SMA SI 4548-US - Manual (Page 72)

8 Commissioning SMA America, LLC
72 SI4548-6048-US-BE-en-20 Operating Manual
8.3 Commissioning the battery current sensor
In the event you have installed a battery current sensor in your system, you are required to synchronize
the internal offset of the device. To do this, proceed as follows:
1. Set the Sunny Island to standby mode (see Section 9.2 "Stopping the Sunny Island (Standby)",
page 75).
2. Short-circuit the battery current sensor conductors.
– BatCur+ to terminal 1
– BatCur– to terminal 1
3. Enter the installer password (see Section 10.5 "Entering the Installer Password", page 87).
4. Set the following parameters:
Choose the type of battery current sensor:
– "225.01 BatCurSnsTyp" (None/50 mV/60 mV). Only after activation of the parameter
with 50 mV or 60 mV, other parameters (02, 03 and 04 in the menu "225# Battery Current
Sensor") will be shown and activated.
5. Set the nominal current of the battery current sensor (e.g. 400 A/60 mV):
– "225.02 BatCurGain60": (for a 60 mV output)
– "225.03 BatCurGain50": (for a 50 mV output)
6. Start automatic calibration:
– Set "225.04 BatCurAutoCal" to "Start".
☑ The Sunny Island conducts an automatic calibration.
7. Check the offset error:
Display value "120.06 TotBatCur" should be (close to) zero.
8. Reconnect the conductors of the battery current sensor correctly as displayed in the graphic.
Entering incorrect parameters endangers operational safety. Damage to the off-grid
system and its components
All parameter settings which could affect the operating safety of the off-grid system are protected
by the installer password.
• Only trained electrically qualified persons are permitted to set and adjust system parameters.