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Utility-Scale Battery Energy Storage System

AINEGY 5MW/10–20MWh Grid-Connected BESS Integrated Cabin

10MWh / 20MWh · 5MW PCS · 1331V Battery Platform · 5500kVA Transformer · 11kV Grid Connection

A high-capacity grid-connected energy storage platform engineered around the complete power path from battery energy to an 11kV project grid interface.

The AINEGY 5MW Grid-Connected BESS Integrated Cabin is available with 10MWh or 20MWh battery capacity. The utility-scale energy storage system combines battery containers, BMS, 5MW PCS, EMS, liquid cooling, fire protection and 5500kVA transformer matching for grid-side, renewable integration and large industrial energy storage projects.

5MW PCSShared power-conversion platform for both 10MWh and 20MWh configurations.
10MWh / 20MWhTwo energy configurations for different storage-duration requirements.
1331V Battery PlatformHigh-voltage battery architecture for MW-level grid-connected energy storage.
1000–1500Vdc5MW PCS DC operating voltage range.
690Vac → 11kV5500kVA transformer matching for medium-voltage grid connection.
EMS + Liquid CoolingSystem operating visibility and high-capacity battery thermal management.

A 5MW Grid-Connected Energy Storage Platform, Not Only a Battery Container

Large grid-connected energy storage projects require more than battery capacity. Battery voltage, PCS power conversion, AC current, transformer matching, grid voltage and system control must form one clear electrical architecture.

The AINEGY platform connects a 10MWh or 20MWh battery system to a 5MW PCS, converts power through a 690Vac AC interface and uses a 5500kVA transformer to match the system to an 11kV grid connection.

For broader product-form comparison, review AINEGY Containerized BESS and the Containerized Battery Energy Storage Systems category.

5MW PCS10MWh20MWh1331V Battery690Vac11kVEMSLiquid Cooling
System Power

5MW Power Conversion for Both Energy Configurations

Both models use a 5MW PCS power class, allowing project selection to focus on required battery energy and nominal storage duration.

Energy Capacity

Select 10MWh or 20MWh Battery Energy

The system can be configured with two or four battery container modules according to the selected energy capacity.

Grid Connection

690Vac Power Conversion to 11kV

A 5500kVA transformer matches the PCS low-voltage side to the specified 11kV high-voltage grid interface.

Project Expansion

Supports Multi-Unit Parallel Deployment

Multiple systems can be engineered in parallel for projects requiring higher total power or energy capacity.

AINEGY Engineering and Quality Support

MW-level grid-connected storage requires system engineering across battery management, power conversion, energy management, thermal control, communication and grid-side electrical interfaces. AINEGY approaches the product as one integrated power-system project.

15+

Years of BMS / EMS Technology Accumulation

Long-term development experience in battery-management and energy-management technologies.

80+

R&D Team Members

Engineering support across BMS, EMS, inverter technology, battery integration and customized energy storage systems.

120+

Countries and Regions

International project experience across different grid, communication and environmental conditions.

2500MWh+

Cumulative Battery Shipment

Manufacturing and delivery experience supporting battery integration and international project execution.

Electrical Architecture

Engineer the Complete Battery-to-Grid Power Path

Battery voltage, PCS DC range, 690Vac output and 11kV transformer interface are treated as one connected electrical architecture.

System Interfaces

Validate Battery, PCS, EMS and Communication Interfaces

System validation focuses on operating status, communication and the power-conversion interfaces that connect the storage system.

Project Engineering

Match the BESS to the Real Grid Connection

Grid voltage, project power, energy duration, communication, protection and site layout should be confirmed before final configuration.

5MW/10MWh and 5MW/20MWh Grid-Connected BESS Technical Specifications

The two configurations share a 5MW PCS platform, 1331V battery nominal voltage, 1000–1500Vdc PCS range, 690Vac AC side and 5500kVA transformer matching to an 11kV high-voltage interface.

Item5MW / 10MWh5MW / 20MWh
ModelIYP-CB10ML-5MG3-HX1IYP-CB20ML-5MG3-HX1
System
System Battery10MWh20MWh
System PCS5MW5MW
Battery Container
Battery Energy10MWh20MWh
Nominal Voltage1331V1331V
Battery Container Module Number24
Size6058 × 9752 × 2896mm6058 × 9752 × 2896mm
Approximate WeightAbout 44000kgAbout 44000kg
PCS Cabinet
PCS Power5MW5MW
DC Voltage Range1000V–1500V1000V–1500V
AC Voltage690Vac690Vac
AC Current4180A4180A
Transformer
Rated Power5500kVA5500kVA
LV Voltage690Vac690Vac
HV Voltage11kV11kV
General Parameters
Communication TypeRS485 / WiFi / EthernetRS485 / WiFi / Ethernet
Battery Protection RatingIP65IP65
Fire Protection SystemYesYes
Operating Temperature-10°C to 55°C-10°C to 55°C
Humidity Range5%–95%5%–95%
Altitude<2000m<2000m
Battery Cooling MethodLiquid coolingLiquid cooling
PCS Cooling MethodIntelligent coolingIntelligent cooling
Multiple Units in ParallelSupportedSupported

Grid Connection Data

  • Point-of-connection voltage
  • 11kV project interface requirements
  • Protection and metering requirements
  • Medium-voltage switchgear arrangement

Power and Energy Requirement

  • Required MW charge and discharge power
  • Required MWh energy capacity
  • Target storage duration
  • SOC reserve and operating window

EMS and Communication

  • Project control strategy
  • Battery and PCS operating visibility
  • Communication protocol requirements
  • Local and remote integration requirements

Site and Environment

  • Ambient temperature and altitude
  • Container and equipment layout
  • Transport and lifting access
  • Operation and maintenance clearance

From 1331V Battery Energy to an 11kV Grid Connection

The technical value of this 5MW BESS is visible in its complete electrical path. Battery containers, power conversion and voltage transformation are matched around one grid-connected system architecture.

Battery Container Cluster 10MWh with 2 battery container modules or 20MWh with 4 battery container modules. 1331V nominal battery platform
5MW PCS Power-conversion path between the high-voltage battery system and the AC side. 1000–1500Vdc · 690Vac · 4180A
5500kVA Transformer Matches the 690Vac low-voltage side to the specified high-voltage grid interface. 690Vac LV · 11kV HV
11kV Project Grid Interface Medium-voltage connection requirements are coordinated with project protection, metering and switchgear design. Project grid connection
AINEGY 5MW 10MWh 20MWh Grid-Connected BESS 1331V battery 5MW PCS 5500kVA transformer 11kV grid system operation diagram

Grid Charging and Battery Discharge Through One Power Conversion Path

A grid-connected BESS must support energy movement between the battery system and the project grid. The AINEGY architecture connects the 1331V battery platform to the 5MW PCS, 690Vac AC side and 5500kVA transformer interface.

Grid Charging Grid-side electrical energy passes through the transformer and PCS conversion path to charge the battery system according to the configured operating strategy.
Battery Discharge Stored battery energy passes through the PCS AC conversion path and transformer to the project grid interface.
EMS Visibility EMS provides operating visibility across the connected system interfaces and supports configured system coordination.
Project Grid Interface Final protection, metering and medium-voltage switchgear requirements are coordinated according to the project and local grid connection conditions.

Two Operating Directions, One Grid-Connected BESS Architecture

The product should be understood as an energy storage power system rather than a one-way battery output device. Charging and discharging use the connected battery, PCS, transformer and grid interfaces in opposite energy-flow directions.

Charging Direction

11kV Grid to Battery Energy Storage

11kV Grid → 5500kVA Transformer → 690Vac → 5MW PCS → Battery System

The grid-side path supplies energy through the voltage-transformation and power-conversion stages before energy is stored in the battery system. EMS coordinates operation according to the configured project strategy and operating limits.

Discharging Direction

Battery Energy Storage to the 11kV Grid

Battery System → 5MW PCS → 690Vac → 5500kVA Transformer → 11kV Grid

Stored energy passes through the 5MW PCS conversion path and the 690Vac-to-11kV transformer interface before reaching the configured grid connection point.

5MW PCS and 5500kVA Transformer Matching for 11kV Grid Projects

PCS power and transformer matching define the conversion path between battery energy and the medium-voltage project grid. The AINEGY system specifies a 5MW PCS and a 5500kVA transformer with 690Vac low-voltage and 11kV high-voltage sides.

5MW

PCS Power

Shared power-conversion class for both 10MWh and 20MWh battery configurations.

1000–1500Vdc

PCS DC Range

High-voltage DC operating range for the battery-side power-conversion path.

690Vac / 4180A

PCS AC Interface

Defined AC-side voltage and current parameters for the 5MW PCS platform.

5500kVA / 11kV

Transformer Interface

Voltage transformation from the 690Vac low-voltage side to the specified 11kV high-voltage side.

AINEGY EMS Monitoring and Grid-Connected System Coordination

The 5MW power path creates several connected operating interfaces. AINEGY EMS provides system-level operating visibility and supports dynamic control according to current system conditions and the configured project strategy.

AINEGY EMS Monitoring & System Coordination
Battery StatusEnergy and operating condition
BMS StatusBattery management visibility
PCS Status5MW conversion operation
System PowerConnected power flow
Grid InterfaceProject operating status
AlarmsOperating event visibility
RS485Communication interface
WiFiCommunication interface
EthernetNetwork integration

Operating Visibility Across the Connected Energy Interfaces

AINEGY EMS observes the operating status of connected system interfaces and coordinates system operation according to the configured control strategy. The system architecture combines EMS with BMS and PCS operation instead of treating each device as an isolated component.

Battery Visibility Observe battery-system operating status through the connected BMS and system communication architecture.
PCS Operating Status Follow the power-conversion interface that connects the battery system to the 690Vac AC side.
System Power Flow Maintain visibility of grid charging and battery discharge operation across the connected system.
Configured Strategy Dynamic control is implemented according to project operating conditions and the configured energy-management strategy.

Liquid Cooling for 10–20MWh Battery Thermal Consistency

In a high-capacity grid-scale BESS, thermal management is a battery-system operating consideration. Liquid cooling provides a direct thermal-management path across the battery architecture during repeated grid charging and discharging.

Battery Thermal ConsiderationAirflow-Based Thermal ManagementAINEGY Liquid-Cooled 10–20MWh BESS
Heat-transfer path Relies more heavily on conditioned airflow and internal air distribution. Uses liquid cooling to create a direct thermal-management path around the battery system.
High-capacity architecture Air circulation paths must be considered across a dense battery arrangement. Applied to 10MWh and 20MWh battery configurations within the AINEGY platform.
Repeated operation Thermal behavior depends strongly on airflow distribution and duty conditions. Designed to support thermal consistency during repeated grid charging and battery discharge.
Battery operating conditions Air distribution can influence thermal conditions across battery areas. Liquid cooling supports more consistent battery operating conditions across the high-capacity system.
System objective Maintain acceptable battery and enclosure operating temperatures. Support high-capacity battery integration and predictable thermal-management conditions.

Battery Protection and Fire Protection Architecture

The product specification identifies IP65 for the battery protection rating and confirms a fire protection system. These functions sit alongside BMS monitoring, liquid cooling and system communication within the battery energy storage architecture.

Battery Protection

IP65 Battery Protection Rating

IP65 applies to the battery protection rating stated in the product specification, not automatically to every external system component.

BMS

Battery Management as a Core System Layer

BMS is integrated into the product architecture to support battery-system operating visibility and management.

Fire Protection

Fire Protection System Included

The product specification confirms a fire protection system. Final project fire-protection requirements should be coordinated during engineering.

Thermal Management

Liquid-Cooled Battery Architecture

Battery thermal management is handled through liquid cooling, while PCS cooling is specified as intelligent cooling.

Factory Integration and System Interface Validation

A high-end 5MW BESS should be evaluated as a connected electrical system. AINEGY focuses on battery-system operation, BMS communication, PCS response, EMS visibility and the interfaces that link energy storage to the transformer and grid-side architecture.

Battery + BMS

Battery-System Operating Checks

Review battery-system operation and BMS communication within the high-capacity storage platform.

5MW PCS

Power-Conversion Interface Review

Check PCS operating response and communication across the DC and 690Vac power-conversion interfaces.

EMS

System Operating Visibility

Verify communication paths used by EMS to observe connected operating status and coordinate the configured strategy.

Transformer Interface

690Vac to 11kV Matching

Review the PCS AC interface and transformer voltage path within the project electrical architecture.

Quality Built Through System-Level Engineering

Battery capacity alone does not define a utility-scale BESS. The connected interfaces between the battery system, PCS, EMS, transformer and project grid determine how the complete energy storage system is engineered.

System Architecture 10–20MWh battery storage, 5MW PCS and 11kV transformer matching are organized as one connected power path.
Interface Validation System checks focus on the operating and communication interfaces connecting the major energy-storage subsystems.
Project Engineering Final configuration should be based on grid voltage, power, energy duration, communication, protection and site conditions.
Operating Communication RS485, WiFi and Ethernet provide the specified communication interfaces for system integration.

Multi-Unit Parallel Expansion for Larger Grid-Scale BESS Projects

The product information states that multiple units can operate in parallel. This gives project engineers an expansion path when a single 5MW power block or 10–20MWh battery configuration does not meet the total project requirement.

Power Requirement

Scale Beyond One 5MW Power Block

Parallel project architecture can be considered when total system power exceeds one 5MW configuration.

Energy Requirement

Build Higher Total MWh Capacity

Multiple systems can be coordinated when project energy capacity extends beyond one 10MWh or 20MWh system.

EMS Coordination

Coordinate Multi-Unit Operating Status

Communication and EMS strategy should be engineered around the connected system architecture and project operating requirements.

MV Engineering

Review the Complete Grid Interface

AC bus, protection, metering, transformer arrangement and medium-voltage grid connection require project-level engineering.

Applications for AINEGY 5MW/10–20MWh Utility-Scale Grid-Connected BESS

Designed for MW/MWh-level projects where large battery capacity, 5MW power conversion and medium-voltage grid connection form part of the project electrical architecture.

AINEGY 5MW 10MWh 20MWh utility-scale Grid-Connected BESS applications for grid-side storage renewable integration industrial parks mines and large energy projects
Grid-Side Energy Storage

MW-Level Battery Storage for Grid-Connected Projects

Grid-side projects require clear coordination between battery energy, PCS power and the project medium-voltage interface.

AINEGY connects 10–20MWh battery capacity to a 5MW PCS and 11kV transformer path within one project-oriented architecture.

Renewable Energy Integration

Project-Level Storage for Renewable Generation

Solar and wind projects can require large grid-connected battery storage as part of the wider AC project architecture.

The 5MW BESS platform provides a defined battery, PCS and transformer path for utility-scale energy storage integration.

Industrial Parks

10–20MWh Storage for Large Industrial Energy Systems

Industrial parks may operate substantial electrical loads and require MW-level storage within the site energy architecture.

The 10MWh and 20MWh configurations give project engineers two energy-capacity options around a common 5MW PCS platform.

11kV Distribution Projects

Defined 690Vac-to-11kV Power Path

Projects with an 11kV interface require PCS and transformer parameters to be coordinated with the wider electrical design.

AINEGY specifies 690Vac PCS output and 5500kVA transformer matching to an 11kV high-voltage side.

Mines & Oilfields

Large Energy Storage for Grid-Connected Industrial Infrastructure

Large extraction and energy sites may combine substantial electrical demand with project-specific grid and distribution infrastructure.

The 5MW power class and 10–20MWh battery range support evaluation for large grid-connected industrial storage projects.

Large EPC Energy Projects

A Defined BESS Power Block for Project Engineering

EPC and system-integration projects need clear battery, PCS, transformer and communication boundaries.

AINEGY provides a defined 5MW power-conversion and 10–20MWh battery platform for project configuration and multi-unit expansion.

5MW Utility-Scale BESS Engineering FAQ

Clear answers to the technical questions that project developers, EPC teams and energy-system engineers commonly need before selecting a 10MWh or 20MWh grid-connected battery energy storage system.

What is the AINEGY 5MW/10–20MWh Grid-Connected BESS Integrated Cabin?

It is a utility-scale grid-connected battery energy storage platform available in 5MW/10MWh and 5MW/20MWh configurations. The system combines battery containers, BMS, 5MW PCS, EMS, liquid cooling, fire protection, 5500kVA transformer matching and an 11kV grid connection path.

What is the difference between the 5MW/10MWh and 5MW/20MWh configurations?

Both configurations use a 5MW PCS platform. The 10MWh model uses two battery container modules, while the 20MWh model uses four battery container modules and provides twice the nameplate battery energy.

Is the PCS power 5MW for both BESS configurations?

Yes. Both the 10MWh and 20MWh configurations specify 5MW system PCS power, a 1000V to 1500V DC range, 690Vac AC voltage and 4180A AC current.

How does energy flow between the battery system and the 11kV grid?

The 1331V battery platform connects through the 5MW PCS power conversion path. The PCS operates on a 1000V to 1500V DC range and 690Vac AC side. A 5500kVA transformer matches the 690Vac low-voltage side to the 11kV high-voltage grid connection.

What does AINEGY EMS monitor in the grid-connected BESS system?

AINEGY EMS provides operating visibility across connected system interfaces and can observe battery status, PCS operating status, system power flow, communication status and grid-side operating conditions according to the configured project control strategy.

Why use liquid cooling in a 10MWh or 20MWh BESS?

Liquid cooling provides a direct thermal-management path across the high-capacity battery system and is designed to support more consistent battery operating conditions during repeated grid charging and discharging.

Does the battery system have IP65 protection and fire protection?

The product specification lists IP65 for the battery protection rating and confirms a fire protection system. Project fire-protection and site integration requirements should be reviewed during engineering.

Can multiple 5MW BESS systems operate in parallel?

Yes. The product information states that multiple units can be used in parallel. The final power architecture, EMS coordination, protection, communication and medium-voltage grid interface should be engineered for the specific project.

Configure Your 5MW/10–20MWh Grid-Connected BESS with AINEGY

Send the required MW power, MWh energy capacity, target storage duration, grid voltage, point-of-connection requirements, protection and metering requirements, communication protocol, operating strategy, ambient conditions and site layout. AINEGY will review the 10MWh or 20MWh battery configuration, 5MW PCS platform, 5500kVA transformer matching, EMS integration and multi-unit expansion requirements.