Тhe PV controllers which are with built-in algorithm for tracking the maximum power point of the photovoltaic generator (Maximum Power Point Tracking) are the most optimal and perfect option for each installation. They are suitable for all kind of PV autonomous systems - through the small and avarage-sized (12/24V) up to the big ones (48V). Due to their mode of operation, the yield could be increased by up to 30% compared with conventional solar controllers.

Fig.1 - The difference between controllers with pulse-width modulation (PWM) and controllers with                                                         maximum power point tracking (MPPT).