Solar Panel Degradation Values

However a study conducted by the national renewable energy laboratory nrel shows a more accurate picture of solar panel degradation.

Solar panel degradation values.

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. 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. 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. On average solar panels degrade at a rate of 1 each year.

The mean average degradation rate was 0 8 to 0 9. Phono solar produced in nanjing china and kyocera corp. That s backed up by the solar panel manufacturer s warranty which guarantees 90 production in the first ten years and 80 by year 25 or 30. 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.

Based in japan but produced in tijuana mexico were the top performing manufacturers with less than 1 5 degradation. Even their 360 watt panel only comes in at 19 9 efficiency compared to sunpower s lower wattage 335 model. 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.