Does PV Optimizer really work for shadow occlusion treatment?

To ask "What is the most feared problem of  photovoltaic power generation?" Experienced people must know "the problem of shadow occlusion."

1. Small shadows, big hazards
Because the position of the sun changes with the seasons and time, and the surrounding potential obstructions also change over time, anyone with experience in installing photovoltaic power plants understands that shadows are difficult to predict and difficult to complete. avoid. Many times, after the construction of photovoltaic power plants is completed, it is discovered that there are shadows!

Typical shadow occlusion:

Dust, stains, trees and leaves, bird droppings, flagpoles, water heaters, parapets, electrical wiring, surrounding buildings, and various roof structures can create a variety of shades. As the sun's position moves, so does the shadow shape.

Someone said: "Why is my photovoltaic power station so much less than the neighbor's power generation? Isn't it just covering one or two panels sometimes?"

This situation reflects the seriousness of the hazard of shadow occlusion: at this time, the partial occlusion of one solar panel is equivalent to all solar panels of the power station being occluded by shadows, which is a typical "barrel effect".

In many rooftop photovoltaic power stations, many owners often cannot completely avoid the shadow in order to install it in place at one time, because the owners feel that the area covered by the shadow is not large anyway, and the impact should not be great, but in fact, the power of small-scale shadows is ignored. According to calculations, the slight shade of trees and wires in the photovoltaic system can cause the power generation of the entire power station to be reduced by about 20-30%!

2. " Reduce shadow occlusion impact": PV Optimizer
A smart photovoltaic optimizer can be installed on modules with shadows or facing different module positions, that is, using module-level MPPT maximum power tracking, which is the so-called "shadow management artifact" in the industry.

Solution: In the first step, first observe the shadow occlusion in the morning and evening, and find out which modules are shadowed; In the second step, it is only necessary to install the intelligent photovoltaic optimizer at the position of the shaded module backplane, and replace the output wiring of the module with the output of the optimizer, and the other does not need to be changed.

This solution is characterized by "Which module is shaded? Install the Smart PV Optimizer right there!"

Therefore, the solution is very cost-effective, and the installation is very convenient, and the problem of the barrel effect of shadow occlusion can be solved in just a few minutes.

3. How is the effect of PV optimizer?

In an experimental scenario, a total of 11 modules are connected in series and connected to one MPPT of the grid-connected inverter. Under different shadow shading conditions, the simulation test is carried out on the shadow shading of the power station and the effect of the intelligent photovoltaic optimizer.
(1) The bottom edge of one solar panel is blocked

(2) Simulate one solar panel blocked by tree shadows

(4) Simulate the all-day shading of the chimney

A large number of practices have proved that in various shadow occlusion scenarios, installing an intelligent photovoltaic optimizer can generate 5% - 20% more power.