This research project aims to develop an innovative power system control and energy management system for solar PV hybrid systems, which generate electricity at the least cost at any given point-in-time, while ensuring grid stability and lowest loss of load probability (LOLP) levels. This will be achieved by developing innovative multi-objective optimisation algorithms, designing and implementing high-performance power electronic converters and applying leading-edge forecasting techniques on supply and demand side to minimise both diesel run-hours and battery size while maintaining grid stability and meeting the load at any time.