Here we try to understand the actual circuit concept of MPP T type of solar charger controllers and learn how do these devices work. MPPT stands for Maximum Power Point Tracking, a charger concept specifically intended and designed for acquiring highly efficient solar power harnessing . Solar panels are excellent devices since they allow us to harness free electrical energy from sun, however the present devices are not very efficient with their outputs. As we all know output from solar panel directly depends the incident rays of the sun, as long as its near perpendicular on it offers good efficiency, which keeps on deteriorating with slanting rays or dipping sun position. The above also gets affected with overcast conditions. Moreover a solar panel output is associated with inconsistent voltage levels which needs proper regulation in order to operate the load which is normally a lead acid battery . Lead acid batteries or any kind of chargeable battery will require a properly ...