HiHELIOS Develops Hybrid Battery System for Renewable Energy Integration

The EU-funded HiHELIOS project is developing hybrid battery systems to improve renewable energy integration across Europe. Launched on October 6, 2025, the project aims to create modular systems at Technology Readiness Level 7, ensuring a more reliable electricity supply as Europe transitions to climate neutrality. The project addresses the increasing demand for grid flexibility by combining different energy storage technologies. HiHELIOS integrates high-energy storage, utilizing second-life Nickel Manganese Cobalt (NMC) battery modules from electric vehicles, with high-power storage using Lithium Iron Phosphate (LFP) batteries or supercapacitors. This hybrid approach seeks to improve performance, extend battery lifespan, and reduce environmental impact compared to single-technology solutions. A multi-layered control architecture, incorporating an Energy Management System (EMS), Power Management System (PMS), and Battery Management System (BMS), manages operational efficiency. The project will implement and validate its technology through four use cases in Norway, Belgium, and Greece. These demonstrations will address specific grid challenges and aim to prove the performance and reliability of the hybrid systems, paving the way for wider industrial adoption of the technology.