Maximum Power Point Tracking (MPPT)
These controllers also function like PWM controllers to regulate the current flow based on the SOC of the batteries. In addition, they also have an MPPT algorithm to operate solar panels at a voltage that corresponds to the point of maximum power. The DC to DC controller, also built-in, now converts this high voltage to lower voltage of the battery and proportionally increases the current maintaining the power flow and maximizing charge current.
Maxima MPPT Charge Controller
Reasonably priced advanced MPPT controller that maximizes power draw from PV panels
Victron MPPT Charge Controller
Commercial grade MPPT controllers from Victron to for a robust and highly efficient solar PV off-grid system
Morning Star MPPT Charge Controller
Trakstar technology, an advanced control algorithmic function that harvests the maximum power possible from a solar array