Initial Start-up
SMA America, LLC
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SI5048U-TUS121440
Technical Description
8.3 Connecting the Battery Current Sensor
If you have installed a battery current sensor in your system you must calibrate the device's internal
offset. To do this, proceed as follows:
1. Put the Sunny Island in standby, as described in section 9.2 ”Stopping (Standby)” (page 73).
2. Short-circuit the battery current sensor cables.
– to terminal 1
– BatCur– to terminal 1
3. 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.
4. Set the nominal current for 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).
5. Automatic calibration of the electronics (at start-up).
– set ”225.04 BatCurAutoCal” to ”Start”
☑ The Sunny Island conducts an automatic calibration.
NOTICE!
Entering incorrect parameters endangers operational safety. Damage to the off‑grid system
and its components.
All parameters which could affect the operating safety of the off-grid power system are
protected by the installer password.
• Only qualified personnel are permitted to set and adjust system parameters.
• Enter the password as described in section 10.5 ”Entering the Installer Password”
(page 85).
