2.5MW Pre-Integrated Transformer Containerized Energy Storage System

Our 2.5MW pre-integrated transformer containerized energy storage system delivers scalable grid-side and large-scale commercial storage with turnkey deployment.

• 2.5MW AC output; flexible capacity (5–7.5MWh); ≥91% round-trip efficiency; ≤100ms response time.

• LFP battery: ≥8000 cycles at 90% DoD; 1500V DC; liquid cooling.

• PCS with ≥99% efficiency; THDi ≤2%; integrated 2750kVA dry-type transformer supports 10.5–35kV grid connection.

• 40ft IP54 container with rack-level fire suppression, local SCADA, and cloud monitoring.

• Complies with IEC 62933, UL 9540, IEEE 1547; supports frequency regulation, peak shaving, and black start.

• Factory pre-assembled for rapid deployment; fast delivery and reliable quality.

Utility-Scale Capacity (2.5MW / 5MWh)

All-in-one containerized design for large renewable farms.

2.5MW / 5MWh Capacity

Advanced Liquid Cooling

Pre-Integrated Transformer

This 2.5MW pre-integrated transformer containerized energy storage system is engineered for utility-scale and large industrial hybrid solar-storage projects, frequency regulation and grid support services.

Unlike smaller container ESS solutions, this all-in-one unit integrates transformer, PCS, battery cluster, fire suppression, liquid cooling and BMS/EMS inside one pre-fabricated container. It minimizes site civil work, cuts on-site installation time and reduces overall project commissioning risk for EPC contractors.

Built to withstand harsh outdoor environments, the system supports fast response for primary and secondary frequency regulation, black-start capability and peak shaving. Its higher power rating makes it ideal for grid-connected substations and large renewable farms where higher capacity and stable grid interconnection are required.

Our turnkey delivery includes factory pre-testing, technical documentation, on-site guidance and after-sales support. If you are sourcing containerized ESS for MW-level grid or hybrid renewable projects, contact us for datasheet and project reference.

Technical Specifications

The 2.5MW pre-integrated transformer design removes the need for separate on-site transformer foundation and cabling work. All core electrical components are fully pre-assembled and tested at our factory before shipment. This significantly shortens project timeline, lowers site construction cost and mitigates interface risks between battery, PCS and transformer.

Item	Parameter	Remark
I. System General
Rated AC Output Power	2.5 MW
Rated Energy Capacity (Typical)	5 MWh	Flexible configuration (e.g., 1.5h, 2h, 3h discharge duration)
System Round-Trip Efficiency (AC-AC)	≥ 91%	Including PCS & transformer losses
Response Time	≤ 100 ms	From zero to full power output
Operation Mode	Grid-tied / Islanded (Optional)
Communication Interface	IEC 61850, Modbus TCP/RTU, CAN	Compatible with higher-level dispatch systems
II. Battery Energy Storage System (BESS)
Battery Chemistry	Lithium Iron Phosphate (LFP)
System Voltage	[e.g.,] 1500 V DC
Design Cycle Life	≥ 8000 cycles @ 25°C, 90% DoD
System Energy Retention	≥ 80% @ 10 years
Cooling Method	Liquid Cooling (Recommended) / Forced Air	Select based on configuration
III. Power Conversion System (PCS)
Unit Rated Power	2.5 MW (or 2×1.25MW in parallel)
Topology	Three-level / Modular Multilevel Converter (MMC)
Maximum Efficiency	≥ 99%
Power Factor Range	-0.95 ~ +0.95 adjustable
Current THDi	≤ 2% @ rated load	Compliant with IEEE 1547a
IV. Medium Voltage (MV) Transformer
Type	Dry-type (SCB Series)	Flame-retardant, explosion-proof, maintenance-free
Rated Capacity	2750 kVA
Voltage Ratio	[e.g.,] 35 kV / 0.69 kV or 10.5 kV / 0.48 kV	Customizable per project
Insulation Class	Class H
Enclosure Protection	IP54 (inside container)
V. Container & Auxiliary Systems
Container Specification	40ft High Cube Standard (Custom height available)	Dimensions: L×W×H (mm)
Enclosure Protection	IP54
Thermal Management	Industrial Precision A/C + Zoned Liquid Cooling Units	Maintains cell temperature differential ≤3°C
Fire Protection System	Total-flooding Gas Suppression (HFC-227ea / Novec 1230) + Rack-level Protection	Meets UL 9540A test requirements
Monitoring System	Local SCADA + Cloud-based Remote O&M Platform
VI. Environmental & Certification
Operating Temperature Range	-25°C ~ +50°C	Derated operation at temperature extremes
Relative Humidity	≤ 95%, non-condensing
Altitude	≤ 4000 m (Derated above 1000m)
Design Standards	IEC 62933, UL 9540, GB/T 36276, NB/T 31016
Grid Compliance	IEEE 1547, IEC 61727, CE, UKCA (Optional)

FAT test

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In-house Pre-integration and FAT (Factory Acceptance Test)

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for 2.5MW Pre-Integrated Transformer.

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Pre-assembled & Ready for Transport
All core components (transformer, PCS, and battery clusters) are fully integrated and tested inside the 40ft container before shipment. This modular design significantly reduces the number of separate shipments required and eliminates complex on-site assembly, ensuring a faster and smoother project delivery.

Factory Pre-assembled for Faster Deployment
Our 2.5MW containerized ESS undergoes complete assembly and integration at our manufacturing facility. The battery clusters, PCS, transformer, and thermal management systems are fully pre-installed and wired before shipment. This in-house pre-assembly process significantly minimizes on-site civil work, eliminates complex field cabling, and guarantees high-quality control standards for EPC contractors.

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