maximum power point tracker
A charge controller, manufactured by Blue Sky Energy, that uses a maximum power point tracking to boost charge current when batteries are low and the maximum power point voltage of solar panels is high.
A maximum power point tracker (MPPT) is a power conditioning unit that automatically operates the photovoltaic-generator at its maximum power point (MPP) under all conditions. An MPPT will typically increase power delivered to the system by 10% to 40%, depending on climate conditions and battery state of charge.