Assessment of Storage Ageing in Different Types of PV Systems: Technical and Economical Aspects

Abstract

Successful implementation of storage within PV systems requires a reliable life time estimation, to ensure the economical profitability of projects and, not negligibly, the user satisfaction. However, the main difficulty is that among the different components of a PV system, the storage part is one of the shortest lived, and whose life time is the most difficult to predict. In this paper, the methodology for assessing the storage ageing is described for stand-alone systems, first for technical aspects dealing with accelerated ageing tests, then for economical aspects with the comparison of storage cost of ownership. Finally, we examine how this approach can be transposed to the case of storage in grid-connected systems.