Technical advantages of Half cut technology on Solar Modules

01 Sep 2021

Solar cell technology is evolving and improving continuously. Based on new technologies, half cut cell has been a quite popular now a days that helped solar modules to perform with better efficiency and performance.

What half cut cell Solar Modules:

Half-cell modules have solar cells that are cut in half, which improves the module’s performance and durability. Traditional 60- and 72-cell panels will have 120 and 144 half-cut cells, respectively.

Advantages of half cut cell Solar Modules:

Reduce resistive losses:

One source of power loss when solar cells convert sunlight into electricity is resistive losses, or power lost during electrical current transport. Solar cells transport current using the thin metal ribbons that cross their surface and connect them to neighboring wires and cells and moving current through these ribbons leads to some energy lost. Since power loss equals resistance multiplied by the current squared (P loss = R x I²), a reduction in current would reduce the loss.

Shade tolerance:

Half-cut cells are more resistant to the effects of shade than traditional solar cells. This is not due to the cells being cut in half, but rather a result of the wiring methods used to connect half-cut cells in a panel.

For full-cell standard solar panels, the cells are wiring together in rows. We call it series wiring. In series wiring schemes, if one cell in a row is shaded and not producing energy, the entire row of cells will stop producing power.

Here’s what happens on a standard solar panel. The current flow is shown in orange, with the bottom bypass diode activated:

Here 2/3 of the cell strings are active which will generate only 67% output of power. But when there's shade on the half cut cell Instead of having 3 cell-strings like a standard solar panel, the half-cut panel has 6 cell strings making it a 6 string panel. One small spot of shade on a half-cut panel makes things interesting.

But for a half cut cell technology, solar panel has 6 separate cell-strings with 3 only bypass diodes offering 5/6 cell strings active which will generate close to 84% output of power during the shaded condition.

Lower hotspot effects:

When one solar cell in a panel cell string is shaded, all the preceding unshaded cells can dump the energy they produce into the first shaded cell as heat. This creates a hot spot that can potentially damage the solar panel if it lasts for a long time.

Twice as many panel cell strings mean only half as much heat. But, as the shaded cell only has half the area to radiate heat as a normal cell, the decreased total amount of heat produced should be less damaging to the panel. As a result, there is likely to be an improvement in resistance to hot spot damage.

Durability:

Aside from having a higher energy output, half-cut cells are more durable, ensuring longer life performance when compared to traditional solar cells. Because of their more compact structure, half-cut cells are less prone to micro-cracks, because it can't travel as far as possible while exposure to extreme weather conditions, such as snow, hail, sun, wind and severe cold temperatures.

Based on these advantages on the current times, Half cut Solar cells are gaining popularity over the globe, which inspires the manufacturer to produce more Half cut solar cells on the recent times.

EverExceed has more than 15 years of manufacturing experience in solar panels. EverExceed use raw materials to manufacture solar panels from the top 5 manufacturer. Based on the vast knowledge, EverExceed select the best, high quality, high reliability product to manufacture solar panel. Based on different industry and requirement, EverExceed provide solar module for different applications. If you want to know more about EverExceed Half Cut Solar Panel (400W~540W) contact EverExceed today. Our team is experienced enough to provide you best solution for your needs.

tags :