Worked on the evcc-io/evcc repository to enhance the robustness and reliability of energy calculation logic in backend systems. Focused on addressing edge cases where state-of-charge (SOC) data or solar rate forecasts were unavailable, implementing fallback mechanisms in Go to ensure the system returned zero energy instead of panicking. Expanded unit test coverage to validate these scenarios, reinforcing long-term stability and correctness of Loadpoint operations. Emphasized maintainability by using descriptive commit messages that referenced specific fixes, improving traceability for future development. The work centered on backend development and testing, resulting in more stable energy reporting and resilient data handling processes.