Commercial & Industrial ESS

All-in-One ESS 125kW / 261kWh
CI ESS261 Energy Cube

The Air-cooled Energy Cube utilizes an independent air cooling system, achieving high energy density. It offers high efficiency, low noise, safety, reliability, and easy scalability. When integrated with PCS (Power Conversion Systems), it can regulate grid voltage, correct three-phase imbalance, and manage harmonics, enhancing power quality.

Weltrus Commercial & Industrial ESS 125kW/261kWh CI ESS261 cabinet
PV / DG Application
Intelligent Energy Control
98.8% Max. Efficiency
IP54 Protection Degree
Integrated Design

Power Energy Fully Evolved

The Air-cooled Energy Cube utilizes an independent air cooling system, achieving high energy density. It offers high efficiency, low noise, safety, reliability, and easy scalability.

When integrated with PCS (Power Conversion Systems), it can regulate grid voltage, correct three-phase imbalance, and manage harmonics, enhancing power quality.

With a footprint of only 1.3㎡, its modular design and high protection level make it adaptable to various applications, serving as a backup power source to help businesses reduce energy costs and increase the use of green energy.

Integrated ESS architecture diagram showing PCS, Battery, EMS, Grid, Load connections
Ultimate Temperature Control

Dynamic Liquid Cooling

Independent Liquid Cooling

Features liquid cooling design with low noise operation at ≤75dB.

Safe & Reliable

Partitioned system isolation with active safety monitoring and PACK-level immersion fire protection technology.

Cloud-Edge Collaboration

Advanced cloud-edge computing architecture for intelligent energy management and real-time optimization.

Modular Design

Modular structure for easy installation and commissioning, allowing flexible expansion as needed.

EMS Energy Storage Cloud

Multiple Strategy Modes
Maximizing Economic Returns

Cloud Control

The system dynamically monitors and assesses the local device data, allocates power outputs for various energy storage devices, coordinates power among multiple devices, optimizes operational modes — ensuring the highest system utilization efficiency and maximum returns.

Security Monitoring

24/7 Cloud-Based Real-Time Monitoring, Analyzing Battery Pack Consistency and Safety. Advanced Algorithms Predict Potential Risks with Real-Time Warnings, Ensuring Battery and Equipment Safety. Rapid Dispatch and Repair in Case of System Failures.

Increase Earnings

Real-time monitoring of device operation status, peak and off-peak power consumption, load power, and energy storage revenue through the system. Achieve remote control of devices and online system updates, optimize device operation strategies — offering peak shaving, demand control, emergency control, load tracking, and various other strategies to enhance overall economic benefits.

Application Scenarios

Versatile Deployment Options

During periods of low electricity prices, use the grid to charge the devices. During periods of high electricity prices, discharge the batteries to power the load.

Seamlessly switch to battery backup during grid outages, ensuring critical loads remain powered and business continuity is maintained.

Compensate for power fluctuations and provide reactive power support to stabilize the electrical system and improve power quality.

Integrate solar PV generation with energy storage to create a self-sufficient microgrid, reducing dependence on the utility grid and maximizing renewable energy utilization.

Technical Specifications

Product Parameters — CI ESS261

DC Side Parameter

Battery TypeLFPOperating Voltage Range672V — 864V
Configuration1P260SCooling MethodForced Air Cooling
Rated Capacity314AhCoolantEthylene glycol solution (50% v)
Rated Energy261kWhCycle Life6,000 cycles
Rated Voltage768VFire Protection SystemAerosol
Rated Power125kWDetector TypeTemperature / Smoke Sensor / Water Leak
Rated Charge/Discharge C-rate0.5P

AC Side Parameters

Rated AC Power125kW — 137.5kW
Wiring MethodThree-phase, four-wire
Allowed Grid Voltage230V/400V (−15% ~ +15%)
Allowed Grid Frequency50Hz/60Hz ± 2.5Hz
Power Factor0.99

System Parameters

Operating Environment−20°C to 50°C (de-rated operation above 45°C)
Noise Level≤75dB
Dimensions (W×D×H mm)1200 × 1553 × 2310
WeightAbout 2.4t
Water Resistance RatingBattery compartment: IP65, Electrical compartment: IP54
Allowed Relative Humidity0–95% (non-condensing)
Maximum Altitude≤2000m (degraded above 2000m)
Communication InterfaceCAN, Ethernet
Communication ProtocolModbus TCP/RTU
System Operation ModePeak shaving, demand control, reactive power adjustment, grid scheduling interface, Remote dispatch, local data storage, anti-backflow feature
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Project Cases

Real-World Deployments

Singapore

500 kW / 2 MWh

Netherlands

100 kW / 100 kWh

Croatia

300 kW / 600 kWh

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