ATEN 50kW BESS

ATEN 50kW BESS

The ATEN 50kW BESS (Battery Energy Storage System) is an all-in-one system built around a 50 kW power conversion system designed for either grid connected or totally off grid applications. The ATEN-50 offers light commercial customers turn key energy storage systems that are designed for 10+ years of hassle free energy generation and usage. It comes in three capacity sizes: 64 kWh, 128 kWh, and 192 kWh.

The ATEN 50kW pairs seamlessly with a number of different energy sources. Typically Solar, Grid, and Diesel Gensets are paired together to make mini-grid applications.

Battery Pack

ATEN 9.2kWh Battery Pack

The ATEN P9 battery pack is based on Lithium Iron Phosphate Cell technology.  16 cells are configured 2 parallel/8 in series.  The duct free design and active ventalation design ensures better cooling efficiency and longer life spans (5000 cycles with up to 1C rating).

AGreatE's P9 9.2kWh LFP Battery Pack for BESS Systems
High Voltage Control Unit

High Voltage Control Unit

R138 HVU is a multi stage charge protection device that offers duel channel power supply and safety disconnect functionality (160 to 205 Amp circuit breaker with 250 Amp fuse).  Designed with a 10 year operational life expectancy.

AGreatE's High Voltage Drawer Unit for BESS Systems
Battery Rack

ATEN P9 Rack

AGreatE's ATEN-R138 Battery Rack is a reliable, long cycle life, modular, and scalable lithium iron phosphate (LFP) battery energy storage system.  Perfectly integrated as a (BESS) building block for PV + BESS + Charging applications.

AGreatE's ATEN R138 Battery Rack for BESS Systems
PCS and DC/DC Converter

50 kW PCS and
DC/DC Converter

At the heart of the power system is the bi-directional power conversion system which supports grid, PV, and gensets and includes a built in transformer & STS (static transfer system) to control.  Utilizing a modular design, the DC/DC converter can be configured with shared or separate DC bus for the PV and battery system.

AGreatE's Power Control System, PCS for BESS Systems
Smart BESS Controller

Smart BESS Controller

The BESS Controller is the brains of the system.  A complete data acquisition system designed with multiple overload and reverse power protections.  With a built in HMI this system enables the complete control and overview of the BESS system.

AGreatE's BESS Controller for Battery Energy Storage System
BESS System Monitoring

BESS System Monitoring

Cloud Based EMS enables a comprehensive view of real-time data, historical data, reports, and energy forecasting.

AGreatE's BESS Monitoring System Software on a Computer or Laptop
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ATEN 50kW Benefits

  • The 50kW PCS Cabinet Contains a Hybrid 50kW PCS with 250V~520V DC Voltage
  • The 192kWh Battery string is Converted to 400V AC through the 50kW Hybrid PCS, AC Power is Transferred to the Isolated Transformer Supporting the Loads
  • The Battery String is Charged from the PV System 50kW DC/DC During Day Time Operation
  • Power Supply will be Switch to DG by the ATS and STS Seamlessly Transferred to PCS when BESS and PV are Short of Supply


Common Applications

  • Increased Self-Consumption/Self-Sufficiency from Solar plus Storage
  • Commercial Centers and Malls looking to Offset Power Costs
  • Hotels, Hospitals, Schools
  • Frequency Regulation
  • Demand Charge Reduction
  • Backup Power/ Uninterruptible Power Systems
  • PV + BESS + Charging Stations
  • Clean Energy Minded Companies
  • Small Micro-Grid Projects

50kW BESS Systems Include

The ATEN 50kW battery energy storage systems (BESS) contains the full battery system with battery management system and three phase power conversion system. Designed to seamlessly integrate with Solar, Wind, Grid, or Gensets, the ATEN 50kW is the building block to clean energy systems including On-Grid hybrid and Micro-Grid Systems.

ATEN 50kW Systems are fully certified and include:

  • The system storage cabinet
  • 50 kW power conversion system (PCS)
  • ATEN R64 Racks (1, 2 or 3 depending on size)
  • BESS Controller with Battery Management System
  • HVAC System for temperature and humidity management
  • WiFi system monitoring so you can check performance anytime
  • System safety labels for better user safety and awareness
  • Installation manual for the entire BESS system
  • Commissioning and annual inspection documents
  • Electrical 3 line & mechanical drawings

Our ATEN BES Systems are designed to make logistics, installation, and commissioning easier.


Enclosure dimensions:

D = 1,300mm, W = 2,250mm, H = 2,591mm

D = 4’3″, W = 7’2″, H = 8’6″


ATEN 50kW BESS System Diagram


Product Image Gallery


Electrical Specifications

ElectricalATEN 50-64ATEN 50-128ATEN 50-192
Rated Energy Capacity64kWh128kWh192 kWh
Rated DC Voltage358.4V358.4V358.4V
Rated AC Power50kW50kW50kW
Rated Grid Voltage400 ~ 480V400 ~ 480V400 ~ 480V
AC Rate of Current60-72A60-72A60-72A
Grid Frequency Range50Hz/60Hz ± 2.5%50Hz/60Hz ± 2.5%50Hz/60Hz ± 2.5%
Isolation Method3 Phase 4 Line Transformer3 Phase 4 Line Transformer3 Phase 4 Line Transformer


General Specifications

GeneralATEN 50-64ATEN 50-128ATEN 50-192
Dimensions (L/W/H)2250/1300/2591mm2250/1300/2591mm2250/1300/2591mm
Weight<5T<5T<5T
Protection RatingIP54IP54IP54
Operating Temperature-20 ~ 40°C-20 ~ 40°C-20 ~ 40°C
Max Altitude3000m3000m3000m
Communication InterfacesRS485, Ethernet, GPRSRS485, Ethernet, GPRSRS485, Ethernet, GPRS
CertificationIEC62619, UN38.3, CE, UL1973, UL9540AIEC62619, UN38.3, CE, UL1973, UL9540AIEC62619, UN38.3, CE, UL1973, UL9540A


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The accuracy or completeness of the System Information is not guaranteed and is subject to change without notice. No license under any AGreatE or third party intellectual property rights is implied or granted with this Information. Customers are solely responsible for evaluating and selecting the Systems and determining whether each System is fit for a particular purpose and suitable for its particular use and method of application. Our Systems are not manufactured to any Customer requirements or specifications unless expressly agreed to in writing by AGreatE.