Solar Panel Degradation Chart

For many panels this is given as 2 to 3 in the first year and then 0 7 a year after that but it can be as low as 0 25 a year for some sunpower panels.

Solar panel degradation chart.

For most tier 1 solar panels the degradation rate is 30 meaning that each year the panels performance is reduced by 30. X series solar panels are perfect for space constrained projects while e series solar panels are a great all around solar panel choice. In 1977 the department of energy established the solar energy research institute in golden colorado. These solar panels are best for large commercial projects.

On average solar panels degrade at a rate of 1 each year. P series solar panels are built with sunpower s unique shingled solar cells. Note these figures may have a minus sign in front of them as in 0 7 or 0 25. Over 25 years that adds up to a total of 6 96 meaning your panels will operate at 93 04 of their original capacity in 2045.

In addition degradation rates for 10 selected systems were found to be larger than 1 year. Reported on block iv and v monocrystalline si systems deployed in florida and found degradation rates well below 1 year 32. However a study conducted by the national renewable energy laboratory nrel shows a more accurate picture of solar panel degradation. 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.