Interfaces and Functions
The inverter can be equipped or retrofitted with the following interfaces and functions:
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.
Class 1 wiring methods are to be used for field wiring connection to the terminals of the communication interface.
RS485 Interface
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 RS485 interface can be retrofitted and can be used in place of the SMA Speedwire/Webconnect interface in the inverter.
Class 1 wiring methods are to be used for field wiring connection to the terminals of the communication interface.
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( > Activating of the Rapid Shutdown DC discharge function).
NOTICE - The inverter's Rapid Shutdown function is initiated by disconnecting the inverter from the AC grid voltage, for example, by opening the main PV system AC disconnect. The AC disconnect that serves as the Rapid Shutdown initiation device must be readily accessible and clearly marked in accordance with National Electrical Code®. The Rapid Shutdown status of the PV system will be indicated by the On/Off (Closed/Open) position of this AC disconnect. The Off (Open) position indicates that Rapid Shutdown has been initiated.
SMA ShadeFix
The inverter is equipped with the shade management system SMA ShadeFix. SMA ShadeFix uses an intelligent MPP tracking system to determine the operating point with the highest output during shading conditions. With SMA ShadeFix, inverters use the best possible energy supply from the PV modules at all times to increase yields in shaded systems. SMA ShadeFix can be activated via operating parameters. The time interval of SMA ShadeFix is usually six minutes. This means that the inverter determines the optimum operating point every six minutes. Depending on the PV system or shading situation, it may be useful to adjust the time interval.
Arc-Fault Circuit Interrupter (AFCI)
In accordance with the National Electrical Code®, the inverter has a system for DC arc fault detection and interruption. The arc-fault circuit interrupter is listed in accordance with UL 1699B Ed. 1. 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.
Q on Demand 24/7
The inverter can supply reactive power by means of Q on Demand 24/7 covering the entire unit circle around the clock.
Integrated Plant Control
The inverter can display the Q(V) characteristic curve specified by the grid operator by means of Integrated Plant Control without measuring on the grid-connection point. The inverter can automatically compensate equipment installed between the inverter and the grid-connection point after having activated the function (for information on the system configuration refer to the Technical Information "Integrated Plant Control" at www.SMA-Solar.com).