......................................................... 66
8 Contact ...................................................................................... 67

1 Information on this Document
SMA Solar Technology America LLC
User Manual SBxx-US-1XP-40-BA-en-12 5
1 Information on this Document
1.1 Validity
This document is valid for:
• SB3.0-1SP-US-40 (Sunny Boy 3.0-US)
• SB3.8-1SP-US-40 (Sunny Boy 3.8-US)
• SB5.0-1SP-US-40 (Sunny Boy 5.0-US)
• SB6.0-1SP-US-40 (Sunny Boy 6.0-US)
• SB7.0-1SP-US-40 (Sunny Boy 7.0-US)
• SB7.7-1SP-US-40 (Sunny Boy 7.7-US)
• SB3.0-1TP-US-40 (Sunny Boy 3.0-US)
• SB3.8-1TP-US-40 (Sunny Boy 3.8-US)
• SB5.0-1TP-US-40 (Sunny Boy 5.0-US)
• SB6.0-1TP-US-40 (Sunny Boy 6.0-US)
• SB7.0-1TP-US-40 (Sunny Boy 7.0-US)
• SB7.7-1TP-US-40 (Sunny Boy 7.7-US)
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 configuration, operation and troubleshooting 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
at www.SMA-Solar.com.
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.

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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.
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
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].

1 Information on this Document
SMA Solar Technology America LLC
User Manual SBxx-US-1XP-40-BA-en-12 7
1.7 Designation in the document
Complete designation Designation in this document
SMA Solar Technology America LLC SMA
SMA Solar Technology Canada Inc. SMA
SunnyBoy Inverter, product
1.8 Additional Information
For more information, please go to www.SMA-Solar.com.
Title and information content Type of information
Mounting, installation, commissioning and decommissioning Installation manual
"Application for SMAGridGuard Code" Form
"PUBLIC CYBER SECURITY - Guidelines for a Secure PV System
Communication"
Technical information
"Efficiency and Derating"
Efficiency and derating behavior of the SMA inverters
Technical Information
"Grid Support Utility Interactive Inverters"
Information about how to activate and to set the grid supporting fea-
tures according to UL1741SA
Technical Information
"Parameters and Measured Values"
Overview of all inverter operating parameters and their configura-
tion options
Technical Information
"SMA Modbus® Interface"
List with the product specific SMA Modbus registers
Technical Information
"SMAModbus® Interface"
Information on the commissioning and configuration of the SMA
Modbus interface
Technical Information
"SunSpec® Modbus® Interface"
List with the product specific SunSpec Modbus registers
Technical Information
"SunSpec® Modbus® Interface"
Information on the commissioning and configuration of the SunSpec
Modbus interface
Technical Information

2 Safety SMA Solar Technology America LLC
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2 Safety
2.1 Intended Use
The Sunny Boy is a transformerless PV inverter which converts the direct current of the PV array to
grid-compliant alternating 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 arrays (PV modules and cabling) that are approved by
the electrical standards applicable on-site and the NationalElectricalCode® ANSI/NFPA 70 or
the CanadianElectricalCode® CSA C22.1.
No galvanic isolation
The product is not equipped with a transformer and therefore has no galvanic isolation.
• Do not operate grounded PV modules together with the product. If grounded PV modules
are connected to the product, an event will occur which will appear on the product
display. The event will also be displayed, along with the associated message, in the event
list on the user interface of the product.
• Only ground the mounting frames of the PV modules.
• The neutral conductor of the AC output is not bonded to ground within the product.
• The neutral conductor of the AC output for secure power supply operation is bonded to
ground within the product.
PV modules with a high capacity to ground may only be used if their coupling capacity does not
exceed 2.5μF.
To protect the PV system against excessive reverse currents under fault conditions, a DC-side
overcurrent protective device must be connected in accordance with the National Electrical Code®
to prevent any short-circuit currents that exceed the ampacity of the DC electric circuit or the
maximum series fuse rating of the PV modules. Typically, this requires string fusing where more than
two strings are combined in parallel. Where an overcurrent protection device is required, the
National Electrical Code® requires that both positive and negative conductors have overcurrent
protection for ungrounded PV modules.
All components must remain within their permitted operating ranges and their installation
requirements at all times.
The product is approved for the US and Canadian market.
Use this product only in accordance with the information provided in the enclosed documentation
and with the locally applicable standards and directives. Any other application may cause
personal injury or property damage.
Alterations to the product, e.g. changes or modifications, are only permitted with the express written
permission of SMA. Unauthorized alterations will void guarantee and warranty claims and in most
cases terminate the operating license. SMA 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.

2 Safety
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The enclosed documentation is an integral part of this product. Keep the documentation in a
convenient place for future reference and observe all instructions contained therein.
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 on or with
the product.
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 conductors
are touched
When exposed to sunlight, the PV array generates dangerous DC voltage which is present in the
DC conductors and the live components of the inverter. Touching live DC conductors 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.
• Do not touch non-insulated parts or cables.
• Do not remove the terminal block with the connected DC conductors from the slot under
load.
• Wear suitable personal protective equipment for all work on the product.
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.
• Ensure that no voltage is present and wait five minutes before touching any parts of the PV
system or the product.

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CAUTION
Risk of burns from hot surfaces
The surface of the inverter can get very hot. Touching the surface can result in burns.
• Mount the inverter in such a way that it cannot be touched inadvertently.
• Do not touch hot surfaces.
• Wait 30 minutes for the surface to cool sufficiently.
• Observe the safety messages on the inverter.
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 then.
• Only open the product if the ambient temperature is not below 0°C (32°F).
• 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). Observe the
applicable safety regulations.
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.
• Only use listed rain-tight or liquid-tight conduit fittings to attach the conduits to the product.
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.

2 Safety
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Electrical installations (for North America)
All installations must conform with the laws, regulations, codes and standards applicable in the
jurisdiction of installation (e.g. National Electrical Code® ANSI/NFPA 70 or Canadian
Electrical Code® CSA-C22.2.).
• Before connecting the inverter to the utility grid, contact your local grid operator. The
electrical connection of the inverter must be carried out by qualified persons only.
• Ensure that the cables or conductors used for electrical connection are not damaged.

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3 Product Overview
3.1 Product Description
G
K
I
SUNNY BOY
H
J
B
E
C
SUNNY BOY
A
D
F
Figure 1: Design of the inverter
Position Designation
A Power Unit
B Enclosure lid of the Power Unit
C Enclosure lid for the Connection Unit
D Connection Unit
E Warning label with compliance information
F DC load-break switch
G 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
H Fan (only with Sunny Boy 7.0 and 7.7)

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Position Designation
I Additional type label
The additional type label must remain permanently attached to the prod-
uct. You will find the following information on the additional type label:
• 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
J Display
The display shows the current operating data and events or errors.
K LEDs
The LEDs indicate the operating state of the inverter.
3.2 Symbols on the Product
Symbol Explanation
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.
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.

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Symbol Explanation
Equipment Grounding Terminal
This symbol indicates the position for the connection of an equipment ground-
ing conductor.
UL1741 und CSA C22.2 No. 107.1 are the standards applied by Underwrit-
ers Laboratories to the product to certify that it meets the requirements of the
National Electrical Code®, the Canadian Electrical Code® and IEEE1547.
3.3 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).
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.
Class 1 wiring methods are to be used for field wiring connection to the terminals of the
communication interface.
SMA Webconnect
The inverter is equipped with a Webconnect function as standard. The Webconnect function
enables direct data transmission between the inverters of a small-scale plant and the Internet portals
SunnyPortal and SunnyPlaces without any additional communication device and for a maximum
of 4 inverters per visualized system. In large-scale PV power plants with more than 4 inverters, there
is the option of establishing data transmission between the inverters and the web-based monitoring
platform SunnyPortal and SunnyPlaces via the data logger (e.g. SMADataManager) or to
distribute the inverters over several plants. You can directly access your visualized system via the
web browser on your end device.
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.

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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
The inverter can be retrofitted with the SMA RS485 Module.
By installing the SMA RS485 Module, the inverter is able to communicate with the energy meter of
the SMARevenueGradeMeterKit.
Class 1 wiring methods are to be used for field wiring connection to the terminals of the
communication interface.
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 Cellular LTE Modem Kit
The inverter type "SBx.x-1SP-US-40" can be retrofitted with the SMA Cellular LTE Modem Kit. The
inverter type "SBx.x-1TP-US-40" is equipped with SMACellular LTE Modem Kit as standard.
The SMACellular LTE Modem Kit allows the direct data transmission between the inverter and the
internet portal SunnyPortal via the cellular network as an alternative to data transmission via
Ethernet or WLAN. In addition, the SMA Cellular LTE Modem Kit enables the communication
between the inverter and the energy meter.
The SMACellular LTE Modem Kit transmits up to four times a day a limited amount of data to
SunnyPortal. The standard term of the mobile data plan for the SMACellular LTE Modem Kit is five
years. All costs are covered within the term. No additional costs will be incurred. You have the
possibility to extend the term of the mobile data plan. For this purpose, contact SMA. By using the
SMACellular LTE Modem Kits, a local network connection is not absolutely necessary. However, it
is recommended to be able to view all information regarding the system in SunnyPortal.

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Energy meters in accordance with ANSI C12.20
The inverter type "SBx.x-1SP-US-40" can be retrofitted with the SMA Revenue Grade Meter Kit that
in accordance with ANSI C12.20 includes an energy meter. The inverter must be equipped either
with the SMA Cellular LTE Modem Kit or SMA RS485 Module to operate the SMA Revenue Grade
Meter Kit. The inverter type "SBx.x-1TP-US-40" is equipped with an energy meter as standard.
The energy meter fulfills the accuracy class 0.5 in accordance with ANSI C12.20. The energy
meter is a so called PV production meter intended to measure the generated energy of the inverter.
The measured values of the energy meter can be used for billing purposes.
Grid Management Services
The inverter is a grid support interactive inverter.
The inverter was tested in accordance with the UL1741 SA (2016-09-07) to be compliant with the
source requirements documents of the states available at the time. For connecting the inverter to the
utility grid, no additional grid monitoring equipment is necessary. A description of the tested
functions and instructions on the activation and setting of functions can be found in the technical
information "Grid Support Utility Interactive Inverters" at www.SMA-Solar.com.
PVRapidShutdownSystemEquipment
The inverter is a PVRapidShutdownSystemEquipment and performs the function of voltage
reduction according to UL 1741 CRD PV Rapid Shutdown Systems 2015. When a rapid shutdown
is triggered by disconnecting the utility grid, the inverter discharges independently on the AC side to
≤30 V within 30 seconds.
If a disconnection device is used in addition between the inverter and the PV array that disconnects
the PV array in the case of a rapid shutdown, the inverter discharges independently on the DC side
to ≤30V within 30 seconds.
The electric discharge on the DC side is deactivated by default and must be activated manually
after commissioning of the inverter via the user interface.
NOTICE - The Rapid Shutdown is tripped when opening the AC Disconnect. The AC Disconnect
must be clearly identified as Rapid Shutdown Initiator in accordance with National Electrical
Code®. The status of the Rapid Shutdown System is indicated depending on the On/Off position of
the AC Disconnect.
Parallel Operation of the DC Inputs A and B
The DC inputs A and B of the inverter can be operated in parallel and up to three strings can be
connected to it in parallel. As a result, as opposed to normal operation, up to three strings can be
connected directly to inverters with two DC inputs and up to four strings to inverters with three DC
inputs. The inverter automatically detects the parallel operation of the DC inputs A and B.
Secure power supply operation
You can connect an external outlet and a switch to the inverter in order to activate the outlet. In
case of a grid failure, the outlet supplies a load with current from the PV system. When the outlet is
activated via the switch, the load is supplied with current from the PV system. The inverter
automatically regulates the energy supply of the outlet depending on the solar irradiation on the PV
system. When the outlet is activated and a load is supplied with current from the PV system, the
inverter is disconnected from the utility grid and does not feed into the utility grid.

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If the available accessory communication set for TS4-R module technology components
(SMARooftopCommunicationKit) is installed in the inverter, the secure power supply operation is
no longer available. The Rooftop Communication Kit supports the Rapid Shutdown function. The AC
circuit breaker in the system is simultaneously the Rapid Shutdown initiator. In the event of a grid
failure or when operating the Rapid Shutdown initiator, the inverter is also disconnected from
voltage sources on the DC side. Thus the supply of the outlet for secure power supply operation
can no longer be guaranteed.
Do not connect loads that require a stable electricity supply to the outlet for
secure power supply operation
Secure power supply operation must not be used for loads that require a stable electricity
supply. The power available during secure power supply operation depends on the solar
irradiation on the PV system. Therefore, power output can fluctuate considerably depending
on the weather or may not be available at all.
• Do not connect loads to the outlet for secure power supply operation if they are
dependent on a stable electricity supply for reliable operation.
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.
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.
String-failure detection
The self-learning string failure detection identifies to which of the three inverter DC inputs the strings
are connected. The self-learning string failure detection identifies if the connected string is
inoperable and is no longer contributing to the energy yield (e.g. due to damages such as a cable
break) and monitors the input to which the defective string is connected. If the error persists, an
event will be reported at the latest one day after the detection of the defective string. This prevents
partial failures of the PV array from being undetected for a long time and which will result in yield
losses. The self-learning string failure detections automatically identifies if a string has been repaired
and resets the event. If the defective string should no longer be connected, the event must be reset
manually.
Arc-Fault Circuit Interrupter (AFCI)
In accordance with the National Electrical Code®, the inverter has a system for arc fault detection
and interruption.
An electric arc with a power of 300W or greater must be interrupted by the AFCI in the time
specified by UL 1699B. A detected electric arc causes the inverter to interrupt feed-in operation. In
order to restart feed-in operation, the feed-in operation must be activated manually. If the
installation conditions allow it, you can deactivate the arc-fault circuit interrupter.

3 Product Overview SMA Solar Technology America LLC
User ManualSBxx-US-1XP-40-BA-en-1218
3.4 LED Signals
The LEDs indicate the operating state of the inverter.
LED signal Explanation
The green LED is flashing
(twoseconds on and
twoseconds off)
Waiting for feed-in conditions
The conditions for feed-in operation are not yet met. As soon as the
conditions are met, the inverter will start feed-in operation.
The green LED is flashing:
1.5s on and 0.5s off
Secure power supply operation
The secure power supply operation is activated and the inverter sup-
plies the outlet with current from the PV system.
The green LED flashes
quickly
Update of central processing unit
The central processing unit of the inverter is being updated.
The green LED is glowing Feed-in operation
The inverter feeds in with a power of at least 90%.
The green LED is pulsing Feed-in operation
The inverter is equipped with a dynamic power display via the green
LED. Depending on the power, the green LED pulses fast or slow. If
necessary, you can switch off the dynamic power display via the
green LED.
The green LED is off The inverter is not feeding into the utility grid.
The red LED is glowing Event occurred
In addition to the glowing red LED, the display indicates the follow-
ing information about the event:
• Event type
• Event number
• Date and time at which the event occurred
The blue LED flashes slowly
for approx. one minute
Communication connection is being established
The inverter is establishing a connection to a local network or is es-
tablishing a direct connection to an end device via Ethernet (e.g.
computer, tablet PC or smartphone).
The blue LED flashes quickly
for approx. two minutes.
WPS active
The WPS function is active.
The blue LED is glowing Communication active
There is an active connection with a local network or there is a di-
rect connection with an end device via Ethernet (e.g. computer,
tablet PC or smartphone).

3 Product Overview
SMA Solar Technology America LLC
User Manual SBxx-US-1XP-40-BA-en-12 19
3.5 Display messages
Display message Explanation
Package Installed firmware version and configured country data set
Ser Product serial number
HW Hardware version of the product
FW-HP Firmware version of the central processing unit
FW-KP Firmware version of the communication processor
Ethcom A Status of the network port A
Ethcom B Status of the network port B
E-IP Ethernet IP address of the product
SMsk Subnet mask of the product
GW Gateway address of the product
DNS IP address of the domain name server
Wlancom Status of the WLAN connection
W-IP WLAN IP address of the product
DC A Status of the DC input A
DC B Status of the DC input B
DC C Status of the DC input C
AC12 Voltage / current between the line conductors L1 and L2
AC13 Voltage / current between the line conductors L1 and L3
AC23 Voltage / current between the line conductors L2 and L3
SPS-mode active The secure power supply operation is active.
P: Overload Overload at the input for secure power supply operation
Update status Firmware update information
Error An event has occurred.
P Instantaneous output power
E-Total Total produced energy
Pmax Maximum output power
cos phi Displacement power factor
Update File(s) found New firmware version available
Update progress Update is being performed

4 Operation SMA Solar Technology America LLC
User ManualSBxx-US-1XP-40-BA-en-1220
4 Operation
4.1 Establishing a connection to the user interface
4.1.1 Establishing a Direct Connection via Ethernet
Requirements:
☐ The product must be commissioned.
☐ An end device (e.g. computer) with an Ethernet interface must be available.
☐ The product must be connected directly to the end device.
☐ The respective latest version of one of the following web browsers must be installed: Chrome,
Edge, Firefox, Internet Explorer or Safari.
☐ The SMA Grid Guard code of the Installer must be available for the changing of grid-relevant
settings after completion of the first ten feed-in hours or installation assistant (see "Application
for SMAGridGuard Code" at www.SMA-Solar.com).
Procedure:
1. Tap on the enclosure lid of the Connection Unit and continue to switch up to the message E-IP:
169.254.xxx.xxx.
2. Read off the displayed IP address for the direct connection via Ethernet and either remember it
or write it down.
3. Open the web browser of your device, enter the IP address in the address line of the web
browser and press the enter key.
4. Web browser signals a security vulnerability
After the IP address has been confirmed by pressing the enter key, a message might
appear indicating that the connection to the user interface of the inverter is not secure.
SMA guarantees that calling up the user interface is secure.
• Continue loading the user interface.
☑ The login page of the user interface opens.
4.1.2 Establishing a direct connection via WLAN
Requirements:
☐ The product must be commissioned.
☐ An end device (e.g. computer, tablet PC or smartphone) must be available.
☐ The respective latest version of one of the following web browsers must be installed: Chrome,
Edge, Firefox, Internet Explorer or Safari.
☐ JavaScript must be enabled in the web browser of the end device.
☐ The SMA Grid Guard code of the Installer must be available for the changing of grid-relevant
settings after completion of the first ten feed-in hours or installation assistant (see "Application
for SMAGridGuard Code" at www.SMA-Solar.com).