Mismatch between batteries and two module types P.V. arrays Interest of D.C.-D.C. converters

The present investigation is concerned with the effects produced by a lack of matching between the photovoltaic arrays and the batteries to which the arrays are connected. Questions of coupling between photovoltaic arrays and batteries are investigated, taking into account experiments involving two kinds of modules with different encapsulation structures. These structures include a type A involving a glass-glass encapsulation and a type B which uses an organic material rear face. Problems arising in connection with the introduction of a dc-to-ac converter are discussed. In the case of the batteries, difficulties are related to the smoothing of the current delivered to the load. A capacitance is employed for the intermediate storage of the energy to be transferred.