AlphaESS has officially announced the launch of its latest product – Aster 5000, a next-generation 5MWh liquid-cooling energy storage system, fully integrated in a 20-foot container. Featuring a dual-core system with proprietary Active Balancing and liquid thermal management, it is designed to meet the growing global demand for safe, efficient and reliable long-duration energy storage.
Aster 5000 features 12 clusters, each comprising 4 modules that utilize high-performance 314Ah battery cells to deliver a 5MWh capacity at a 0.5C system rating. Weighing 42.5 tons and with an IP55 rating, it operates reliably in extreme conditions from -40°C to 50°C. Its innovative single-door design enables back-to-back installation, increasing power density by 35% and reducing footprint by 40% compared to the previous generation Aster 3720, significantly lowering land and infrastructure costs.
The product is among the first energy storage systems on the market to scale the use of AlphaESS’s proprietary Active Balancing technology. Unlike traditional passive systems, Active Balancing continuously and precisely redistributes energy between battery cells in real time, resulting in:
- Up to 23× faster balancing, ensuring optimal performance even under heavy grid loads
- 10% + longer battery lifespan
- Reduced energy loss and maximized usable capacity
- Lower maintenance and operational costs
In parallel, the system features a fully integrated liquid cooling thermal management platform with four intelligent operation modes: cooling, heating, circulation and automatic fluid replenishment. Additional features such as active dehumidification and low-noise fan design maintain operational noise levels, ensuring stable performance and a quieter project environment.
With safety as a top priority, the Aster 5000 is engineered to comply with major international standards, including IEC 62619 and 62933, UL 9540A and 1973 and NFPA68 and NFPA69. From smart monitoring to advanced fire protection, every detail is designed to safeguard a project:
- Real-time intelligent monitoring for temperature, smoke and gas — issues are spotted before they escalate
- Multi-stage aerosol fire suppression to stop thermal incidents in their tracks
- Explosion vents and emergency exhaust systems for rapid, controlled pressure relief
- Optional modular water-based fire protection for extra peace of mind in extreme environments
These features provide comprehensive protection for both assets and personnel, making the Aster 5000 suitable for deployment in even the most critical energy projects.
The product is expertly designed to accelerate the global shift toward renewable energy and long-duration storage. Its flexible architecture and broad compatibility make it ideal for 4 to 8+ hour discharge, grid peak shaving, frequency regulation, renewable energy integration and enhancing energy autonomy and resilience. Powered by AlphaESS’s proprietary BMS, Active Balancing and advanced thermal management, the Aster 5000 delivers a reliable and scalable solution for the future energy landscape.
In addition to product performance, AlphaESS provides comprehensive on-site support for Aster 5000 — from project planning and installation to commissioning, technical training and long-term maintenance.
O&M is backed by expert technical training, fast fault response and spare parts management, ensuring reliable system performance over the product’s entire lifecycle.
Leveraging its global presence, AlphaESS operates over 40 subsidiaries and maintains a network of more than 300 service centres worldwide. This extensive footprint guarantees timely, localized and multilingual support to meet the needs of customers wherever their projects are located.
