by Green Cubes

Lithium Ion Battery Modules GBU Series

Product Information

The Guardian Battery Unit (GBU) Series from Green Cubes Technology is a family of 48V 19” and 23″ rack-mountable Lithium-ion Battery Backup Units (BBU) designed to be used in conjunction with the Aspiro and Guardian DC Power Systems.

The GBU Series has been designed for data center and telecom applications as a replacement to Lead Acid batteries.

The patented Energy Balance Technology (EBT) provides internal balancing among the GBU modules connected in parallel. The EBT ensures consistent voltage and current delivery from the entire system of connected modules, which maximizes run-time and power delivery.

Remote management via the Ethernet using the UNIPOWER GCC Controller with PowCom™ software provides immediate access to performance and alarm information.

Lithium Iron Phosphate chemistry provides superior power delivery, as well as the longest cycle and calendar life.

Features and Options
  • • 19-Inch or 23-Inch Rack Mounting
  • • Current Capacity: 100A
  • • Operating Voltage: 48VDC
  • • Scalable connect multiple units in Parallel
  • • RS-485 Communication Ports
Lithium-Ion Chemistry See Model Table
Nominal Voltage 48V
Voltage Range GBU2U: 42-54.6V
GBU3U: 42.7-54.8V
GBU4U: 42.7-54.8V
Nominal Capacity See Model Table
Continuous Discharge Current 100A
Pulse Discharge Current 115A for 300ms
Quiescent Current Draw 1mA
Maximum Input/Charge Voltage 58V
Min/Max Charge Current Range 3 - 100A
Cell Balancing 300mA
Maximum in Parallel Operation 16
Terminals Four threaded receptacles, M6 bolt pattern
Dimensions, inches (mm) GBU2U: 21.4 (544) W x 29 (737) D x 3.4 (86) H
GBU3U: 17.3 (440) W x 22 (558.8) D x 5.1 (130.5) H
GBU4U: 17.3 (440) W x 22 (558.8) D x 6.8 (173) H
Weight GBU2U: 63kg (139 lbs)
GBU3U: 50kg (110 lbs)
GBU4U: 70kg (154 lbs)
Serial Communications ModBus over RS485


Operating Humidity 5% to 95% Non-condensing
Charge Temperature Range GBU2U: -5°C to +45°C
GBU3U: 0°C to +55°C
GBU4U: 0°C to +45°C
Discharge Temperature Range

GBU3U: -20°C to +55°C
GBU4U: -5°C to +50°C

Thermal Management Variable Speed Fan
Airflow Direction GBU2U: Front to Back
GBU3U: Back to Front
GBU4U: Back to Front
IP Rating IP20
Agency Approvals *

GBU2U: UN 38.3, IEC 62619, UL 1973
GBU3U: UN 38.3, UL 1973, IEC 62368
GBU4U: UN 38.3, UL 1973, IEC 62368

Radiated and Conducted Emission EN55032 / CISPR 22 Class A
Calendar Life @ 80% SOC Up to 20 Years
Cycle Life @ 80% SOC GBU2U: 800 Cycles
GBU3U: 3500 Cycles
GBU4U: 4000 Cycles
Battery Modes Ship and Active
Shipping Classification Class 9
* UL & IEC pending
Model Number Capacity Rack Mounting Chemistry
GBU2U 175Ah 2RU 23" Lithium Nickel Manganese Cobalt (NMC)
GBU3U 105Ah 3RU 19" Lithium Iron Phosphate
GBU4U 160Ah 4RU 19" Lithium Iron Phosphate