AlphaESS Aster 5000 

Liquid Cooling 5MWh BESS Solution

Reliable energy storage solutions for grid and commercial power needs.

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Driving Europe's Energy Transition with Over a Decade of Proven Expertise

Global Expertise, Local Impact

AlphaESS is a global leader in advanced energy storage solutions, with over a decade of proven success across Europe. From homes to grid-scale projects, our solutions cover all storage needs. Combining cutting-edge technology with local service, we help customers accelerate the energy transition and achieve their sustainability goals.

* InnoSolveGreen PV+Storage Project – Lithuania
6 MWh liquid-cooled BESS by AlphaESS deployed for Green Genius, enabling efficient renewable integration and grid resilience.

Key Reasons to Choose the AlphaESS Aster 5000

Longer lifespan, Lower Maintenance, Higher Returns

AlphaESS adopts industry-leading bi-directional active balancing technology, delivering 23× higher balancing efficiency compared to traditional solutions.  Among various active balancing technologies on the market, AlphaESS stands out with superior performance. This innovation extends battery life by 10%+, enhances system stability,  and significantly reduces maintenance costs—ensuring long-term value and reliability for every project. 

High Integration, Compact Design – Save Space, Cut Costs, Deploy Faster

Ultra-High Capacity: Powered by in-house 314Ah cells, Aster 5000 packs up to 5.0159 MWh into a single 20-ft container—35% more capacity than the previous generation. 

Smaller Footprint: Single-door access and back-to-back design reduce land use by 40%, while slashing transportation costs. 

Advanced Cooling & Auto Refilling for Near-Zero Maintenance 

Precise thermal control, preventing overheating - Intelligent auto

refilling, no manual maintenance 

Stable performance, lower O&M costs 

Comprehensive Safety Architecture 

Thermal Protection - Aerosol fire suppression inside battery pack  Aerogel Cell-to-cell insulation  Multil-layer firefighting system: Smoke, gas, temperature detectors,aerosol and Sprinkler  Explosion relief panel on top, NFPA68 compliant Electrical Safety  Multi-level fusing to prevent short-circuits  Active dehumidification keeps the interior dry and safe  

Comprehensive Services That Power Your Success

On-Site Commissioning

AlphaESS offers comprehensive on-site support for the Aster 5000 – from project planning and installation to commissioning, training and maintenance.  

Operational and maintenance support 

With professional technical training, fast-response troubleshooting, and efficient spare parts management, AlphaESS keeps your system running reliably and at peak performance. 

Local support 

With over 40 subsidiaries and more than 300 service points worldwide, lphaESS delivers timely, localized, and multilingual service wherever you are. 

Why Choose Aster 5000 BESS?

Advanced Battery Balancing for 10% Longer Life

With industry-leading active balancing technology, Aster 5000 BESS boosts efficiency 23× over traditional systems, dramatically reducing maintenance needs, extending system life by over 10%, and unlocking greater long-term ROI.

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All-in-one Integrated 5MWh Liquid-Cooled BESS

Aster 5000 delivers up to 5 MWh in a compact 20-ft container, 35% more capacity than the previous generation. Its all-in-one design integrates battery modules, PCS, EMS, and thermal management, while the single-door, back-to-back layout reduces land use by 40% and accelerates on-site deployment.

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5-Year Maintenance-Free with Auto-Refilling Liquid Cooling

Intelligent liquid cooling combined with automatic refilling ensures precise temperature control and hands-off operation for up to 5 years. This minimizes manual servicing, lowers O&M costs, and guarantees stable system performance in diverse operating conditions.

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Full-Spectrum Safety from Cell to System

From aerosol fire suppression to aerogel insulation and NFPA68-compliant pressure relief, Aster 5000 battery energy storage system integrates full-spectrum safety at the cell, pack, and system level.

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Built to Perform. Ready for Any Environment.

Aster 5000 BESS Certifications

Technical Specifications

  • System Parameters

  • Battery Parameters

Dimensions (W x D x H)

20 ft (6,058 x 2,438 x 2,896 mm)

System Weight

43 t

Nominal Capacity

5,015.9 kWh

Battery Chemistry

LFP (LiFePO4)

Rated Power (Charge/Discharge)

2,507.9 kW (0.5 P)

BMS Balancing Type

Active Balancing

Ingress Protection

IP55

Noise Level

<75 dB @ 1m

Fire Protection System

Aerosol + Sprinkler

Cooling Method

Liquid Cooling

Aster 5000 Datasheet

Nominal Voltage

332.8 V

Nominal Capacity

104.4 kWh

Nominal Charge/Discharge Power

52.2 kW (0.5 P)

Ingress Protection

IP67

Operating Temperature Range

-40 °C ~ 50 °C*

Weight

670 kg

Dimensions (W × D × H)

790 x 2.210 x 245 mm

*The recommended operating temperature range is 15–35 °C. Extreme ambient temperatures may impact battery performance.