Since MLPEs have dedicated electronics at each solar module, the electronics can perform MPPT on each panel individually, with other features including measuring power outputs and rapid shutdown.
Module-Level MPPT
Module-level MPPT can reduce the impact of module mismatch caused by individual panel shading, soiling, by isolating the low power module from the perfect ones.
This way, when any particular module is shaded, other unobstructed panels can still operate at full strength, instead of being dragged down like the string inverter system.
Module-Level Monitoring
MLPEs can measure the performance of individual panels, which leads to more sophisticated monitoring systems that let owners see the output of each panel, and makes it easier to pinpoint module defects when troubleshooting.
Rapid Shutdown
A common problem with solar systems is the risk of electrocution to firefighters in the event of a fire during the day.
By having dedicated electronics at each panel, the MLPEs can “turn off” the solar panels by way of rapid shutdown.
This provides a safer provision for firefighters in the event of a fire.
Major types of MLPEs include power optimizers and microinverters, and we’ll describe the differences between the two below.