User Manual
59
Commissioning and maintenance
5.1 System start and stop
5.1.1 Start up procedures
1. Rotate the switch handles of the Master & Sub-
Master BMS to the "ON" position.
2. The system starts successfully when the
indicator light shows a steady green light.
1. Stop the inverter.
When turning off the inverter, please follow the steps below:
1) Shut down the inverter through the APP or the button on the display first.
2) Disconnect the breakers on the grid and load side.
3) Turn off the battery switch, and disconnect the DC breaker on the battery side (if any).
4) Wait 30 seconds and then turn the inverter DC switch to the “OFF” position. At this time, there is remaining
power in the inverter capacitor. Wait for 10 minutes until the inverter is completely de-energized before operating.
5) Disconnect the AC and DC cables.
2. Rotate the switch handle of the Master BMS and Sub-Master BMS to the "OFF" position one by one in multi-rack
cabinets.
5.1.2 Shut down procedures
5.1.3 Emergency stop function
Wattsonic WTS 25-50K hybrid inverter comes
standard with a fast stop function, and you can
use this function by connecting an external switch
to the Emergency stop interface if required in the
installation place. The external controller is not in
our accessory box.
F
ast stop
+
(11)
F
ast stop-
(12)
12
Emergency stop button
Inverter fast stop circuit
Warning:
Please don't try to switch off Master BMS during regular charge and discharge, which has high risk
to damage BMS inside core components.
