SMA Sunny Boy 6000US - Automatic Grid Voltage Detection

SMA Solar Technology AG
22 SB50US-80US-IUS094030 Installation Guide
If the Sunny Boy is configured for the incorrect
transformer voltage, (e.g. the inverter is configured for
240V and then connected to a 208V grid), the Sunny
Boy will display the following error message:
If this error message is encountered, recheck the input voltage configuration and confirm that it is set
properly.
Automatic Grid Voltage Detection
The Sunny Boy’s software is designed to automatically detect which grid voltage it is feeding.
Depending upon the voltage and phase angle between L1-N and L2-N, the inverter will determine if
it is connected to a 208 V, 240 V or 277 V grid. If the Sunny Boy is configured for the incorrect
transformer voltage, (e.g. the inverter is configured for 240 V and then connected to a 208 V grid),
the Sunny Boy will display an error message.
The table below lists the voltage and frequency limits for the AC connection.
If the utility system has a neutral, the local Authority Having Jurisdiction (AHJ) may require that the
neutral be connected to the inverter. Follow the procedure in 3.4"Utility Configuration Jumpers"
(page24) to set the configuration jumpers and chapter 5.5.2"AC Wiring Without SMA DC-
Disconnect" (page47) to connect a neutral conductor to the Sunny Boy.
Voltage Range for 208 V nominal, line to line
(except Sunny Boy 8000US)
183 V - 229 V
Voltage Range for 240 V nominal, line to line 211 V - 264 V
Voltage Range for 277 V nominal, line to neutral 244 V - 305 V
Frequency Range 59.3 Hz - 60.5 Hz