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PERC Solar Panels – Top Benefits to Know
PERC solar panels are rapidly establishing themselves as a top choice in the renewable energy market. However, before diving into what PERC and PERC technology actually mean, it's essential to grasp how conventional solar panels function. In traditional solar panels, inefficiencies often arise because sunlight can be reflected off the solar cell, obstructed by wires, or pass entirely through the cell, converting into heat rather than electricity. Adding a front passivation layer helps reduce reflection and front-side recombination significantly.
Understanding these inefficiencies and finding ways to maintain consistent energy output is where PERC solar panels truly shine.
Also Read: A Comprehensive Guide to Solar Panel Installation
PERC solar panels, or Passivated Emitter and Rear Contact panels, are crafted using PERC cells. These cells outperform traditional ones thanks to an extra layer on the back that allows more sunlight to be converted into electricity. This layer also minimizes rear recombination and stops longer wavelengths from transforming into heat, which could otherwise degrade the cell's performance.
Although the technology was first introduced in 1989, continuous advancements over the years have made PERC panels more efficient than most traditional solar panels available today. They share a similar structure with traditional panels and can leverage existing manufacturing equipment.
Different Types of PERC Solar Modules
There are two main types of PERC solar panels, categorized based on their price and efficiency.
Mono PERC Solar Panel
Mono PERC panels, or monocrystalline PERC solar cells, are created from a single silicon crystal. These cells are more efficient than polycrystalline panels but come at a higher price point. Additional PERC layers can be incorporated to boost efficiency further.
Poly PERC Cells
These cells combine fragments of silicon, giving them the name polycrystalline cells. While they are less efficient than mono cells, they are more budget-friendly. Adding a PERC layer can enhance poly cell efficiency, though not to the same degree as mono cells.
Benefits of PERC Solar Panels
Increased Energy Production
PERC solar cells are about 1% more efficient than traditional solar panels in terms of energy production. Although this might seem minor on its own, across an entire photovoltaic system, this improvement can result in a total energy increase of up to 5%.
Improved Performance in Low-Light and High-Temperature Conditions
Traditional solar panels struggle in low-light and high-temperature environments, but PERC solar panels thrive under such conditions. They can achieve a 3% efficiency boost when operating in high temperatures and low light.
Smaller Roof Footprint
Thanks to their enhanced efficiency, fewer PERC panels are needed to meet the energy demands of homes and businesses. This means designers and installers can fit fewer panels on smaller rooftops. For instance, a site requiring 40 standard modules for electricity generation would need only 38 PERC modules.
Reduced Balance of System (BOS) and Soft Costs
With fewer panels required for the same output, PERC panels help cut down on various soft costs. Homeowners and installers alike can save money on disconnects, inverters, labor costs, and other balance of system (BOS) expenses.
Same Manufacturing Costs
One of the key advantages of PERC panels, contributing to their rising popularity, is that they cost the same to produce as traditional panels.
In summary, PERC solar panels offer an excellent option for those looking to generate the same amount of energy with fewer panels and lower labor and installation costs. They are more efficient than conventional panels and require less wiring, racking, and microinverter technology to operate effectively.