communication device and for a maximum of 4 inverters per SunnyPortal system. In large-scale PV
power plants, data transmission to the Internet portal SunnyPortal is carried out via the
SMAClusterController. You can access your SunnyPortal system from any computer with an
Internet connection.
Webconnect enables - for PV systems operated in Italy - the connection or disconnection of the
inverter to or from the utility grid and the specifying of the frequency limits to be used via
IEC61850-GOOSE messages.
Modbus
The inverter 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 devices is designed for industrial use and has the
following tasks:
• Remote query of measured values
• Remote setting of operating parameters
• Setpoint specifications for system control
RS485 interface or SMA Power Control Module
The inverter can communicate via cables with special SMA communication products via the RS485
interface (information on supported SMAproducts at www.SMA-Solar.com).
The SMAPowerControlModule enables the inverter to implement grid management services and
is equipped with an additional multifunction relay (for information on installation and configuration,
see the installation manual of the SMAPowerControlModule).
The RS485 interface and the SMAPowerControlModule can be retrofitted and may not be
operated in parallel.
If you want to operate the RS485 interface or the SMAPowerControlModule in parallel with the
multifunction relay in the inverter, you must ensure that a voltage of no more than 30VDC or
25VAC is connected to the multifunction relay.
Grid Management Services
The inverter is equipped with service functions for grid management.
Depending on the requirements of the grid operator, you can activate and configure the functions
(e.g. active power limitation) via operating parameters.
4Product Description
SMA Solar Technology AG
Operating ManualSTP5-12TL-20-BE-en-1518
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