MPPT tracker in solar inverter system

Tags: String inverter

MPPT conventionally are located in Inverter that is supposed to track each PV module from an array parallel connected series strings. PP point of all panels are not /cannot be same. Therefore such tracking fails to harvest full power loss could be as high as 15%. Further this demands that all modules have matched MPPT. Further placing MPPT in each module prevented shadow loss in series strings where shadow on one module reduces energy harvest from the entire string of 20 modules or more.. LEECH HV PV modules also boost peak power voltage to voltage as high as 430VDC. That drops ohmic losses and reduces cable costs since module output current drops from 10A to an amp...conversion efficiency is also over 98% peak. All parallel Rooftop Arrays are an advancement that leads to higher energy yields.

In the common string connection, all the PV cells within each panel is wired in series, then all the panels are wired together in series. So the DC voltage getting out of the array of panels is already high, often in the thousands of volts. Too high a DC voltage might be as uneconomical to handle as too low.