Large Scale Energy Storage System

Utility-Scale & Large-Scale Battery Energy Storage Systems (BESS)

1.2MWh to 5MWh Containerized ESS — Factory Direct, Globally Certified

Whether you need a single 1.2MWh containerized unit or a 100MWh+ utility-scale BESS array, SolarEast's engineering team is ready to deliver a free customized system design, technical proposal, and competitive factory-direct quote.  

Home > Products > Large Scale Energy Storage System

[Tier 1 Cells] | [Liquid-Cooled Tech] | [6S Safety System] | [8,000+ Cycles]

Turnkey MWh-Scale Energy Storage for Utility, Grid, Solar Farm & Industrial Microgrid Projects

SolarEast BESS provides high-density, containerized storage solutions from 1.2MWh to 5MWh+. Engineered with advanced liquid cooling and 314Ah Grade A cells, our systems ensure grid stability, renewable integration, and maximum ROI for global energy projects. Engineered for industrial, commercial, and utility-scale applications. 


✔ 1.2MWh / 2MWh / 3.34MWh / 5MWh — Full Capacity Range 

✔ Liquid-Cooled Architecture — 8,000+ Cycles, 15+ Year Service Life 

✔ UL9540 | UL1973 | IEC 62619 | CE | CB Certified 

✔ Grid-Tied & Off-Grid | AC & DC Coupling 

✔ OEM / ODM / EPC One-Stop Service 

✔ 22GWh Annual Production Capacity | Factory Direct Pricing


Designed to support EV charging stations, manufacturing plants, factory energy management, peak shaving, load shifting, and microgrid applications, our commercial and industrial energy storage systems help enterprises significantly reduce energy costs and improve power stability. Both liquid-cooled and air-cooled BESS configurations are available, delivering optimized thermal management and maximum system efficiency under demanding operating conditions.


Get a quote for an energy storage system


Why Choose Our Large Scale Battery Storage Solutions

As a leading BESS manufacturer and factory-direct energy storage supplier with over 10 years of experience in lithium battery energy storage, we offer customized MWh battery solutions, OEM/ODM services, and one-stop energy storage integration, trusted by large enterprises and global manufacturing groups. Our solutions are widely deployed in containerized BESS, peak shaving storage systems, and large-scale industrial energy storage projects worldwide.


Request a free technical proposal or quote today and optimize your industrial energy strategy with our smart BESS solutions.


Obtain the specification sheet


Browse Our Large-Scale BESS Product Line From modular 1.2MWh grid-edge storage units to high-density 5MWh utility containerized systems, every SolarEast large-scale ESS is built on our proven liquid-cooled LiFePO4 platform — pre-integrated, pre-tested, and ready for rapid deployment anywhere in the world. Select the capacity that fits your project requirements below, or contact our engineering team for a customized MWh-scale proposal.

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1.2 MWh Energy Storage System Container

The SolarEast 1.2MWh containerized BESS delivers reliable MWh-scale energy storage for commercial microgrids, industrial parks, and grid-edge peak shaving projects. All-in-one liquid-cooled design integrates LiFePO4 battery packs, PCS, EMS, BMS, and fire suppression in a single ISO-standard container. Scalable, UL9540-certified, and available for OEM/ODM. 


Key specs:   

1.2MWh | Liquid-cooled

LiFePO4 | Grid-tied & off-grid

IP55 | UL9540 / IEC 62619

1.2 MWh Energy Storage System Container

2MWh BESS Container System

Purpose-built for utility developers and large industrial operators, the SolarEast 2MWh containerized battery energy storage system delivers 1MW rated power with 2.089MWh total capacity in a compact, pre-assembled unit. A 34.5% improvement in energy density over previous-generation systems ensures maximum storage per square meter on constrained project sites.


Key specs:

2MWh | 1MW rated power

314Ah LiFePO4 | Liquid-cooled

UL9540 / CE

2MWh BESS Container System

3.34 MWh Containerized Energy Storage System

The SolarEast 3.34MWh platform sets the benchmark for high-density utility-scale BESS. Engineered for mega-efficient performance, this next-generation containerized ESS delivers ultra-low LCOS (Levelized Cost of Storage), rapid deployment, and seamless grid integration for solar farms, wind + storage hybrid projects, and large-scale industrial energy management. 


Key specs:

3.34MWh | Ultra-high density

Liquid-cooled LiFePO4 | Grid-forming ready

UL9540 / IEC 62619

3.34 MWh Containerized Energy Storage System

5.015 MWh Energy Storage System Container

SolarEast's 5MWh containerized BESS is the flagship solution for utility-scale developers, IPPs, and grid operators requiring maximum capacity per container footprint. Designed for multi-unit parallel deployment to 10MW, 20MW, and beyond, it is the cornerstone of large-scale grid stabilization, frequency regulation, renewable energy time-shifting, and demand response programs. 


Key specs:

5MWh | Multi-unit scalable

High-voltage architecture | Liquid-cooled

UL9540 / CE / CB

More Power in Less Space

5.015 MWh Energy Storage System Container

Solutions

Utility Scale Energy Storage Solutions

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Empower the Grid with SolarEast BESS. Scalable 1.2MWh to 5MWh+ liquid-cooled containers designed for grid stability, renewable integration, and maximum ROI. Our industrial and commercial energy storage systems including small integrated energy storage and large customized energy storage solutions, which are widely used in microgrids, off-grid power supply, peak cutting and valley filling, demand side management and backup power.

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Commercial & Industrial Storage System Solutions

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SolarEast BESS is a supplier of lithium iron phosphate batteries, microgrid energy, large-scale battery storage, grid-scale energy storage, high-voltage energy storage batteries, and energy storage solutions. SolarEast BESS provides tailored 30kWh to 522kWh+ solutions for factories, malls, and data centers. Optimize energy use, ensure backup power, and achieve 24/7 grid resilience with advanced liquid-cooled technology.

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Residential Energy Storage System Solutions

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SolarEast's residential energy storage system, designed for homes, villas, sunrooms, and communities, stores solar energy to reduce power bills and ensure reliable day-and-night energy use.

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Why Choose Us

Manufacturing Strength

Advanced production facilities,energy storage battery annual output of 22GWh.

22GWh

annual output

R&D Capabilities

Continuous innovation in energy storage technology,with 1,140 patents.

1140

patents

Quality Assurance

Comprehensive testing and certifications,support CE, TUV, IEC and other professional certification.

CE, TUV, IEC

certification

Customization Expertise

We provide professional and flexible OEM/ODM services.

OEM/ODM

We Will Serve You The Best Products With The Favorite Prices

SolarEast business scope covers the global market. It has formed strategic partnerships with many famous brands worldwide, and has exported to more than 100 countries, including the United States, Canada, the United Kingdom, Germany, Australia, the Philippines, Lebanon, etc. SolarEast energy storage has passed the global mainstream certification, in line with the North American UL9540, UL1973, European CB/CE, and Italian CEI-021 standards.

With SolarEast, you can benefit from:

One-Stop Service

Full support from needs assessment and system design to installation and maintenance

Efficient Storage Solutions

Lower energy costs and enhance energy utilization

Smart Management

Enable peak shaving, load shifting, and backup power functionalities

Renewable Integration

Seamlessly integrate solar, wind, and other renewable energy sources for a sustainable future

FREE Request a Quote! Fill out the form to connect with us and start your energy storage journey today!

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