De-energisation (Shutdown) Procedure

De-energise the system before servicing.

To safely de-energise the AES cabinet system and associated inverter, follow the steps below in order:

1. Activate Emergency Stop (E-Stop) on the Inverter

   • This immediately turns off the inverter functions and stops charging/discharging operations.

2. Activate the Emergency Stop (E-Stop) button on the AES Battery Cabinet

   • This isolates the battery internally by opening the HV contactors.

3. Open the PV Isolator

   • Disconnect the DC input from the solar array to the inverter.

4. Open All AC Isolators

   • Shut off all AC power sources connected to the system.

   • Open the grid, load, and disconnect any generator AC to isolate the inverter from external power.

   • To disconnect power to the UPS and internal systems, turn off the cabinet auxiliary AC input by opening the HV Box AC breaker.

5. Open the DC Isolator on the Cabinet’s HV Box

   • Confirm the AES Cabinet’s DC isolator is in the open position (OFF).

6. Open the Inverter’s DC Breakers

   • Disconnect the DC input from the battery to the inverter.

7. Switch Off the Cabinet UPS (Auxiliary Power)

   • Rotate the UPS switch inside the cabinet to the left to cut power to the Battery Control Unit (BCU) and LYNK II. This is important as leaving it on will result in dead UPS batteries and make a black start impossible until the batteries are charged.

8. Verify Complete Shutdown

   • Confirm that all equipment is powered down.

   • Check that no LEDs are illuminated, no fans or pumps are running, and no indicators are active on the inverter, cabinet, LYNK, or internal systems.