3 starting the system, 4 testing the battery current sensor – SMA Off-Grid Systems User Manual
Page 40
7 Commissioning
SMA Solar Technology AG
40
Off-Grid-IS-en-30
Installation - Quick Reference Guide
7.3 Starting the System
Requirement:
☐ All Sunny Island inverters must be switched on.
☐ The circuit breakers for the AC sources in the stand-alone grid must be switched off in the AC distribution board.
☐ The load-break switch of the generator must be open.
☐ The circuit breakers for the charge controllers must be switched off in the DC distribution board.
Procedure:
• Press the start-stop button on a Sunny Island and hold it until you
hear an acoustic signal.
or
Press and hold the button on the Sunny Remote Control until you hear an acoustic signal.
☑ The system starts and the inverter LED on each Sunny Island inverter glows green.
7.4 Testing the Battery Current Sensor
If a charge controller from a third-party supplier, a DC load, or more than four Sunny Island Charger charge controllers
are installed in the off-grid system, an additional battery current sensor must be installed (see the Sunny Island installation
manual).
Requirements:
☐ The Sunny Island must be in operation (see Section 7.3 "Starting the System", page 40).
Procedure:
1. Switch on a load (e.g., a 1 kW radiant heater) and all associated protective devices in the AC distribution board.
2. Measure the battery current with a current clamp.
3. Switch to installer mode on the Sunny Remote Control (see Section 7.1, page 39).
4. Select the 120.06 TotBatCur parameter and read off the value.
☑ The value is positive and is within the measuring tolerance range.
✖ Is the value not positive or is it outside the measuring tolerance range?
The value is negative because the poles of the measuring cable for the battery current sensor are reversed.
• Install the battery current sensor correctly (see the Sunny Island inverter installation manual).
The value is not within the measuring tolerance range since the incorrect battery current sensor type has been set.
• Set the correct battery current sensor type (see the Sunny Island inverter installation manual).