PV Hybrid Systems are up to now individual solutions. This work presents a new approach to design such system significantly more flexible and compatible. Autonomous PV Hybrid Systems with 24V, 48V or 120V DC battery bus bar within a power range from 2kWp up to round about 100 kWp PV array and an inverter power of up to 72 kW in 230V AC three phase mode can be built very efficient with the new system technology. A considerable consortium of German companies and research institutes have developed this new step forward for PV Hybrid Systems. A strong separation between power flow and information flow allows standardized components communication. All components are connected to a standard bus. Through a standardized open source UESP protocol (Universal Energy Supply Protocol) a central Energy Management Unit controls all components within the system. Through a virtual stock market the energy management unit switches between several generators and controls the load.
Within this project the so called UESP bus has been defined. UESP compatible components have been developed and tested within an UESP laboratory in Germany. A field tests have been realized in Germany and Sri Lanka and will be presented as well.
With the help of innovative UESP system design and intelligent energy management strategies the overall performance and life time of PV Hybrid Systems can be improved significantly. World-wide all manufacturers of components for PV Hybrid systems are invited to participate in that open source communication standard.