I mean this sincerely, with emotions in this country so raw, whomever is in charge of Donald Trump's twitter needs to stop him from tweeting â Meghan McCain (@MeghanMcCain) November 11, 2016
How Long do Solar Panels Last. Generally speaking, a solar panel will last 30 years or more and lose some Â½ percent (0.5%) conversion efficiency annually. Hosing the panels off a few times during the summer and keeping leaves off them in the fall is about the only maintenance required.. Learn about the two kinds of solar system warranties that are normally offered. The first one is the panel and inverter manufacturer warranty, which are usually 20-25 years on panels and 5-10 years on the inverters.
The second class of solar panels are both the polycrystalline solar panels and the monocrystalline solar panels and these together make up around 95% of solar panels sold in America. Most of these solar panels have 25 year warranties and I have seen many solar panels of these types that are more than 30 years old still working quite well. I don't think there is likely to be any difference between monocrystalline and polycrystalline solar panels when it comes to how long they last.