SMA SUNNY BOY STORAGE 3.7-10 User manual

SBSx.x-10-CAN-SG-en-10 | Version 1.0ENGLISH
Service Manual for Installers
Functional test of the CAN interface
SUNNY BOY STORAGE 3.7-10 / 5.0-10 / 6.0-10

Table of Contents SMA Solar Technology AG
Service Manual for InstallersSBSx.x-10-CAN-SG-en-102
Table of Contents
1 Information on this Document..................................................................................................... 3
1.1 Validity ............................................................................................................................................................. 3
1.2 Target Group ................................................................................................................................................... 3
1.3 Content and Structure of this Document......................................................................................................... 3
2 IMPORTANT SAFETY INSTRUCTIONS........................................................................................ 4
3 Background Information ............................................................................................................. 7
4 CAN bus functional test ............................................................................................................... 8
4.1 Assembling the test cable................................................................................................................................ 8
4.2 Performing the functional test.......................................................................................................................... 8
5 Contact .......................................................................................................................................... 11

1 Information on this Document
SMA Solar Technology AG
Service Manual for Installers 3SBSx.x-10-CAN-SG-en-10
1 Information on this Document
1.1 Validity
This document is valid for:
• SBS3.7-10 (SunnyBoyStorage 3.7)
• SBS5.0-10 (SunnyBoyStorage 5.0)
• SBS6.0-10 (SunnyBoyStorage 6.0)
1.2 Target Group
The tasks described in this document must only be performed by qualified persons. Qualified persons must have the
following skills:
• Knowledge of how to safely disconnect SMA inverters
• Knowledge of how batteries work and are operated
• Training in how to deal with the dangers and risks associated with installing, repairing and using electrical
devices, batteries 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
• Knowledge of and compliance with the documents of the battery manufacturer with all safety information
1.3 Content and Structure of this Document
This document describes how to check the battery communication interface.
This document supplements the documents that are enclosed with each product and does not replace any locally
applicable codes or standards. Read and observe all documents supplied with the product.
Illustrations in this document are reduced to the essential information and may deviate from the real product.

2 IMPORTANT SAFETY INSTRUCTIONS SMA Solar Technology AG
Service Manual for InstallersSBSx.x-10-CAN-SG-en-104
2 IMPORTANT SAFETY INSTRUCTIONS
Keep the manual for future reference.
This section contains safety information that must be observed at all times when working.
DANGER
Danger to life due to electric shock when live components or cables of the inverter are touched
High voltages are present in the conductive components or cables of the inverter. Touching live parts and cables of
the inverter results in death or lethal injuries due to electric shock.
• Disconnect the product and battery from voltage sources and make sure it cannot be reconnected before
working on the device.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch non-insulated parts or cables.
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 and the battery are integrated into the existing surge protection.
• When laying the network cables or other data cables outdoors, it must be ensured that a suitable surge
protection device is provided at the transition point of the cable from the product or the battery outdoors to the
inside of a 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 or 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.
• Disconnect the battery from the product via an external disconnection device.
• 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).

2 IMPORTANT SAFETY INSTRUCTIONS
SMA Solar Technology AG
Service Manual for Installers 5SBSx.x-10-CAN-SG-en-10
WARNING
Danger to life due to fire or explosion when batteries are fully discharged
A fire may occur due to incorrect charging of fully discharged batteries. This can result in death or serious injury.
• Before commissioning the system, verify that the battery is not fully discharged.
• Do not commission the system if the battery is fully discharged.
• If the battery is fully discharged, contact the battery manufacturer for further proceedings.
• Only charge fully discharged batteries as instructed by the battery manufacturer.
WARNING
Danger to life due to burns caused by electric arcs through short-circuit currents
Short-circuit currents in the battery can cause heat build-up and electric arcs. Heat build-up and electric arcs may
result in lethal injuries due to burns.
• Disconnect the battery from all voltages sources prior to performing any work on the battery.
• Observe all safety information of the battery manufacturer.
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 600 V or higher.
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.
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.

2 IMPORTANT SAFETY INSTRUCTIONS SMA Solar Technology AG
Service Manual for InstallersSBSx.x-10-CAN-SG-en-106
NOTICE
Damage to the enclosure seal in subfreezing conditions
If you open the product or disconnect the PowerUnit and ConnectionUnit 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 0°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).
• Do not disassemble the PowerUnit and ConnectionUnit unless the ambient temperature is at least 0°C and
conditions are frost-free.
• Do not disassemble the PowerUnit unless the ambient temperature is at least 0°C and conditions are frost-free.

3 Background Information
SMA Solar Technology AG
Service Manual for Installers 7SBSx.x-10-CAN-SG-en-10
3 Background Information
Sometimes, during commissioning of the Sunny Boy Storage, the CAN interface of the Sunny Boy Storage fails to
detect the connected batteries or the backup box (depending on the system configuration).
Possible causes:
• The termination of the communication cable between the battery and inverter is faulty.
• The cabling between battery and inverter is not correct.
• The communication cable used to connect the CAN interfaces on the battery interface module in the inverter with
the battery is not suitable (see requirements in the manual of the inverter).
• The inverter has not been grounded correctly.
• The software version of the inverter is not up to date.
• There is a defect in the inverter.
The functional test described here was developed to exclude a defect of the CAN interface on the battery interface
(BIM) of the Sunny Boy Storage.
The function test does not require a connection between the inverter and the battery.
The only purpose of the function test is to exclude a device defect at the Sunny Boy Storage with
reasonable certainty. It does not constitute a full check of the CAN bus.

4 CAN bus functional test SMA Solar Technology AG
Service Manual for InstallersSBSx.x-10-CAN-SG-en-108
4 CAN bus functional test
4.1 Assembling the test cable
SMA recommends creating a test cable from new components, as described below.
For one-time use, the plugs already present at the inverter and the existing communication cable can be used.
Required materials
☐ One battery communication cable for the communication between inverter and battery
The CAN communication cable has to fulfill the requirements described in the operating manual of the inverter.
☐ Two 6-pole terminal blocks
Assignment of the terminal block
Terminal block Position Assignment
ABC
D E F
A Not assigned
B Not assigned
C GND
D CAN L
E CAN H
F Not assigned
Procedure:
• On both terminal blocks, wire position CAN L (green), Can H
(white) and GND (orange). CAN L and CAN H have to consist
of a wire pair (see the inverter manual).
4.2 Performing the functional test
Prior to performing any work on the inverter, always disconnect the inverter from voltage sources as
described in the inverter manual. Always adhere to the prescribed sequence.
Procedure:
1. Disconnect and isolate the inverter from the AC and DC power (see inverter manual).
2. Remove the black cover of the inverter.
3. Remove all terminal blocks from inputs BAT1, BAT2, BAT3 and BAT4.

4 CAN bus functional test
SMA Solar Technology AG
Service Manual for Installers 9SBSx.x-10-CAN-SG-en-10
4. Check battery interfaces BAT1 and BAT2:
• Connect inputs BAT1 and BAT2 on the battery interface
module with the pre-assembled test cable.
• Close the cover of the inverter.
• Switch on the AC fuse.
• Log in to the interface of the inverter as Installer.
• Check the firmware version and update if necessary. The product must have at least firmware version
3.11.49.R.
You can find information on the firmware version at the bottom left in the status bar of the user interface of the
inverter. You can find the current firmware versions at https://www.sma.de/service/downloads.html. Please
read the accompanying Readme files before updating.
• In the Device parameters menu, at Edit parameters,
select the Battery. At Operation > CAN test mode, enter
the value 12.
• Confirm the entry with Save all.
• To check the result, open the Events menu:
☑ If CAN interfaces BAT1 and BAT2 are fault free, the Events menu shows success rate: 100
Because the communication cable to the battery has been removed for the functional test, the list of events
might show various error messages relating to battery communication, although the CAN interface is working
perfectly.
☑ The check for battery interfaces BAT1 and BAT2 is complete.
5. Disconnect the inverter from voltage sources (see inverter manual).

4 CAN bus functional test SMA Solar Technology AG
Service Manual for InstallersSBSx.x-10-CAN-SG-en-1010
6. Remove the cover of the inverter and remove the test cable from battery interfaces BAT1 and BAT2.
7. Check battery interfaces BAT3 and BAT4:
• Now use the test cable to connect BAT3 and BAT4 on the battery interface module.
• Close the cover of the inverter.
• Switch on the AC fuse.
• Log in to the interface of the inverter as Installer.
• In the Device parameters menu, at Edit parameters,
select Battery. Under Operation > Can test mode, enter
34 as value and confirm with Save all.
☑ If the CAN interfaces BAT3 and BAT4 are fault free, the
Events menu shows success rate: 100.
Because the communication cable to the battery has been
removed for the functional test, the list of events might show
various error messages relating to battery communication,
although the CAN interface is working perfectly.
☑ The CAN interface check is complete. No further settings are required.
8. Disconnect the inverter from the voltage sources again (see inverter manual).
9. Remove the cover of the inverter and remove the test cable from battery interfaces BAT3 and BAT4.
10. Insert the terminal blocks with the communication cable to the
battery or backup box into the respective BATx input again.
BAT1 BAT2 BAT3
11. Use the AC circuit breaker to switch on the inverter.
12. Switch on the battery or the load-break switch of the battery (see documentation of the battery manufacturer).
13. Log in to the interface of the inverter as Installer.
14. At the top right of the user interface, click on the symbol.
15. In the drop-down menu, select the option Starting the Installation Assistant and follow the instructions of the
installation assistant.
☑ After the installation assistant has been completed successfully, the configured system is available again and is
ready for operation.
If the communication error persists, the inverter can be excluded as cause. The origin of the communication error is in a
different area of the installation.
Detecting a defective CAN input
• If, when CAN interfaces BAT1/BAT2 or BAT3/BAT4 are being tested and the value mentioned above has been
entered and confirmed, the Events menu shows "success rate: 0" instead of 100, one of the CAN inputs are
defective.
In the event of a defective CAN input, a service request has to be submitted and the battery interface
module has to be replaced.

5 Contact
SMA Solar Technology AG
Service Manual for Installers 11SBSx.x-10-CAN-SG-en-10
5 Contact
https://go.sma.de/service

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