Abstract— The photovoltaic (PV) stand-alone system requires a
battery charger for energy storage. This paper presents the
modelling and control design of the PV charger system using
Buck-Boost converter. The voltage command is determined by
both the PV module maximum power point tracking (MPPT)
control loop and the battery charging loop. Here the controller is
designed so as to balance the power flow from PV module to the
battery and the load such that the PV power is utilized effectively
and the battery charged with three charging stages. This paper
discusses the design and simulation of buck-boost converter with
battery charge controller and MPPT controller using MATLAB.