Leveraging 12 years of energy storage expertise, Cubenergy has announced the launch of FlexCombo 2.0, a next-generation flexible energy storage AC Block designed to support the evolving requirements of power systems, including grid stability, regulatory compliance, and scalable project development.
Standardised Architecture for Scalable Projects
Energy storage projects in Europe typically involve long development timelines, complex permitting procedures, and evolving grid code requirements.
FlexCombo 2.0 AC Block adopts an AC/DC all-in-one design, integrating batteries, battery management systems (BMS), power conversion systems (PCS), and fire protection into standardised cabinets.
The system supports 2-hour and 4-hour configurations and can be expanded to 8MW/16MWh. According to Cubenergy, this approach enables project developers and asset owners to optimise initial investment while retaining flexibility for future capacity expansion.
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Standardised interfaces and reserved space for expansion allow capacity upgrades without major redesign, aligning with European project financing and phased investment models. This means asset owners and investors can break free from upfront CAPEX constraints, expand in response to market demand, scale in line with growth opportunities and invest as needed.
Grid-Forming Capability Aligned with Global Grid Codes
FlexCombo 2.0 AC Block is equipped with Cubenergy’s proven grid-forming (GFM) technology. The system supports functions such as inertia provision, continuous high- and low-voltage fault ride-through, short-circuit current contribution, fast frequency response, dynamic reactive power control, and black start capability.
FlexCombo 2.0 is designed to comply with key European and UK grid codes, including EN 50549-1/-2/-10, VDE 4110, VDE 4120, VDE 4130, and G99, with configurable parameters to meet national and regional requirements.
Cubenergy has deployed GFM energy storage systems since 2018, including projects in weak-grid regions. Since 2021, the company has delivered several hundred megawatts of grid-forming BESS worldwide.
Designed for Strictest Logistics and Site Conditions
FlexCombo 2.0 has obtained major international certifications, including CE marking, as well as UL 9540A and IEC62933 certification.
Each FlexCombo 2.0 energy block weighs approximately 8 tons, is compatible with standard transport equipment, and is designed to meet common road transportation constraints. Featuring Cubenergy’s PowerSkid, the system can be installed on level ground using a portable installation module, reducing the need for concrete foundations and heavy civil works.
According to Cubenergy, this design simplifies installation, shortens construction schedules, and reduces on-site risks, particularly for projects located in remote or infrastructure-constrained areas.
Safety & Availability
Safety and long-term availability are core design principles of FlexCombo 2.0. The system incorporates a multi-layer safety concept aimed at preventing the spread of exhaust gases, heat transfer, and thermal runaway propagation.
FlexCombo 2.0 has achieved safety certifications and is equipped with an intelligent thermal management system enabling operation in –30 °C ~ +50 °C environment.
Cubenergy conducts full-scale environmental and functional testing to validate performance under extreme conditions and combines test data with its global service network to support system operation throughout the project lifecycle.
Supporting Global Applications
With increasing demand for grid-supportive energy storage, FlexCombo 2.0 is positioned for applications such as renewable integration, frequency regulation and other ancillary services, industrial decarbonisation, and AI data centre power systems.
To learn more, visit www.cubenergy.com.
