PSIebus is a depot and charging management system for E-bus fleets. It takes into account all necessary influencing factors and dependencies relevant for the efficient control, charging and dispatching of emission-free vehicles. Its modular system architecture and open interfaces make it scalable and future-proof. The system also uses standardized interfaces for data exchange, making it manufacturer independent. It manages vehicles with different drive types in parallel. The overall solution PSIebus ensures maximum vehicle availability and makes moving to new drive technologies fast, reliable and safe.