APU - Auxiliary power unit (alternate term for ESS)
ATS - Automatic transfer switch is used to transfer between AC power sources, usually grid, or generator.
BMU - Battery management unit
BUS - Refers to the common connection point for power connections
CAN - Controller area network
CMU - Cell management unit that is embedded in the power cell.
DC - Direct current
DG - Diesel generator
EBMS - Energy battery management system
EMS - Emergency module stop
ESS - Energy storage system
FET - Field-effect transistor
FST - Field service tool - user interface to monitor ESS and adjust parameters
HB - Heartbeat, that relates to the heartbeat LED lights on the PC boards
HKPS - Housekeeping power supply for the LED lights on the PC boards.
LED - Light emitting diode
LIN - Local interconnect network, ribbon cable that provides a connection between the EBMS and each cell in an energy module.
NCL - Non-critical Load
NOC - Network operations center
NRG - Energy PCB connected to the system bus, used to reduce voltage fluctuation during transitions from charge to discharge.
OTAC - Over the air command - used to read and write firmware parameters from a remote location
PBMS - Power battery management system
PCB - Printed circuit board
PIT - Power and interface termination, used inside cell to connect and disconnect electrodes.
SIM - Subscriber identity module
VDC - Volts direct current
VRLA - Valve Regulated Lead Acid
WO - Work order