Owner's Guide

Maximum Power Point Tracking
Maximum Power Point Tracking (MPPT), allows the charge controller to harvest the
maximum energy available from the PV array and deliver it to the batteries. The MPPT
algorithm continuously adjusts the operating voltage of the array to find the maximum
power point. Input power is measured and compared to the amount of input power
harvested at the previous operating voltage. The next adjustment to the operating voltage
is dependent upon whether the charge controller harvested more or less power than it did
at the previous operating voltage.
The algorithm is implemented by applying a variable load on the array—shown by the
power curve (solid line) in Figure 1—until it finds the peak power (the point at which the
combination of the operating voltage and current is maximized), as indicated by MPP in
Figure 1. The charge controller will continue adjusting the operating voltage to stay on the
maximum power point. This is necessary as MPP changes throughout the day due to
panel temperature, panel shading, and sunlight intensity. The adjustments happen
without interruption of output power flow to the batteries.
Figure 1PVpanel characteristics
Fast Sweep™ Shade Tolerant MPPT Algorithm
The charge controller has a Fast Sweep MPPT algorithm that frequently conducts a very
fast sweep of the full operational array voltage window to dynamically determine the
array’s maximum power point. This feature optimizes the high energy harvest of the solar
array., regardless of conditions such as temperature and shading. For more information
on shade-tolerant MPPT optimization, visit solar.schneider-electric.com/solar.
Introduction Conext MPPT 80 and Conext MPPT 100 Owner’s Guide
990-6214B This document is for use by qualified personnel 22