ESS Energy Storage System for Diesel Microgrids

The BESS-G-125-271 ess energy storage system pairs a 125 kW PCS with a 271 kWh battery cluster to turn diesel generator sites into efficient microgrids, cutting fuel consumption, balancing loads and keeping voltage and frequency stable.

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ModelBESS-G-125-271
AvailabilityIn stock
  • CE & TUV certified
  • Worldwide shipping
  • OEM & ODM support

Product Features of ESS Energy Storage System

The BESS-G-125-271 ESS energy storage system upgrades a generator set from a single backup source into an efficient, intelligent, and integrated power supply. Its main features are:

  • Reduced fuel consumption: the system charges at low load and discharges at peak load, so the generator runs in its efficient range and uses less fuel with less wear.
  • Load balancing: smooths the load curve and absorbs instantaneous peaks, which allows a smaller, lower-cost generator set to be selected.
  • Stable power output: responds instantly to sudden load increases such as large motor start-ups, protecting voltage and frequency for sensitive equipment.
  • Status indication: a 7-inch resistive touchscreen shows system status, including load, storage capacity, and power.
  • Multi-mode operation: multi-level priority control gives reliable power from PV, energy storage, grid, diesel generators, and loads.
  • Battery management: the integrated BMS monitors and protects the ESS battery system.
  • Remote monitoring: multi-end remote access through a self-service platform and device-side protocols.
  • Easy installation: IP54 cabinet with flexible installation options; up to 5 PCS can run in parallel.
  • Built-in safety: aerosol fire module, with CE, IEC 62619 and UN38.3 certification.

Commercial Applications of ESS Energy Storage System

This ESS energy storage system suits commercial and industrial sites that are powered only by diesel or gas generator sets. Acting as an industrial BESS beside the generator, it removes the need to size and run the generator for every short peak. Where PV is available, the same priority control can combine it with storage, grid, and generator in one solar ESS system.

Commercial Applications of ESS Energy Storage System

Applications & Use Cases

  • Backup: storage supplies the load during generator failure, generator maintenance, or nighttime power needs.
  • Diesel-electric hybrid system: the generator runs at an efficient, stable load while storage covers valleys and peaks, cutting fuel and maintenance costs.
  • Emergency power supply: instant response keeps voltage and frequency steady so sensitive equipment does not shut down from power quality problems.
  • High-power portable power station: short-term high-power support for large motor start-ups and other sudden load increases.

Technical Specifications of ESS Energy Storage System

The BESS-G-125-271 ESS energy storage system combines a 271 kWh, 864 V battery cluster with a 125 kW PCS in one IP54 cabinet.

Battery Parameters

ItemParameterValue
Battery moduleVoltage57.6 V
Battery moduleCapacity314 Ah
Battery moduleEnergy18 kWh
Battery moduleCooling methodDry self-cooling
Battery clusterRated voltage864 V
Battery clusterGrouping method1P 270S
Battery clusterRated capacity314 Ah
Battery clusterOutput voltage range756 V ~ 950 V
Battery clusterRated energy271 kWh
Battery clusterMax continuous charging current157 A
Battery clusterMax continuous discharge current157 A
Work environmentCharging operation temperature range0 ~ 45 °C
Work environmentWorking humidityRH ≤ 80%
Work environmentStorage humidityRH ≤ 80%

AC Side (PCS Parameters)

ParameterValue
Rated current181 A
PCS overload capacity×1.1 continuous; ×1.25 (30 ms)
PCS output power125 kW
AC-side voltage of PCS3P/N/PE, 230/400 V
Frequency50/60 Hz
Power factor-1 ~ 1
Battery side voltage680 V ~ 950 V
ParallelMax 5 PCS

System Parameters

ParameterValue
Dimension (W × D × H)2120 × 1470 × 2230 mm
Weight3210 kg
Display7-inch resistive touchscreen
Fire protection systemAerosol fire module
Degree of protectionIP54
CertificationCE; IEC 62619; UN38.3
Working temperature range-30 ~ 60 °C (derating above 45 °C)
CoolingDry self-cooling
Relative humidity5 ~ 95% (no condensing)
Highest altitude4000 m (derating above 2000 m)

Dimensions and Wiring of ESS Energy Storage System

The ESS energy storage system cabinet measures 2120 mm wide, 1470 mm deep, and 2230 mm high and weighs 3210 kg. The drawing shows the front, side, and back views.

Dimensions and Wiring of ESS Energy Storage System

 

System topology

 

Applicable Equipment

The system is supplied as a distribution cabinet plus the BESS-G 125-271 ESS-Diesel cabinet.

ESS-Diesel cabinet

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