Century Yuasa Batteries Factory BESS

The right hybrid power systems can reduce expenses and improve environmental standings, but only if done right.


Century Yuasa Batteries (CYB) are expanding our DC Power system capabilities into the industrial Battery Energy Storage market (BESS). To demonstrate our competancy in this field, where else would be better to trial this technology than here at the head office and factory in Queensland.

The initial goal is to develop and install a working BESS system at the CYB factory. This will be a live and operational system designed to;

  • reduce the peak factory energy consumption profile and hence reduce our electricity bill. It will also be used as a demonstration system for potential standby customers.
  • provide interfaces allowing local and remote display of energy consumption and related savings (such as large screen local LCD display and potential web interface allowing customers to log on and see a system in action). This will be a valuable sales tool for these systems.
  • provide a test bed for Engineering to evaluate and develop system architectures, software controls and interfaces for future research and development activities.

The system architecture includes the following components:

  • 110 kVA Bi-Directional Inverter
  • 115 kVA Coupling Transformer
  • Initially configured with a 76 kWHr Battery Bank (3 Strings), to be replaced later with a 360 kWHr Cyclic Battery to test our Advanced VRLA battery products
  • 1000 VDC Distribution Board
  • Proprietary Battery Management System
  • Interconnection Protection Relay
Nominal Voltage L-LVAC230/400
Line FrequencyHz50
Nominal Battery VoltageVDC720
Nominal Battery voltagekW100
Nominal EnergykWHr77
Nominal Energy Delivery TimeHr3
Minimum Depth of Discharge%50
System Round Trip Efficiency%77
Total Lifecycle ThroughputWhrInitial installation – 4,063,500
Battery type Initial Installation – 3 Strings PWL100FT
Coupling TransformerkVA115
Coupling Transformer Type%5 Limb, Star Primary, Delta Secondary,
Electrostatic Shield 1:1
Coupling Transformer Impedance%5.5
Coupling Transformer Mechanical 900H x 800W x 700D
500 Kg

DC Input  
Minimum Battery VoltageVDC700
Maximum Battery VoltageVDC1000
AC Output  
Rated Output at up to 40oCkVA110
Rated Output at 50oCkVA99
Nominal Output at 50oCVAC400
Nominal Output FrequencyHz50/60
Power Factor Range +/- 1.0
Current Distortion%<5
AC circuit Breaker 42 kA Interupt rating
Performance Data  
Efficiency (Max Estimated)96.7% 
System Heat losses (Approx.)<10 kW 
Mechanical Data  
Ambient Temperature Range0 to + 40 C 
Relative Humidity0 – 95% non 
Environmental ProtectionIP21 
Cooling SystemAir Cooled 
Estimated Size(W x D x H) 1900 x 600 x 2290 
Weight (approx.)500 Kg