ESS Compact Substation

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

GNEE Electric ESS Compact Substation, is a factory fully pre-assembled, weathertight integrated power station customized exclusively for battery energy storage systems (BESS/ESS).

As a professional BESS Step-Up Substation, ESS Transformer Substation and Energy Storage Transformer Substation, our unit tightly integrates four core modules inside one standardized metal container enclosure:

• Medium Voltage (MV) SF6 Ring Main Unit (RMU) switchgear
• Bidirectional PCS boost integrated machine (DC/AC power conversion core for energy storage)
• Oil-immersed distribution transformer (Dyn11 vector group, 500kVA–10000kVA capacity range)
• Low Voltage (LV) distribution switchboard & intelligent auxiliary control system

Different from conventional box-type substations for single PV/wind power, our Energy Storage Substation and BESS Substation support full four-quadrant bidirectional power flow to match the charging & discharging working logic of lithium battery energy storage systems. All wiring, protection, communication debugging and performance testing are finished in GNEE Electric's factory, drastically cutting on-site construction, labor and logistics costs for global energy storage projects.

This all-in-one BESS Transformer Substation is delivered as a complete packaged solution, only requiring simple concrete foundation placement and cable connection before grid connection, making it a cost-effective compact substation for utility-scale storage parks, commercial & industrial peak shaving microgrids, solar-storage hybrid power plants and off-grid energy systems.

MV Switchgear Chamber (Equipment Rated Voltage 12kV / 24kV / 40.5kV)

• SF6 insulated ring main unit, IP67 gas tank protection, annual gas leakage ≤0.1%
• Short circuit withstand: 20kA/3s, rated current 630A, compliant with IEC 62271-201
• Independent compartment design with internal arc classification (IAC) per IEC 62271-200, safe isolation for maintenance
• RMU configured with protection relay/fuse combination for transformer protection; VCB-based protection available for larger capacities

Note: 12kV / 24kV / 40.5kV are equipment rated voltages (Um per IEC 62271-1), corresponding to system voltages of 10/11kV, 20/22kV and 35kV respectively

ESS PCS Boost Integrated Module (Core of Energy Storage Substation)

• DC input range: 1050V–1500V, compatible with mainstream 1500V lithium BESS battery clusters
• PCS max conversion efficiency up to 98.5%, current total harmonic distortion (THDi) <3%
• Full four-quadrant operation, reactive power compensation, power factor >0.99
• Supports CAN/RS485/RJ45/fiber communication, Modbus RTU/TCP, IEC 61850, IEC 60870-5-104 protocols, seamless docking with EMS and BMS

Energy Storage Special Distribution Transformer (ESS Transformer Substation Core)

• Capacity range: 500kVA–10000kVA (units above ~3450kVA supplied as multi-PCS / multi-container configuration), aluminum/copper winding optional
• Cooling: ONAN natural cooling / ONAF forced air cooling; mineral oil (25#/45# grades per GB 2536) or natural ester insulation oil
• Anti-corrosion design per ISO 12944-2 (C4 / C5-M standard; high (H) / very high (VH) protection systems optional) for coastal, desert and high-humidity harsh environments
• Temperature rise per IEC 60076-2: 60K top oil / 65K average winding, with overload design for the frequent charge-discharge cycles of BESS

LV Distribution & Auxiliary Control Cabinet

• LV nominal voltage 690V, operating range 621–759V (±10%), max AC output current 1588A (matching 1897kVA max PCS power)
• Built-in 1kVA–2kVA UPS (15min/1h/2h backup) for control power
• Complete protection suite: overvoltage, overcurrent, short circuit, overheating, insulation monitoring, anti-islanding protection for grid code compliance

 Weatherproof Enclosure (IP54 / IP55 Protection Level)

• Standard 40ft high-cube container dimension: 12192 (L) × 2438 (W) × 2896 (H) mm, modular expandable design
• Operating temperature: -35°C ~ +60°C (derating above 45°C); storage -40°C ~ 70°C
• Adapt to altitude up to 5000m (derating over 3000m), 0–100% humidity without condensation
• Natural + forced dual ventilation system, dustproof, rainproof, salt-spray resistant for outdoor long-term operation

Optimized for Energy Storage Bidirectional Working Logic

Most compact substations on the market only support unidirectional power transmission for PV/wind.

Our ESS Compact Substation, BESS Step-Up Substation and Energy Storage Transformer Substation adopt advanced three-level (NPC) bidirectional PCS topology to perfectly match the frequent charging & discharging of BESS systems, realizing flexible peak shaving, frequency regulation, voltage support and microgrid off-grid switching, greatly improving grid resilience and energy storage project revenue.

Ultra Short Project Construction Cycle & Lower Total Cost

Full factory prefabricated & pre-tested design cuts on-site construction period by up to 70% compared with civil-built traditional substations.

Integrated modular structure reduces transportation volume, field wiring labor and auxiliary material investment, significantly lowering the overall CAPEX of energy storage power stations.

As a complete package substation, customers receive one-stop solution without purchasing scattered MV, transformer and PCS equipment separately.

Compact Footprint & Flexible Layout

The integrated containerized design takes only 1/5 land occupation of conventional separate room substations, critical for land-locked industrial parks, rooftop PV storage projects and limited-area utility storage parks.

Modular unit design allows parallel expansion of multiple BESS Compact Substation units according to project power scale.

Extreme Environmental Adaptability for Global Markets

Customized anti-corrosion grades (C4 / C5-M per ISO 12944-2) support deployment in Middle East desert, Southeast Asian coastal salt fog, Africa high temperature & high humidity, Northern Europe low temperature cold regions.

IP55 enclosure combined with anti-corrosion coating prevents dust ingress, rain intrusion and corrosion in coastal environments, enabling stable 24/7 operation all year round.

Easy Installation, Intelligent O&M & Low Maintenance Cost

All compartments reserve wide maintenance access doors for quick component inspection and replacement.

Equipped with remote online analysis & fault diagnosis system, engineers can monitor operation data and locate abnormal points remotely without field visit, cutting after-sales operation cost.

All core components adopt international standard universal models for convenient spare parts supply worldwide.

Full International Standard Certification

Our Energy Storage Substation, BESS Substation and ESS Transformer Substation pass IEC 62271-202, IEC 60076, CE, ISO9001 certification, and support the IEC 61850 communication protocol for seamless grid integration, fully meeting grid access standards of EU, Southeast Asia, Australia, Middle East, Africa and Latin America countries, with no extra certification barrier for overseas project grid connection.

• Utility-scale grid-side energy storage power stations (500kW–10MW per unit by PCS rating; transformer 500kVA–10000kVA; parallel expansion for 50MW/100MW storage parks)
• Solar & wind hybrid energy storage systems (match PV farm / wind turbine output fluctuation)
• Commercial & Industrial (C&I) microgrid BESS peak shaving, demand charge reduction
• Off-grid & island microgrid energy storage power supply
• Data center, mining plant, chemical factory backup energy storage system
• New Zealand, Australia, Southeast Asia PV farm step-up storage projects
• EV supercharging station integrated energy storage system

18 Years Professional Power Equipment Manufacturer

GNEE Electric owns full production lines for transformers, switchgear, PCS integrated cabinets and container enclosures, independent R&D laboratory, strict ISO quality control system, no middlemen, factory direct supply with competitive factory price for global energy storage contractors, EPC companies and power utility clients.

Full Customization Support for Global Projects

We customize voltage grade, transformer capacity, enclosure anti-corrosion grade, communication protocol, UPS backup time, cooling mode and container size according to local grid standards and project environment requirements, supporting OEM & ODM service for overseas brand distributors.

Global After-Sales Service System

We provide detailed English operation manual, installation drawing, remote technical guidance, and arrange overseas engineer on-site commissioning for large-scale storage projects. Spare parts inventory support for fast delivery to Europe, Asia, Africa, Americas.

Rich Overseas Energy Storage Project Cases

Our BESS Step-Up Substation, Energy Storage Transformer Substation and ESS PCS boost integrated machines have been delivered to New Zealand PV storage farms, Uzbekistan industrial microgrids, Philippine factory energy storage systems, Middle East desert utility storage parks, with stable long-term operation feedback from clients.

Get Custom Quotation – Contact GNEE Electric Now

If you are sourcing ESS Compact Substation, BESS Compact Substation, Energy Storage Substation, BESS Transformer Substation, ESS Transformer Substation or BESS Step-Up Substation for your energy storage project, please send us your project details below to get tailored technical scheme & competitive factory quotation:

• Required rated capacity (kW/MW / kVA)
• System voltage level (10/11/20/22/33kV; equipment rated 12/24/36kV)
• Deployment environment (coastal/desert/highland/temperate zone)
• Grid frequency: 50Hz or 60Hz
• Special requirement: communication protocol, anti-corrosion grade, UPS backup time, container size

Contact Information

• Company: Henan GNEE Electric Co., Ltd.
• Email: sales@gneeelectric.com
• WhatsApp: +86 15824687445

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