Interfaces and Functions
The inverter can be equipped or retrofitted with the following interfaces and functions:
BLUETOOTH
The inverter is equipped with BLUETOOTH as a standard feature depending on the date of manufacture. Via BLUETOOTH, the inverter can communicate with various BLUETOOTH devices (for information on supported SMA products, see www.SMA-Solar.com).
SMA Speedwire/Webconnect
The inverter is equipped with SMA Speedwire/Webconnect as standard. SMA Speedwire/Webconnect is a type of communication based on the Ethernet standard. This enables inverter-optimized 10/100 Mbit data transmission between Speedwire devices in PV systems and the software Sunny Explorer. The Webconnect function enables direct data transmission between the inverters of a small-scale system and the Internet portal Sunny Portal without any additional communication device and for a maximum of 4 inverters per Sunny Portal system. In large-scale PV power plants, data transmission to the Internet portal Sunny Portal is carried out via the SMA Cluster Controller. You can access your Sunny Portal 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:
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Remote query of measured values
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Remote setting of operating parameters
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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 SMA products at www.SMA-Solar.com).
The SMA Power Control Module 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 SMA Power Control Module).
The RS485 interface and the SMA Power Control Module can be retrofitted and may not be operated in parallel.
If you want to operate the RS485 interface or the SMA Power Control Module in parallel with the multifunction relay in the inverter, you must ensure that a voltage of no more than 30 V DC or 25 V AC 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.
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.
Error message required by standard
In some countries, signaling of errors is required by standards, e.g. IEC 62109-2. In order to meet the standard requirement, take one of the following measures:
- Operate the multifunction relay in the operating mode Fault indication or FltInd and connect a display unit to the multifunction relay that signals an error or the undisturbed operation of the inverter.
- Activate the error alarm in Sunny Portal (for information on receiving error alarms via Sunny Portal, see the Sunny Portal user manual at www.SunnyPortal.com). This requires the inverter to be registered in Sunny Portal.
SMA OptiTrac Global Peak
SMA OptiTrac Global Peak is an advancement of SMA OptiTrac and allows the operating point of the inverter to follow the optimal operating point of the PV array (MPP) precisely at all times. In addition, with the aid of SMA OptiTrac Global Peak, the inverter detects several maximum power points in the available operating range, such as may occur particularly with partially shaded strings. SMA OptiTrac Global Peak is enabled by default.
All-pole sensitive residual-current monitoring unit
The all-pole sensitive residual-current monitoring unit detects alternating and direct differential currents. In single-phase and three-phase inverters, the integrated differential current sensor detects the current difference between the neutral conductor and the line conductor(s). If the current difference increases suddenly, the inverter disconnects from the utility grid.