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How efficient should solar panels be?
What is a good level of energy efficiency to expect from solar panels?
Expert Trade Answers
"Hi Caroline, they should be producing between 15-20% of the solar energy into usable energy.
Thank you!
Kr
Sam"
Thank you!
Kr
Sam"
Answered on 3rd Oct 2022 - Member since Sep 2022 -
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"Modern solar panels typically offer energy efficiency between 18% and 22%, which is considered good for residential and commercial use. Monocrystalline panels usually fall within this range and are the most efficient. Polycrystalline panels are slightly less efficient but more affordable. Panels below 15% efficiency are generally outdated. While efficiency is important, factors like durability, warranty, and cost per watt should also be considered when choosing the best solar panel system."
Answered on 8th Jun 2025 - Member since Jan 2025 -
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"There are many factors to take into account when answering that such as position, shading and location of property.
But as a rule of thumb most domestic panels are around 15-20% efficient.
You can get more efficient ones but they are considerably more expensive."
But as a rule of thumb most domestic panels are around 15-20% efficient.
You can get more efficient ones but they are considerably more expensive."
Answered on 3rd Oct 2022 - Member since Apr 2017 -
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