Sunny Boy User Manual
4 Operation
SMA Solar Technology AG
User Manual SBxx-US-1XP-41-BA-en-11 43
Data security during enabled Modbus interface
If you enable the Modbus interface, there is a risk that unauthorized users may access and
manipulate the data or devices in your PV system.
To ensure data security, take appropriate protective measures such as:
• Set up a firewall.
• Close unnecessary network ports.
• Only enable remote access via VPN tunnel.
• Do not set up port forwarding at the communication port in use.
• In order to disable the Modbus interface, reset the inverter to the default settings or
disable the parameter again.
Procedure:
• Activate the Modbus interface and adjust the communication ports if necessary (see the
technical information "SMA and SunSpec Modbus® Interface" at www.SMA-Solar.com).
4.18 Setting SMA ShadeFix
You can set the time interval in which the inverter has to determine the optimum operating point. If
you do not want to use SMA ShadeFix, you can disable the feature.
The basic procedure for changing operating parameters is explained in another section (see
Section4.13 "Changing Operating Parameters", page38).
Procedure:
• In the parameter group DC-side > DC settings > SMA ShadeFix, set the parameter Time
interval of SMA ShadeFix and set the required time interval. The ideal time interval is
usually six minutes. This value should only be increased if the shading situation changes
extremely slowly.
☑ The inverter optimizes the MPP of the PV system at the predetermined time interval.
• In order to disable the SMAShadeFix feature, in the parameter group DC-side > DC settings
> SMA ShadeFix, set the parameter SMA ShadeFix switched on to Off.
4.19 Deactivating the Arc-Fault Circuit Interrupter (AFCI)
The basic procedure for changing operating parameters is explained in another section (see
Section4.13 "Changing Operating Parameters", page38).
Procedure:
• Select the parameter AFCI switched on or AfciIsOn and set to No.