ONESUN Smart BESS Cabinet: CAO-100kW / 215kWh–241kWh for Commercial & Industrial Use
As electricity demand grows and power prices fluctuate, factories and commercial complexes are increasingly turning to energy storage for peak shaving, backup power, and energy optimization.
To meet this demand, ONESUN, a world-renowned battery manufacturer, introduces the Smart BESS Cabinet (Battery Energy Storage System)—Model CAO-100kW / 215kWh–241kWh. This all-in-one solution offers stability, safety, and scalability, with full support for OEM & ODM customization.

Key Features of the CAO-100kW Smart BESS
* Highly Integrated "Plug-and-Play" Design
The system integrates batteries, PCS (Power Conversion System), EMS (Energy Management System), and protection units into a standardized cabinet. This modular architecture allows for easy expansion, making it ideal for growing enterprises looking to scale their energy capacity without high upfront costs.
* Seamless On-Grid & Off-Grid Switching
* On-Grid: Optimizes costs through peak shaving and demand-side management.
* Off-Grid: Automatically switches during power outages to ensure business continuity.
* Black Start Capability: Features islanded operation and black start functions to restore power independently during total grid failure.
* Power Quality & Solar Integration
Equipped to handle three-phase imbalance and reactive power compensation, the system improves power quality and stabilizes voltage for sensitive precision equipment. With a wide PV input range () and MPPT control, it seamlessly integrates with solar panels for a complete Solar+Storage green energy architecture.
* Intelligent Remote Monitoring
The built-in cloud platform allows users to monitor capacity, power, temperature, and system status in real-time via PC or mobile. Automated fault warnings and AI-driven maintenance significantly reduce manual inspection costs.

Safety and Reliability by Design
Safety is the core of the ONESUN BESS. The cabinet features:
* Multi-level Protection: Over-temperature, over-voltage, over-current, and leakage protection.
* Thermal Management: Advanced lithium-ion thermal management and integrated fire suppression to mitigate thermal runaway risks.
* Easy Maintenance: Removable battery modules ensure quick servicing and minimal downtime.
| Parameter | CAO-100kW / 21.5kWh | CAO-100kW / 24.1kWh |
|---|---|---|
| ⚡ PV DATA | ||
| Model | CAO-100kW/21.5kWh PV DATA | CAO-100kW/24.1kWh PV DATA |
| Rated Power | 120kW | 120kW |
| PV Voltage Range | 200~950Vdc | 200~950Vdc |
| MPPT Range | 200~850Vdc | 200~850Vdc |
| Rated Voltage (PV) | 600Vdc | 600Vdc |
| Start-Up Voltage | 250Vdc | 250Vdc |
| No. of MPPT Tracks | 4 | 4 |
| MAX. Input Current | 50A+50A+50A+50A | 50A+50A+50A+50A |
| Isc PV | 60A+60A+60A+60A | 60A+60A+60A+60A |
| 🔋 BATTERY DATA | ||
| System Capacity | 215kWh | 241kWh |
| Cell Type | LFP 3.2V/280Ah | LFP 3.2V/314Ah |
| Battery System Configuration | 1P240S | 1P240S |
| Rated Voltage (Battery) | 768Vdc | 768Vdc |
| Voltage Range (Battery) | 672~864Vdc | 672~864Vdc |
| 🌐 AC INPUT (ON GRID) | ||
| Rated Power (AC) | 100kW | 100kW |
| MAX. Power (AC) | 110kW | 110kW |
| Voltage Range (AC side) | 400Vac | 400Vac |
| Output Range | 320~460Vac | 320~460Vac |
| Nominal grid frequency | 50/60Hz | 50/60Hz |
| Power Factor | ~1.0 | ~1.0 |
| THDI | <3% (Rated Power) | <3% (Rated Power) |
| Wiring | 3P+N+PE | 3P+N+PE |
| 🏝️ AC OUTPUT (OFF GRID) | ||
| Rating output voltage | 400Vac | 400Vac |
| Rating output power | 100kW | 100kW |
| Nominal output frequency | 50/60Hz | 50/60Hz |
| THDU | <3% (Line Load) | <3% (Line Load) |
| ⚙️ SYSTEM PARAMETERS | ||
| Inverter's maximum efficiency | ≥98.5% | ≥98.5% |
| Maximum system efficiency | ≥90% | ≥90% |
| Charge and discharge rate | ≤0.5CP | ≤0.5CP |
| Fire protection system | Aerosol / Perfluorhexane | Aerosol / Perfluorhexane |
| 📦 GENERAL PARAMETERS | ||
| Expand capabilities | Parallel operation of the whole machine. | Parallel operation of the whole machine. |
| Dimensions (width x depth x height) | 2120*1300*2230mm | 2120*1300*2230mm |
| Weight | 2.4t | 2.5t |
| Environment Temperature | -20~+50°C | -20~+50°C |
| Environment Humidity | ≤95% | ≤95% |
| Working Altitude | 3000m (2000m derating) | 3000m (2000m derating) |
| Protection Level | IP54 | IP54 |
| Cooling Method | Air Cooling | Air Cooling |
| Communication | RS485/CAN/LAN | RS485/CAN/LAN |
| Certification | CE-EMC, UN38.3, CEI 0-21, EN50549-1, VDE-AR-N4105, UNE 217002, NTSTYPEA, G99, AS/NZ547772 | CE-EMC, UN38.3, CEI 0-21, EN50549-1, VDE-AR-N4105, UNE 217002, NTSTYPEA, G99, AS/NZ547772 |
Versatile Application Scenarios
The CAO-100kW Smart BESS is designed for a variety of demanding environments:
* Industrial Manufacturing: Reducing peak demand charges.
* Commercial Buildings: Ensuring reliable backup power.
* Telecommunications: Powering remote base stations.
* Outdoor & Emergency Power: Providing mobile or temporary energy solutions.

Why Choose ONESUN?
The CAO-100kW is more than just hardware; it is a comprehensive energy infrastructure. By shifting from "passive consumption" to "active energy management," ONESUN helps businesses achieve a high-efficiency, low-carbon, and stable power ecosystem.

Looking for a customized energy storage solution?
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Article Source: Lithium battery manufacturer - ONESUN China
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