The mean average degradation rate was 0 8 to 0 9.
Solar panel degradation values.
Phono solar produced in nanjing china and kyocera corp.
However a study conducted by the national renewable energy laboratory nrel shows a more accurate picture of solar panel degradation.
In the years since this 2012 study was conducted more efficient technologies have been developed and many newer panels have just a 0 5 percent yearly decline in energy output or better.
Since these panels have a higher efficiency they can produce more.
The worst degradation rate is 80 a year but as a benchmark you can expect an average degradation rate of 50 a year for any panel.
On average solar panels degrade at a rate of 1 each year.
Even their 360 watt panel only comes in at 19 9 efficiency compared to sunpower s lower wattage 335 model.
So as you can see the sunpower solar panels x and a series solar panels even the lower wattage ones have a higher efficiency than the most efficient solaria panel.
Based in japan but produced in tijuana mexico were the top performing manufacturers with less than 1 5 degradation.
Solar panel degradation rates are constantly improving as solar panel technology gets better over the years and degradation rates below 1 are common throughout the industry.
This study took a look at the degradation rates for almost 2 000 solar systems across the world in a variety of climates and found that monocrystalline.