5 ms·

Will new solar panels last 25 years? Most of stuff on the outside on my house doesn't have a lifespan that long. You could end up paying off the loan after the

• 3am 12y ago
  Most are warranteed at a particular percentage of nameplate capacity (95%+) at delivery and then in a straight-line decay after a certain point out to a certain level (75-80%) at 25 years. http://us.sunpower.com/sites/sunpower/files/media-library/warranties/wr-sunpower-limited-product-and-power-warranty-pv-modules.pdf http://us.sunpower.com/sites/sunpower/files/media-library/wa... [edit: better link], for example. that is 95% through year 5, then .4% linearly through year 25, or 87% of nameplate at year 25. They are a premium vendor, but the warantee structure is fairly standard across legitimate vendors. edit: http://www.yinglisolar.com/assets/uploads/warranty/downloads/PANDA_standard_110928.pdf http://www.yinglisolar.com/assets/uploads/warranty/downloads... - 98% at install, 92% at 10 years, and 82% at 25 years. edit: http://www.trinasolar.com/downloads/us/products/EN_Trina_Warranty_Jan_2013.pdf http://www.trinasolar.com/downloads/us/products/EN_Trina_War... 2.5/3.5% in year 1, 0.7/0.68% through year 25 (80.7/80.18 % at end) for poly/mono- crystalline products, respectively ... and so on.
  • cagenut 12y ago
    an upvote is not enough, thank you for a response with hard numbers and multiple linked sources.
• roel_v 12y ago
  Many have guarantees of 20 years. Whether there will be someone around to honor that guarantee is another matter, of course.