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Solar Panel Efficiency

Last updated 12/16/2022

Get an estimate of solar cost and savings at your home.

Engineers checking the efficiency of solar panels using a tablet.
Alvaro Medina Jurado/Moment/Getty images

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Key Points

  • Solar panel efficiency is the percentage of the sun’s energy converted to electricity in a solar panel
  • PV solar cell efficiency increased from 10% in the 1990s to the current 20%
  • Solar cell design, panel location roof angle, and atmospheric heat affect the efficiency of solar panels
  • Efficiency ratings differ between solar panel types

Curious about solar panel types and what suits best for your needs? SaveOnEnergy provides you the answers:


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