Michael Panzer contributed to the evcc-io/evcc repository by engineering backend features focused on scalable device management and reliable energy estimation. He refactored the LG ESS integration from a singleton to a map-based registry, enabling independent configuration and management of multiple LG ESS devices, which reduces cross-device configuration risks and supports scalable deployments. In a separate effort, he improved vehicle state of charge (SOC) estimation by ensuring a fresh estimator is initialized on every vehicle connection, addressing issues with stale state and enhancing charging session accuracy. His work leveraged Go, concurrency, and backend development principles to deliver robust, maintainable solutions.