In MPPT, most control schema use the P&O technique because it is easy to implement. But the oscillation problem is unavoidable. This research developed an extended P&O technique – a three-point weight comparison method based on an 8-bit single-chip control unit - by utilizing a boost converter to adjust the output voltage of the PV for tracking the MPP. Models and simulations of this PV system and MPPT algorithms are offered with experimental results.