Install Manual

8 ESS startup procedure

CAUTION! Powering the ESS requires a specific start-up procedure.

Please follow the steps below.

CAUTION! If the battery disconnect has been placed in the OFF

position at any time during operation, wait one minute before

returning to the ON position. Rapid cycling (less than one minute)

of the battery disconnect can cause damage to the pre-charge

circuit.

CAUTION! During the first start-up sequence after installation,

the battery modules may require a battery maintenance cycle to

balance the SOC. This maintenance cycle requires a grid

connection so that the PCS can be commanded to charge the

batteries. The PCS battery SOC alarm light will flash yellow if

maintenance and/or other battery faults are present. This

procedure may take from a few minutes to a few hours, depending

on the difference in battery module SOC.

Refer to the BMS face plate in figure 15 that applies to the battery model

supplied with the system.

1. Turn ON the BMS power switch to all battery modules in the

cabinet.

2. Press and hold the Start button on the master battery module for

0.5 seconds. The master battery is the lower-front module in the

battery cabinet. Wait for the battery module to initialize to the

normal/idle state. See also figure 10, module position 1 for

reference.

3. Turn ON the battery disconnect.

4. Turn ON the AC source disconnect and/or breaker at the electrical

panel.

8.1 System operation

The ESS is fully automated. The EMS will be programmed to

connect the system to the grid after AC and DC sources are

applied. The operating states can also be viewed on the PCS

display panel. For more details on system operation, refer to the

Owner’s Manual.

EMS

US3000C

Figure 19: ESS startup procedure.