Optimum autonomous photovoltaic solution for the Greek islands on the basisof energy pay-back analysis

Although autonomous photovoltaic (PV) systems are identified as renewable energy technologies able to satisfy the electrification needs of remote consumers, they are strongly accused of their life-cycle energy requirements. To support the specific systemsʹ sustainable character one should be able to ensure minimum period of energy pay-back. In this context, an optimum sizing methodology is developed for stand-alone PV-battery systems in order to obtain configurations of minimum energy content. The proposed methodology is applied to three representative islands across the Greek territory and the results obtained are favourably compared with the up to now – commonly used – diesel-electric generator solution.