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Aster TB250/TB500

Advanced BESS for C&I Energy Storage Solution

250-500 kW / 705-1410 kWh

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Quick Deployment for C&I Projects

Optimized design that accelerates deployment and reduces total EPC costs

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Dual 400V/800V PV Compatibility

Compatible with both 400V and 800V PV systems,the Aster TB250/TB500 BESS boosts solar energy use and cuts installation and labor costs by up to 20% without additional transformers.

Front-Access Cable Routing for Easy Deployment

Front-access electrical design simplifies layout planning, streamlines on-site work, and further reduces installation costs, especially in space-limited commercial and industrial sites.

Integrated 20ft All-in-One Container Design

A complete All-in-One solution that significantly shortens construction timelines. Pre-assembled, pre-tested, and ready for rapid deployment to accelerate project delivery.

Cell-to-System Protection with Independent Fire Protection

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  • Independent Fire System

  • UL9540A Certified

  • Cell and Module Safety

  • Cabinet and System Protection

Standalone fire-control host delivers professional, autonomous, and reliable protection across the entire energy storage system.

Pack-level UL9540A certification ensures industry-leading fire safety and verified compliance for commercial and industrial BESS applications.

Aerogel insulation and module-level aerosol fire suppression with multi-stage detection provide fast and effective thermal protection from cell to module.

Electrical MSDs, fuses, and built-in dehumidifiers maintain safe, stable, and reliable operation at the system and cabinet level.

Easy Maintenance and Reliable Performance

Smart Liquid Cooling System

The Aster TB250/TB500 commercial and industrial BESS uses an intelligent liquid-cooling system that ensures stable thermal management and supports long-term, reliable operation with simplified maintenance.

Flexible Parallel Expansion

The Aster TB250/TB500 commercial and industrial BESS supports parallel connection of up to 6 units, allowing projects to scale efficiently up to 3 MW / 8.46 MWh while maximizing system capacity and operational flexibility.

Intelligent BMS for Maximum Performance and Longevity

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Active Cell Balancing

Maintains consistent battery cells to maximize capacity and extend cycle life.

Multi-Level Pack Control

Balances packs and modules for efficient, reliable commercial and industrial BESS operation.

Smart Cloud Platform: 

Real-time monitoring and remote diagnostics ensure intelligent system management.

Power Solutions for Factories and Solar Plants

Large PV Power Plants

The Aster TB250/TB500 BESS seamlessly connects to 400V or 800V PV systems, storing excess solar energy, reducing curtailment, and improving overall plant revenue with fast deployment and reliable liquid-cooled operation.

Large Industrial Factories

For factories, the system provides stable power, peak shaving, and capabilities, while intelligent BMS and modular design ensure efficient energy use, reduced downtime, and long-term maintenance-free operation.

Proven Performance in Real Projects

Discover how AlphaESS delivers reliable, scalable, and high-efficiency energy storage through successfully deployed commercial and industrial projects worldwide, demonstrating proven performance across diverse real-world applications.

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Comprehensive Support for Your Energy Storage Projects

AlphaESS Aster TB250/TB500 Specification Sheet

  •   System Parameters

Model

Aster TB500-EX01

Battery Chemistry

LFP (LiFePO4)

Nominal Capacity

Max. 1410.7 kWh per Container

Nominal Power

250 - 500 kW

Dimensions (W xD xH)

6058 x2438 x2896 mm

Battery Cluster Connection

Max. 6 Clusters in Parallel

Weight

23 t

Ingress Protection

IP55

Battery Cooling Method

Liquid Cooling

Operating Temperature Range

-20 °C – 50 °C *

Rated Voltage

400 V/800 V

*The optimum temperature range is 15~30℃. If the ambient temperature is too high or too low, the battery performance may deteriorate.

Aster TB250/TB500 Datasheet

frequently asked questions

Find answers to common questions about the Aster TB250/TB500 commercial and industrial BESS, including installation, operation, safety, and performance.

What is the product's application mode? What is the maximum number of units supported in parallel connection?

It is for grid-tied applications only. A maximum of 6 units can be connected in parallel.

What is the maximum charge/discharge power per container?

The maximum charge/discharge power for a single container is 500kW. The configuration can be reduced by using fewer PCS modules. Each power module is rated at 62.5kW.

Regarding IEC 62619, is the non-essential test item 7.3.3 performed?

This section pertains to cell-level testing and is not required at the system level.

Can the battery container color be customized?

The standard color is White (RAL9003, Signal white). Custom colors are possible with extra surcharge.

Is customized branding/logo on the container supported?

Yes. Please inform us in advance after placing the order and provide the logo in AI vector format.

Does it support frequency regulation applications?

In such case, 3rd party EMS and frequency acquisition is needed. When 3rd party EMS sends a dispatch command, Alpha's EMS completes the adjustment in about 1 second. 

What is the product's noise level?

The maximum noise level during full-power operation at a distance of 3 meters is ≤75dB.

How heavy is the battery? We need to calculate the recycling cost.

Each full battery module is  about 340kg, and each half module about 195 kg. One cluster consists of 4 full modules and 1 half module, so total cluster weight is about 1,555 kg.