Containerized Energy Storage System

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of containerized energy storage system in China. If you're going to buy customized containerized energy storage system made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

 

Traditional Installation vs Factory Integration

Traditionally, developers needed to purchase batteries, PCS units, transformers, switchgear, cooling equipment, EMS, and auxiliary systems from different suppliers before completing electrical installation, cable routing, protection coordination, and commissioning on site. This approach often resulted in longer construction schedules, increased engineering complexity, and higher installation costs.

 

GNEE Electric simplifies this process by delivering a fully integrated Containerized Battery Energy Storage System with Transformer. All primary electrical equipment is installed, wired, and tested in the factory, significantly reducing on-site installation work while improving system consistency and quality.

 

Faster Installation

After delivery, installers only need to complete the foundation, connect external medium-voltage and low-voltage cables, communication interfaces, and grounding systems before final commissioning. Compared with conventional site-built solutions, the factory-integrated design shortens project schedules, reduces construction risks, and minimizes field labor requirements.

 

 

• Integrated Design: The step-up transformer and converter are integrated, simplifying installation and saving space
• Intelligent Cooling: Top-mounted centrifugal fans provide forced ventilation, combined with intelligent temperature control and zoned cooling to prevent thermal coupling, ensuring stable operation under high loads
• High Protection Rating: IP54, C4-M corrosion-resistant, and rain- and dust-proof construction, suitable for various extreme outdoor environments
• Smart O&M: Multi-protocol compatibility, support for EMS remote management, and a modular design that simplifies maintenance and reduces O&M costs

 

 

Item	Specification
Integrated Unit Rated Power	2.5MW / 3.45MW / 5MW / 6.25MW / 6.9MW / 10MW
Transformer Type	Three-phase Oil-Immersed Step-up Transformer
Transformer Rated Power	2500kVA@45°C / 2625kVA@40°C 3450kVA@45°C / 3625kVA@40°C 5000kVA@45°C / 5250kVA@40°C 6250kVA@45°C / 6600kVA@40°C 6900kVA@45°C / 7250kVA@40°C 10000kVA@45°C / 10500kVA@40°C
Transformer Impedance	6% / 6% / 8% / 9% / 9% / 10% (Customizable)
Vector Group	Dy11 (Dy11y11 available for multi-winding configurations)
LV / MV Voltage	0.69kV / 33kV (10kV–35kV customizable)
Transformer Standard	Designed in accordance with IEC 60076 (Efficiency and loss level customizable according to project requirements)
Oil Temperature Rise	Top-oil temperature rise ≤60K
Cooling Method	ONAN / ONAF (Automatic intelligent forced-air cooling)
RMU Configuration	DCV (DV / CV / CCV optional)
Medium-Voltage Switchgear	Up to 40.5kV, 630A, 31.5kA
Current Transformer (MV)	40.5kV, ratio customizable

 

Medium-Voltage Compartment

Item	Specification
Position Indicator	DXN-Q1, AC/DC220V
Electromagnetic Interlock	DSN-AMZ
Space Heater	220V, 200W (Customizable)
Internal Lighting	LED, AC220V
Selector Switch	Remote / Local / OFF
Miniature Circuit Breaker	AC220V, 63A, 2P
Temperature & Humidity Controller	With sensor and heater control
Digital Ammeter	Optional
Smoke Detector	Optional
Temperature Detector	Optional
Auxiliary Transformer	Customizable
Communication Protocol	IEC 60870-5-104 (IEC 61850 optional)

 

Low-Voltage Auxiliary Compartment

Item	Specification
UPS	1kVA standard (1–2kVA optional), backup time 30–120 min
Current Transformer	0.66kV, Class 0.5 / 5P, 5VA
Low-Voltage Fuse	125A (Customizable)
Surge Protection Device	Type II, 385V, 3+1 configuration
Industrial Ethernet Switch	8×Gigabit RJ45 + 4×Gigabit SFP
DC Power Supply	24VDC, 120W
Centrifugal Fan	Automatic temperature-controlled
Capacitor	For fan operation or reactive power compensation
Backup Battery	12V Maintenance-free Lead-acid Battery
AC/DC Miniature Circuit Breaker	32A, 2P
Service Socket	250V, 10A
Temperature & Humidity Controller	With automatic heater control
Heater	220V, 200W
AC Contactor	220V
Auxiliary Relay	Plug-in type
Distribution Terminal	250A
Miniature Circuit Breaker	6A–32A, 2P/3P/4P optional
Moulded Case Circuit Breaker	125A–250A, 4P
Multifunction Power Meter	Accuracy Class 0.5S

 

General Specifications

Item	Specification
Dimensions	6058 × 2438 × 2896 mm / 12192 × 2438 × 2896 mm
Ambient Temperature	−35°C to +60°C (operation with derating down to −45°C)
Installation Altitude	Up to 4000 m (derating above 1000 m)
Relative Humidity	5–100%, non-condensing
Corrosion Protection	C3H standard (C4/C5 optional)
Enclosure Protection	Container: IP54; Transformer: Hermetically sealed oil-filled design
Applicable Standards	IEC 60076, IEC 62271-100, IEC 62271-102, IEC 62271-200, IEC 61850 (optional), IEC 60870-5-104

 

 

The Containerized Energy Storage System integrates all major electrical equipment and auxiliary systems into a single factory-assembled enclosure. Each component is optimized for reliable operation, efficient energy conversion, and simplified maintenance.

 

• Battery Energy Storage System (BESS): Composed of high-performance battery racks and a Battery Management System (BMS), providing safe, stable, and high-capacity energy storage with real-time monitoring of voltage, temperature, and state of charge (SOC).
• Power Conversion System (PCS): Converts DC power from the battery into AC power for grid connection and manages bidirectional power flow during charging and discharging with high conversion efficiency.
• Oil-Immersed Step-up Transformer: Steps up the low-voltage output from the PCS to the required medium-voltage level for grid connection while providing electrical isolation and reliable long-term operation.
• Medium-Voltage Switchgear: Integrates protection, switching, metering, and fault isolation functions to ensure safe and reliable medium-voltage power distribution.
• Energy Management System (EMS): Monitors and controls the entire energy storage system, enabling intelligent energy scheduling, remote operation, data analysis, and seamless integration with SCADA and utility control systems.
• HVAC Cooling System: Maintains the optimal operating temperature of batteries and electrical equipment through intelligent temperature control, improving efficiency, safety, and battery service life.
• Fire Protection System: Equipped with smoke detection, temperature monitoring, automatic fire suppression, and alarm functions to enhance operational safety and comply with international safety requirements.
• Auxiliary Power and Communication System: Includes UPS, auxiliary power supply, industrial communication devices, and protection relays to ensure continuous system monitoring, control, and reliable communication with external power management platforms.

 

 

1. New Energy Power Station Energy Storage

As a professional Containerized Energy Storage System launched by GNEE Electric, the BESS Transformer integrated structure is perfectly matched for photovoltaic and wind power plants, realizing power smoothing, peak shaving and new energy consumption, solving the problem of unstable output of renewable energy.

4. Harsh Outdoor Environments

With an IP54-rated enclosure and optional C4/C5 corrosion protection, the system is designed for reliable operation in demanding environments such as coastal regions, desert solar farms, mining sites, and high-temperature industrial facilities. Its rugged design ensures long-term performance under conditions of high temperatures, salt spray, dust, and humidity.

 

Professional Vertical Manufacturing Strength

With 18+ years of experience in power transformer and energy storage equipment R&D and manufacturing, GNEE Electric owns a modern standardized factory, professional production lines, and a complete quality control system.

We have independent R&D and production capabilities for both Energy Storage Transformer and Containerized Energy Storage System, enabling one-stop manufacturing control from core components to final system integration.

Each system undergoes strict production procedures, including electrical inspection, performance testing, and factory commissioning before delivery.

 

 

Strict Quality Control & Testing Capability

GNEE Electric follows IEC international standards and implements ISO9001 quality management throughout the manufacturing process.

Before shipment, each Containerized Energy Storage System and ESS All-In-One Unit is subjected to comprehensive inspections, including:

• Routine Test
• Type Test
• Safety Test
• Insulation Test
• Full-load aging test
• System performance verification

Factory Acceptance Test (FAT) is also available to help customers confirm system performance, protection functions, and technical parameters before installation.

 

Customized & One-Stop Global Service

Different from standard energy storage suppliers, GNEE Electric provides customized solutions based on different project requirements, including capacity configuration, voltage level, transformer integration, and environmental adaptation.

We support the complete project process from technical proposal design and datasheet preparation to export packing, global shipping, installation guidance, and overseas technical support.

With successful applications in renewable energy, industrial power supply, and commercial energy storage projects, GNEE Electric helps customers achieve reliable and efficient energy storage deployment.

 

 

GNEE Electric provides exclusive customized technical solutions for global Containerized Energy Storage System projects, including capacity matching, voltage grade customization and special environmental reinforcement for BESS Integrated Substation and Energy Storage Compact Substation projects.

Whether you need standard ESS All-in-One Unit or tailored BESS Transformer integrated energy storage equipment, our professional electrical engineering team can provide one-stop solution, detailed technical datasheet and formal quotation free of charge.

Request A Quote

 

Send your project voltage, capacity and site conditions - Get free customized solution & quotation within 24 hours.

 

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