SMA SI 4548-US - Manual (Page 150)

17 PV Inverters SMA America, LLC
150 SI4548-6048-US-BE-en-20 Operating Manual
17.2 Setting the Off-Grid Parameters
Controlled battery charging is needed in an off-grid configuration. Therefore Sunny Boy inverters can
reduce their feed-in power. This task is performed by an implemented "Frequency Shift Power Control"
system (see Section 17.5 "Frequency-Shift Power Control (FSPC)", page 153).
To activate this function, you must first pre-configure the Sunny Boy via programming.
17.3 Configuration of the PV Inverters with a Communication
Products
PV Inverters with RS485
You can configure PV inverters with RS485 using the following communication products:
• Sunny WebBox
• Sunny Boy Control
• Computer with Sunny Data/Sunny Data Control software
For PV inverters without RS485 Piggy-Back or RS485 data module, you will also need a service cable
for data transmission (USB Service Interface, SMA order number: USBPBS).
PV Inverters with Speedwire
You can configure PV inverters with Speedwire using the following communication products:
• Sunny Explorer
• SMA Cluster Controller
Danger to life from back-feed into the utility grid in the event of grid failure
Once you set the Sunny Boy to stand-alone grid parameters, the device no longer complies with
IEEE 929 and the IEEE 1547.
• Observe the locally applicable regulations.
• Consult the responsible power company.
SMA Grid Guard code required to change grid-relevant parameters
To change grid-relevant parameters in the PV inverter after more than ten operating hours, you
will need the SMA Grid Guard code.
• Install a communication product corresponding to the type of communication and the PV
inverter used.
• Apply for an SMA Grid Guard code to change grid-relevant parameters (for an
application for the SMA Grid Guard code, see the Certificate "Application for SMA Grid
Guard Code" at www.SMA-America.com).