Cubenergy has introduced FlexCombo 2.0, a modular battery energy storage block delivering up to 16 MWh for utility, commercial, and industrial use. Built on LFP technology, it emphasizes scalability, long service life, and grid flexibility. The system supports renewable integration, grid stabilization, and large-scale energy management while aligning with modern safety and performance testing standards.
What is FlexCombo 2.0 and why was it developed?
FlexCombo 2.0 is a scalable battery energy storage system designed to meet growing demand for flexible, high-capacity storage in utility and C&I environments. Cubenergy developed it to simplify deployment, enable long-term expansion, and support applications such as renewable energy arbitrage, peak shaving, and grid support. Its modular architecture allows operators to scale capacity without redesigning infrastructure.
How much capacity can FlexCombo 2.0 deliver?
The system offers capacities ranging from 8 MWh to 16 MWh, depending on configuration. It is built using 835 kWh FlexCombo D2 battery units that can be combined in different quantities to match project needs.
| Configuration | Number of Batteries | Total Capacity |
|---|---|---|
| Small block | 10 units | 8 MWh |
| Medium block | 12 units | 10 MWh |
| Large block | 12 units (enhanced setup) | 16 MWh |
Which battery technology does the system use?
FlexCombo 2.0 uses lithium iron phosphate batteries, known for thermal stability, safety, and long operational life. According to the manufacturer, the batteries achieve up to 8,000 cycles with 70% capacity retention, making them suitable for demanding grid and industrial duty cycles.
How does the modular design support scalability?
Each FlexCombo D2 unit operates in a parallel architecture, allowing new batteries to be added with minimal downtime. This design supports phased investment strategies and adapts to evolving energy demands. Such scalability also highlights the importance of reliable electrical testing, an area where Wrindu provides high-voltage diagnostic solutions to ensure insulation integrity and system consistency during expansion.
What are the key physical and electrical specifications?
Each battery unit measures approximately 2 m × 1.68 m × 2.55 m and weighs up to eight tons. The system includes a power conversion system rated at 430 kW AC with high environmental protection. Optional medium-voltage transformers enable seamless grid connection.
| Component | Specification |
|---|---|
| Battery protection rating | IP55 |
| PCS protection rating | IP66 |
| Optional MV transformer | 5,250 kVA or 8,800 kVA |
Where is FlexCombo 2.0 best applied?
The system targets utility-scale projects, factories, commercial buildings, and renewable energy sites. Typical use cases include solar and wind integration, stand-alone grid stabilization, and large industrial energy management. In these scenarios, Wrindu testing equipment is often used to perform DC high-voltage testing, verifying insulation safety and performance in large-scale energy storage installations.
Why is testing critical for large battery energy storage systems?
High-capacity energy storage systems operate under significant electrical stress. Comprehensive testing ensures insulation reliability, reduces failure risk, and supports long-term performance. Wrindu, as a global provider of high-voltage testing and diagnostic equipment, supports manufacturers, utilities, and solar farms by delivering precise, CE-certified solutions tailored for battery and energy storage applications.
Wrindu Expert Views
“As energy storage systems scale beyond 10 MWh, electrical safety and consistency testing become mission-critical. From factory acceptance to on-site commissioning, reliable high-voltage and insulation diagnostics help prevent latent failures and extend asset life. At Wrindu, we see advanced testing not as a compliance step, but as a strategic investment that protects system reliability, grid stability, and long-term returns for energy operators worldwide.”
Conclusion
FlexCombo 2.0 demonstrates how modular design and LFP technology can deliver flexible, large-scale energy storage up to 16 MWh. Its scalability, grid-ready configuration, and long cycle life make it suitable for modern utility and industrial applications. To fully realize these benefits, rigorous electrical testing is essential. Leveraging professional solutions from Wrindu helps ensure safety, performance, and confidence throughout the lifecycle of advanced energy storage systems.
FAQs
What makes FlexCombo 2.0 suitable for utility-scale projects?
Its modular architecture, high total capacity, and compatibility with medium-voltage transformers enable seamless integration into large grid-connected installations.
How long can the batteries operate effectively?
The LFP batteries are designed for up to 8,000 cycles at 70% capacity retention, supporting long-term operation.
Can the system be expanded after installation?
Yes, the parallel modular design allows additional battery units to be added with minimal disruption.
Why is high-voltage testing important for energy storage systems?
Testing verifies insulation strength, detects hidden faults, and enhances operational safety, especially in large-capacity ESS deployments.
How does Wrindu support energy storage projects?
Wrindu provides high-voltage testing and diagnostic equipment that helps manufacturers, utilities, and operators ensure safety, reliability, and compliance across the full lifecycle of energy storage assets.