Solar Charge Controller
Pulse Width Modulation (PWM) is the most effective means to achieve constant voltage battery charging by switching the solar system controllers power devices. When in PWM regulation, the current from the solar array tapers according to the batterys condition and recharging needs.
MPPT or Maximum Power Point Tracking is algorithm that included in charge controllers used for extracting maximum available power from PV module under certain conditions. The voltage at which PV module can produce maximum power is called maximum power point (or peak power voltage). Maximum power varies with solar radiation, ambient temperature and solar cell temperature.