During November 2025, Matthias Grueter delivered Enphase IQ Battery support for the evcc-io/evcc repository, expanding the platform’s hardware compatibility. He implemented a new parameter to model battery types and updated the backend data rendering logic to accurately reflect the selected battery, enhancing user experience for Enphase IQ battery users. The work involved backend development in Go, API integration, and configuration using YAML, focusing on precise parameter modeling and seamless data flow. While no bugs were addressed during this period, Matthias’s contribution provided a targeted feature that improved adoption potential and usability for users integrating Enphase IQ batteries with evcc.