In Figure 12 and Figure 13 performance of the algorithm at a low panel current is tested. The accuracy ofthe tracker in selecting the optimal MPP operating voltage degrades slightly due to the midpointcalculation. The number of sample points that show the same maximum ADC charge current increases forlower short circuit currents, moving the midpoint further away from the VMPP. This effect can be mitigatedwith an improved selection calculation for different voltages that report the same maximum current