Automatic Grid Voltage Detection - SMA SUNNY BOY 5000-US Installation Manual

AC Voltage Configuration
Tightening torque of the screw terminals for the left terminal block:
Gray terminal blocks (Weidmüller)
Green terminal blocks (Phoenix)
Do not remove the cable in the left terminal block with the marking 0 V (B).
This always remains connected to the right side of the left terminal block.
4. Connect and fasten all cables not being used to the right terminal block (C). Tightening torques
of the screw terminals for the right terminal block (cables not being used):
Gray terminal blocks (Weidmüller)
Green terminal blocks (Phoenix)
If the Sunny Boy is configured for the wrong
input voltage, this error message appears in
the display:
• Check if the configuration of the AC voltage is correct.

Automatic Grid Voltage Detection

The Sunny Boy automatically detects the grid voltage that it must feed in. Depending on the voltage
and the phase angle between L1‑N and L2‑N, the inverter determines whether it is connected to a
208 V, 240 V, or 277 V grid. If the Sunny Boy is configured for the wrong grid voltage (for example,
the inverter was configured for 240 V and then connected to a 208 V grid), the Sunny Boy displays
an error message.
The table below contains the limiting values for voltage and frequency in the AC terminal:
Voltage range for 208 V nominal value, phase-phase (not Sunny
Boy 8000-US)
Voltage range for 240 V nominal value, phase-phase
Voltage range for 277 V nominal value, phase-neutral conductor
Frequency range
If the power distribution grid uses a neutral conductor, the responsible authority can demand that a
neutral conductor be connected to the inverter.
To set the configuration jumpers, observe the procedure in 4.4 "Jumper for System Configuration"
(page 22).
To connect a neutral conductor to the Sunny Boy, observe section 6.5.2 "AC Connection in the DC
Disconnect" (page 42) or section "AC Connection in the DC Disconnect" on page 42.
Configuration of Grid Voltage
The figure on the next page illustrates common grid forms. Note that it is not the phase relationship
that is important when connecting the Sunny Boy to the power distribution grid, but the voltage
compatibility.
20 SB50US-80US-IA-en-36
18 in-lb. (2 Nm)
22 in-lb. (2.5 Nm)
11 in-lb. (1.2 Nm)
15 in-lb. (1.7 Nm)
Disturbance
XFMR
183 V ... 229 V
211 V ... 264 V
244 V ... 305 V
59.3 Hz ... 60.5 Hz
SMA America, LLC
Installation Manual