AlphaESS launched its STORION-LC-TB150 series C&I ESS at the show
According to the company, it features liquid-cooling thermal regulation for both storage and PCS, helping to achieve an operational noise level of ≤60 dB
This ESS is suitable for emergency backup, peak shaving, valley filling, VPP, and PV self-consumption, among others
AlphaESS. Co., Ltd., a solar-plus-storage system provider, introduced its latest cabinet-based liquid-cooled energy storage system (ESS), STORION-LC-TB150, at Intersolar Europe 2026. The product is targeted at commercial & industrial (C&I) and urban installations that require silent operation while maintaining expected performance levels. It is available in two models: Standard and Ultra.
The company highlighted the ESS's low operational noise level as a key feature, among others. It houses 6 battery packs in a 1,340 × 1,542 × 2,413 mm cabinet. Each battery pack has a capacity of 52 kWh. They are mounted on top of each other and are cooled 24/7 by a circulating liquid coolant without fans. Its built-in power conversion system (PCS) also employs a circulating liquid-cooling method. According to the company, this ‘integrated liquid cooling architecture’ keeps the operational noise level at ≤60 dB, which is comparable to normal human conversation. This attribute helps users install this ESS closer to large offices, commercial buildings, or factories without noise disturbances.
In terms of capacity, a single ESS unit is designed to meet at least 150 kW of the user’s connected loads. The six battery packs provide 313 kWh (6 × 52 kWh) of storage capacity, helping maintain full-load power for at least 2 hours at a 0.5P rate or up to the cut-off voltage. This AC-coupled storage system is designed for a guaranteed life of ≥8,000 (Standard) and ≥12,000 (Ultra) cycles (charging/discharging), while maintaining a round-trip efficiency (RTE) of > 90%.
These are capable of both grid-interactive energy management services (on-grid) and emergency backup applications and are controlled by a built-in energy management system (EMS). For the latter application, the system switches to off-grid mode within 20 ms of a grid outage via an external static transfer switch (STS) and delivers up to 150 kW of power through a dedicated backup port. During this time, the battery discharges itself at up to 90% depth of discharge (DoD). If user demand exceeds the daily scheduled load curve during peak hours, the EMS can command the storage to flatten the curve and avoid buying expensive electricity from the open market, a process known as peak shaving. It can also charge itself during low-demand periods when grid electricity prices are lower, a process called valley filling. This ESS, when AC-coupled with an existing PV plant, can maximize PV self-consumption by diverting excess PV generation to the battery after feeding real-time captive demands.
The system can also be configured to be able to support grid-interactive services beyond the user’s side. For this, the EMS can be embedded with the company’s latest software, AlphaConnect, which acts as a connectivity layer between assets and electricity markets. The company says that this platform provides open APIs to virtual power plant (VPP) aggregators or third-party system operators, enabling interoperability across devices and applications. The company cited a feature aimed at the UK: it ‘deeply’ integrates with one of Europe’s smart energy platforms, Octopus Energy. This feature helps users schedule battery charging and discharging and manage assets remotely.
These complex operations, which generate heat in real time, are controlled by the aforementioned liquid-cooling mechanism. It also enables the system to operate even in freezing ambient temperatures of -30°C or scorching heat of +50°C, while derating starts above 45°C. The safety aspect closer to business areas becomes critical, for which this system is equipped with a multi-stage fire protection system. In the event of a fire caused by faulty battery cells with internal thermal runaway, smoke fills the cabinet and is detected by internal smoke detectors. It also houses heat and flammable gas sensors for enhanced protection. Upon receiving fault signals from the smoke sensor, the aerosol-based chamber releases fine aerosol clouds that react chemically with smoke and fire, ultimately suppressing the fire.
