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Solar panels have different efficiency ratings, with most modern models ranging between 13% and 25%. Generally, the higher the efficiency, the more expensive the panel. The key is to find the most cost-effective option within your budget rather than simply choosing the most expensive one.
What Are Your Options? Here Are the Most Common Types:
Monocrystalline Solar Panels
Monocrystalline solar panels, made from a single piece of pure silicon, have an efficiency rating of around 20%. They are among the most efficient options available today. These panels are also known for their superior durability, making them ideal for homes in harsh climates.
Polycrystalline Solar Panels
Polycrystalline solar panels are slightly less efficient, with ratings between 15% and 17%. However, they offer a more affordable alternative while still being durable. These panels are made from multiple silicon crystals, not just one, which reduces production costs by minimizing waste.
PERC Solar Panels
PERC stands for Passive Emitter Rear Cell. These panels are similar to monocrystalline and polycrystalline panels in terms of material. However, they include an additional passivation layer that:
- Reflects sunlight to the main cell, increasing energy absorption.
- Reduces electron grouping, allowing for freer movement.
- Helps the panel absorb higher wavelengths to prevent the back sheet from heating up and losing efficiency.
Thin-Film Solar Panels
Thin-film solar panels are the most affordable option, though they have the lowest efficiency rating, typically between 13% and 15%.
Can I Increase the Efficiency of Solar Panels in My Home?
While you can’t increase the inherent efficiency of your solar panels, you can keep them operating at peak efficiency for a long time. To maximize their performance, ensure your home is solar-ready. Ideally, your roof should face south, have a slope between 15% and 40%, and be free of obstructions like trees. Additionally, it should be large enough to accommodate the number of panels your household needs.
This post was written by Daniel Massaad, owner and expert solar technician at Energy Solutions Direct! ESD is the top choice for Tampa solar installers! Our licensed and certified contractors are masters of their craft; with years of experience servicing the great Tampa Bay area and beyond, the choice is simple. ESD excels at offering you the best in solar value!
