Worked on enhancing the Zewotherm Lambda integration within the evcc-io/evcc repository, focusing on improving energy accounting accuracy and deployment flexibility for embedded systems. Developed support for handling negative excess energy values by introducing a polarity parameter and corresponding scaling adjustments, enabling more precise energy data processing. Additionally, replaced the previously hardcoded network port with a configurable option, simplifying deployment across varied network environments. The work leveraged Go and YAML for implementation, applying configuration management and Modbus protocol expertise. These enhancements improved interoperability and onboarding for Lambda-based charger integrations, addressing real-world deployment challenges with targeted, maintainable engineering solutions.